Add pointer cursor to ha-formfield in update card

Fix typo on config page + adjust icon color (#10713 )
Finish up config changes (#10710 )
2026-05-18 07:07:36 +00:00 · 2021-11-29 06:01:17 +00:00 · 2021-11-28 17:52:39 +01:00 · 2021-11-26 17:24:30 +01:00 · 2021-11-26 17:11:06 +01:00 · 2021-11-25 16:56:57 +01:00
1591 changed files with 228797 additions and 85352 deletions
@@ -0,0 +1,13 @@
+# See here for image contents: https://github.com/microsoft/vscode-dev-containers/tree/v0.148.1/containers/python-3/.devcontainer/base.Dockerfile
+FROM mcr.microsoft.com/vscode/devcontainers/python:0-3.9
+
+ENV \
+  DEBIAN_FRONTEND=noninteractive \
+  DEVCONTAINER=true \
+  PATH=$PATH:./node_modules/.bin
+
+# Install nvm
+COPY .nvmrc /tmp/.nvmrc
+RUN \
+  su vscode -c \
+    "source /usr/local/share/nvm/nvm.sh && nvm install $(cat /tmp/.nvmrc) 2>&1"
@@ -0,0 +1,34 @@
+{
+  "name": "Home Assistant Frontend",
+  "build": {
+    "dockerfile": "Dockerfile",
+    "context": ".."
+  },
+  "appPort": "8124:8123",
+  "context": "..",
+  "postCreateCommand": "script/bootstrap",
+  "extensions": [
+    "github.vscode-pull-request-github",
+    "dbaeumer.vscode-eslint",
+    "ms-vscode.vscode-typescript-tslint-plugin",
+    "esbenp.prettier-vscode",
+    "bierner.lit-html",
+    "runem.lit-plugin",
+    "ms-python.vscode-pylance"
+  ],
+  "settings": {
+    "terminal.integrated.shell.linux": "/bin/bash",
+    "files.eol": "\n",
+    "editor.tabSize": 2,
+    "editor.formatOnPaste": false,
+    "editor.formatOnSave": true,
+    "editor.formatOnType": true,
+    "[typescript]": {
+      "editor.defaultFormatter": "esbenp.prettier-vscode"
+    },
+    "[javascript]": {
+      "editor.defaultFormatter": "esbenp.prettier-vscode"
+    },
+    "files.trimTrailingWhitespace": true
+  }
+}
@@ -1,4 +0,0 @@
-node_modules
-hass_frontend
-hass_frontend_es5
-.git
@@ -1,11 +1,11 @@
 {
  "extends": [
-    "plugin:@typescript-eslint/recommended",
+    "airbnb-base",
    "airbnb-typescript/base",
+    "plugin:@typescript-eslint/recommended",
    "plugin:wc/recommended",
-    "plugin:lit/recommended",
-    "prettier",
-    "prettier/@typescript-eslint"
+    "plugin:lit/all",
+    "prettier"
  ],
  "parser": "@typescript-eslint/parser",
  "parserOptions": {
@@ -29,60 +29,91 @@
    "__BUILD__": false,
    "__VERSION__": false,
    "__STATIC_PATH__": false,
-    "Polymer": true,
-    "webkitSpeechRecognition": false,
-    "ResizeObserver": false
+    "__SUPERVISOR__": false,
+    "Polymer": true
  },
  "env": {
    "browser": true,
    "es6": true
  },
  "rules": {
-    "class-methods-use-this": 0,
-    "new-cap": 0,
-    "prefer-template": 0,
-    "object-shorthand": 0,
-    "func-names": 0,
-    "prefer-arrow-callback": 0,
-    "no-underscore-dangle": 0,
-    "no-var": 0,
-    "strict": 0,
-    "prefer-spread": 0,
-    "no-plusplus": 0,
-    "no-bitwise": 0,
-    "comma-dangle": 0,
-    "vars-on-top": 0,
-    "no-continue": 0,
-    "no-param-reassign": 0,
-    "no-multi-assign": 0,
-    "radix": 0,
-    "no-alert": 0,
-    "no-return-await": 0,
-    "no-nested-ternary": 0,
-    "prefer-destructuring": 0,
+    "class-methods-use-this": "off",
+    "new-cap": "off",
+    "prefer-template": "off",
+    "object-shorthand": "off",
+    "func-names": "off",
+    "no-underscore-dangle": "off",
+    "strict": "off",
+    "no-plusplus": "off",
+    "no-bitwise": "error",
+    "comma-dangle": "off",
+    "vars-on-top": "off",
+    "no-continue": "off",
+    "no-param-reassign": "off",
+    "no-multi-assign": "off",
+    "no-console": "error",
+    "radix": "off",
+    "no-alert": "off",
+    "no-nested-ternary": "off",
+    "prefer-destructuring": "off",
    "no-restricted-globals": [2, "event"],
-    "prefer-promise-reject-errors": 0,
-    "import/order": 0,
-    "import/prefer-default-export": 0,
-    "import/no-unresolved": 0,
-    "import/no-cycle": 0,
+    "prefer-promise-reject-errors": "off",
+    "import/prefer-default-export": "off",
+    "import/no-default-export": "off",
+    "import/no-unresolved": "off",
+    "import/no-cycle": "off",
    "import/extensions": [
-      2,
+      "error",
      "ignorePackages",
      { "ts": "never", "js": "never" }
    ],
    "no-restricted-syntax": ["error", "LabeledStatement", "WithStatement"],
-    "object-curly-newline": 0,
-    "default-case": 0,
-    "wc/no-self-class": 0,
-    "@typescript-eslint/camelcase": 0,
-    "@typescript-eslint/ban-ts-ignore": 0,
-    "@typescript-eslint/no-use-before-define": 0,
-    "@typescript-eslint/no-non-null-assertion": 0,
-    "@typescript-eslint/no-explicit-any": 0,
-    "@typescript-eslint/no-unused-vars": 0,
-    "@typescript-eslint/explicit-function-return-type": 0
+    "object-curly-newline": "off",
+    "default-case": "off",
+    "wc/no-self-class": "off",
+    "no-shadow": "off",
+    "@typescript-eslint/camelcase": "off",
+    "@typescript-eslint/ban-ts-comment": "off",
+    "@typescript-eslint/no-use-before-define": "off",
+    "@typescript-eslint/no-non-null-assertion": "off",
+    "@typescript-eslint/no-explicit-any": "off",
+    "@typescript-eslint/explicit-function-return-type": "off",
+    "@typescript-eslint/explicit-module-boundary-types": "off",
+    "@typescript-eslint/no-shadow": ["error"],
+    "@typescript-eslint/naming-convention": [
+      "off",
+      {
+        "selector": "default",
+        "format": ["camelCase", "snake_case"],
+        "leadingUnderscore": "allow",
+        "trailingUnderscore": "allow"
+      },
+      {
+        "selector": ["variable"],
+        "format": ["camelCase", "snake_case", "UPPER_CASE"],
+        "leadingUnderscore": "allow",
+        "trailingUnderscore": "allow"
+      },
+      {
+        "selector": "typeLike",
+        "format": ["PascalCase"]
+      }
+    ],
+    "@typescript-eslint/no-unused-vars": "off",
+    "unused-imports/no-unused-vars": [
+      "error",
+      {
+        "vars": "all",
+        "varsIgnorePattern": "^_",
+        "args": "after-used",
+        "argsIgnorePattern": "^_",
+        "ignoreRestSiblings": true
+      }
+    ],
+    "unused-imports/no-unused-imports": "error",
+    "lit/attribute-value-entities": "off",
+    "lit/no-template-map": "off"
  },
-  "plugins": ["disable", "import", "lit", "prettier", "@typescript-eslint"],
+  "plugins": ["disable", "unused-imports"],
  "processor": "disable/disable"
 }
@@ -51,7 +51,7 @@ DO NOT DELETE ANY TEXT from this template! Otherwise, your issue may be closed w
 <!--
  Provide details about the versions you are using, which helps us reproducing
  and finding the issue quicker. Version information is found in the
-  Home Assistant frontend: Developer tools -> Info.
+  Home Assistant frontend: Configuration -> Info.

  Browser version and operating system is important! Please try to replicate
  your issue in a different browser and be sure to include your findings.
@@ -74,12 +74,12 @@ DO NOT DELETE ANY TEXT from this template! Otherwise, your issue may be closed w

 ```

-## Problem-relevant configuration
+## Problem-relevant frontend configuration

 <!--
-  An example configuration that caused the problem for you. Fill this out even
-  if it seems unimportant to you. Please be sure to remove personal information
-  like passwords, private URLs and other credentials.
+  An example configuration that caused the problem for you, e.g. the YAML configuration
+  of the used cards. Fill this out even if it seems unimportant to you. Please be sure
+  to remove personal information like passwords, private URLs and other credentials.
 -->

 ```yaml
@@ -89,7 +89,7 @@ DO NOT DELETE ANY TEXT from this template! Otherwise, your issue may be closed w
 ## Javascript errors shown in your browser console/inspector

 <!--
-  If you come across any javascript or other error logs, e.g., in your browser
+  If you come across any Javascript or other error logs, e.g. in your browser
  console/inspector please provide them.
 -->

@@ -1,26 +0,0 @@
---
-name: Request a feature for the UI, Frontend or Lovelace
-about: Request an new feature for the Home Assistant frontend.
-labels: feature request
---
-
-<!--
-  DO NOT DELETE ANY TEXT from this template!
-  Otherwise, your request may be closed without comment.
-->
-
-## The request
-
-<!--
-  Describe to our maintainers, the feature you would like to be added.
-  Please be clear and concise and, if possible, provide a screenshot or mockup.
-->
-
-## The alternatives
-
-<!--
-  Are you currently using, or have you considered alternatives?
-  If so, could you please describe those?
-->
-
-## Additional information
@@ -0,0 +1,121 @@
+name: Report a bug with the UI, Frontend or Lovelace
+description: Report an issue related to the Home Assistant frontend.
+labels: bug
+body:
+  - type: markdown
+    attributes:
+      value: |
+        Make sure you are running the [latest version of Home Assistant][releases] before reporting an issue.
+
+        If you have a feature or enhancement request for the frontend, please [start an discussion][fr] instead of creating an issue.
+
+        **Please not not report issues for custom Lovelace cards.**
+
+        [fr]: https://github.com/home-assistant/frontend/discussions
+        [releases]: https://github.com/home-assistant/home-assistant/releases
+  - type: checkboxes
+    attributes:
+      label: Checklist
+      description: Please verify that you've followed these steps
+      options:
+        - label: I have updated to the latest available Home Assistant version.
+          required: true
+        - label: I have cleared the cache of my browser.
+          required: true
+        - label: I have tried a different browser to see if it is related to my browser.
+          required: true
+  - type: markdown
+    attributes:
+      value: |
+        ## The problem
+  - type: textarea
+    validations:
+      required: true
+    attributes:
+      label: Describe the issue you are experiencing
+      description: Provide a clear and concise description of what the bug is.
+  - type: textarea
+    validations:
+      required: true
+    attributes:
+      label: Describe the behavior you expected
+      description: Describe what you expected to happen or it should look/behave.
+  - type: textarea
+    validations:
+      required: true
+    attributes:
+      label: Steps to reproduce the issue
+      description: |
+        Please tell us exactly how to reproduce your issue.
+        Provide clear and concise step by step instructions and add code snippets if needed.
+      value: |
+        1.
+        2.
+        3.
+        ...
+  - type: markdown
+    attributes:
+      value: |
+        ## Environment
+  - type: input
+    validations:
+      required: true
+    attributes:
+      label: What version of Home Assistant Core has the issue?
+      placeholder: core-
+      description: >
+        Can be found in the Configuration panel -> Info.
+  - type: input
+    attributes:
+      label: What was the last working version of Home Assistant Core?
+      placeholder: core-
+      description: >
+        If known, otherwise leave blank.
+  - type: input
+    attributes:
+      label: In which browser are you experiencing the issue with?
+      placeholder: Google Chrome 88.0.4324.150
+      description: >
+        Provide the full name and don't forget to add the version!
+  - type: input
+    attributes:
+      label: Which operating system are you using to run this browser?
+      placeholder: macOS Big Sur (1.11)
+      description: >
+        Don't forget to add the version!
+  - type: markdown
+    attributes:
+      value: |
+        # Details
+
+  - type: textarea
+    attributes:
+      label: State of relevant entities
+      description: >
+        If your issue is about how an entity is shown in the UI, please add the
+        state and attributes for all situations. You can find this information
+        at Developer Tools -> States.
+      render: txt
+  - type: textarea
+    attributes:
+      label: Problem-relevant frontend configuration
+      description: >
+        An example configuration that caused the problem for you, e.g., the YAML
+        configuration of the used cards. Fill this out even if it seems
+        unimportant to you. Please be sure to remove personal information like
+        passwords, private URLs and other credentials.
+      render: yaml
+  - type: textarea
+    attributes:
+      label: Javascript errors shown in your browser console/inspector
+      description: >
+        If you come across any Javascript or other error logs, e.g., in your
+        browser console/inspector please provide them.
+      render: txt
+  - type: textarea
+    attributes:
+      label: Additional information
+      description: >
+        If you have any additional information for us, use the field below.
+        Please note, you can attach screenshots or screen recordings here, by
+        dragging and dropping files in the field below.
@@ -1,5 +1,8 @@
 blank_issues_enabled: false
 contact_links:
+  - name: Request a feature for the UI, Frontend or Lovelace
+    url: https://github.com/home-assistant/frontend/discussions/category_choices
+    about: Request an new feature for the Home Assistant frontend.
  - name: Report a bug that is NOT related to the UI, Frontend or Lovelace
    url: https://github.com/home-assistant/core/issues
    about: This is the issue tracker for our frontend. Please report other issues with the backend repository.
@@ -18,8 +18,8 @@
 <!--
  Describe the big picture of your changes here to communicate to the
  maintainers why we should accept this pull request. If it fixes a bug
-  or resolves a feature request, be sure to link to that issue in the
-  additional information section.
+  or resolves a feature request, be sure to link to that issue or discussion
+  in the additional information section.
 -->

 ## Type of change
@@ -56,7 +56,7 @@
 -->

 - This PR fixes or closes issue: fixes #
- This PR is related to issue:
+- This PR is related to issue or discussion:
 - Link to documentation pull request:

 ## Checklist
@@ -1,27 +0,0 @@
-# Configuration for Lock Threads - https://github.com/dessant/lock-threads
-
-# Number of days of inactivity before a closed issue or pull request is locked
-daysUntilLock: 1
-
-# Skip issues and pull requests created before a given timestamp. Timestamp must
-# follow ISO 8601 (`YYYY-MM-DD`). Set to `false` to disable
-skipCreatedBefore: 2020-01-01
-
-# Issues and pull requests with these labels will be ignored. Set to `[]` to disable
-exemptLabels: []
-
-# Label to add before locking, such as `outdated`. Set to `false` to disable
-lockLabel: false
-
-# Comment to post before locking. Set to `false` to disable
-lockComment: false
-
-# Assign `resolved` as the reason for locking. Set to `false` to disable
-setLockReason: false
-
-# Limit to only `issues` or `pulls`
-only: pulls
-
-# Optionally, specify configuration settings just for `issues` or `pulls`
-issues:
-  daysUntilLock: 30
@@ -1,56 +0,0 @@
-# Configuration for probot-stale - https://github.com/probot/stale
-
-# Number of days of inactivity before an Issue or Pull Request becomes stale
-daysUntilStale: 90
-
-# Number of days of inactivity before an Issue or Pull Request with the stale label is closed.
-# Set to false to disable. If disabled, issues still need to be closed manually, but will remain marked as stale.
-daysUntilClose: 7
-
-# Only issues or pull requests with all of these labels are check if stale. Defaults to `[]` (disabled)
-onlyLabels: []
-
-# Issues or Pull Requests with these labels will never be considered stale. Set to `[]` to disable
-exemptLabels:
-  - feature request
-  - Help wanted
-  - to do
-
-# Set to true to ignore issues in a project (defaults to false)
-exemptProjects: true
-
-# Set to true to ignore issues in a milestone (defaults to false)
-exemptMilestones: true
-
-# Set to true to ignore issues with an assignee (defaults to false)
-exemptAssignees: false
-
-# Label to use when marking as stale
-staleLabel: stale
-
-# Comment to post when marking as stale. Set to `false` to disable
-markComment: >
-  There hasn't been any activity on this issue recently. Due to the high number
-  of incoming GitHub notifications, we have to clean some of the old issues,
-  as many of them have already been resolved with the latest updates.
-
-  Please make sure to update to the latest Home Assistant version and check
-  if that solves the issue. Let us know if that works for you by adding a
-  comment 👍
-
-  This issue now has been marked as stale and will be closed if no further
-  activity occurs. Thank you for your contributions.
-
-# Comment to post when removing the stale label.
-# unmarkComment: >
-#   Your comment here.
-
-# Comment to post when closing a stale Issue or Pull Request.
-# closeComment: >
-#   Your comment here.
-
-# Limit the number of actions per hour, from 1-30. Default is 30
-limitPerRun: 30
-
-# Limit to only `issues` or `pulls`
-only: issues
@@ -10,83 +10,64 @@ on:
      - dev
      - master

+env:
+  NODE_VERSION: 14
+  NODE_OPTIONS: --max_old_space_size=6144
+
 jobs:
  lint:
    runs-on: ubuntu-latest
    steps:
      - name: Check out files from GitHub
        uses: actions/checkout@v2
-      - name: Setting up Node.js
-        uses: actions/setup-node@v1
+      - name: Set up Node ${{ env.NODE_VERSION }}
+        uses: actions/setup-node@v2
        with:
-          node-version: 12.x
-      - name: Get yarn cache path
-        id: yarn-cache-dir-path
-        run: echo "::set-output name=dir::$(yarn cache dir)"
-      - name: Fetching Yarn cache
-        uses: actions/cache@v1
-        with:
-          path: ${{ steps.yarn-cache-dir-path.outputs.dir }}
-          key: ${{ runner.os }}-yarn-${{ hashFiles('**/yarn.lock') }}
-          restore-keys: |
-            ${{ runner.os }}-yarn-
+          node-version: ${{ env.NODE_VERSION }}
+          cache: yarn
      - name: Install dependencies
        run: yarn install
        env:
          CI: true
-      - name: Build icons
-        run: ./node_modules/.bin/gulp gen-icons-json
-      - name: Build translations
-        run: ./node_modules/.bin/gulp build-translations
+      - name: Build resources
+        run: ./node_modules/.bin/gulp gen-icons-json build-translations build-locale-data gather-gallery-demos
      - name: Run eslint
-        run: ./node_modules/.bin/eslint '{**/src,src}/**/*.{js,ts,html}' --ignore-path .gitignore
+        run: yarn run lint:eslint
      - name: Run tsc
-        run: ./node_modules/.bin/tsc
+        run: yarn run lint:types
+      - name: Run prettier
+        run: yarn run lint:prettier
+      - name: Check for duplicate dependencies
+        run: yarn dedupe --check
  test:
    runs-on: ubuntu-latest
    steps:
      - name: Check out files from GitHub
        uses: actions/checkout@v2
-      - name: Setting up Node.js
-        uses: actions/setup-node@v1
+      - name: Set up Node ${{ env.NODE_VERSION }}
+        uses: actions/setup-node@v2
        with:
-          node-version: 12.x
-      - name: Get yarn cache path
-        id: yarn-cache-dir-path
-        run: echo "::set-output name=dir::$(yarn cache dir)"
-      - name: Fetching Yarn cache
-        uses: actions/cache@v1
-        with:
-          path: ${{ steps.yarn-cache-dir-path.outputs.dir }}
-          key: ${{ runner.os }}-yarn-${{ hashFiles('**/yarn.lock') }}
-          restore-keys: |
-            ${{ runner.os }}-yarn-
+          node-version: ${{ env.NODE_VERSION }}
+          cache: yarn
      - name: Install dependencies
        run: yarn install
        env:
          CI: true
-      - name: Run Mocha
-        run: npm run mocha
+      - name: Build resources
+        run: ./node_modules/.bin/gulp build-translations build-locale-data
+      - name: Run Tests
+        run: yarn run test
  build:
    runs-on: ubuntu-latest
    needs: [lint, test]
    steps:
      - name: Check out files from GitHub
        uses: actions/checkout@v2
-      - name: Setting up Node.js
-        uses: actions/setup-node@v1
+      - name: Set up Node ${{ env.NODE_VERSION }}
+        uses: actions/setup-node@v2
        with:
-          node-version: 12.x
-      - name: Get yarn cache path
-        id: yarn-cache-dir-path
-        run: echo "::set-output name=dir::$(yarn cache dir)"
-      - name: Fetching Yarn cache
-        uses: actions/cache@v1
-        with:
-          path: ${{ steps.yarn-cache-dir-path.outputs.dir }}
-          key: ${{ runner.os }}-yarn-${{ hashFiles('**/yarn.lock') }}
-          restore-keys: |
-            ${{ runner.os }}-yarn-
+          node-version: ${{ env.NODE_VERSION }}
+          cache: yarn
      - name: Install dependencies
        run: yarn install
        env:
@@ -101,20 +82,11 @@ jobs:
    steps:
      - name: Check out files from GitHub
        uses: actions/checkout@v2
-      - name: Setting up Node.js
-        uses: actions/setup-node@v1
+      - name: Set up Node ${{ env.NODE_VERSION }}
+        uses: actions/setup-node@v2
        with:
-          node-version: 12.x
-      - name: Get yarn cache path
-        id: yarn-cache-dir-path
-        run: echo "::set-output name=dir::$(yarn cache dir)"
-      - name: Fetching Yarn cache
-        uses: actions/cache@v1
-        with:
-          path: ${{ steps.yarn-cache-dir-path.outputs.dir }}
-          key: ${{ runner.os }}-yarn-${{ hashFiles('**/yarn.lock') }}
-          restore-keys: |
-            ${{ runner.os }}-yarn-
+          node-version: ${{ env.NODE_VERSION }}
+          cache: yarn
      - name: Install dependencies
        run: yarn install
        env:
@@ -0,0 +1,60 @@
+name: "CodeQL"
+
+on:
+  push:
+    branches: [dev, master]
+  pull_request:
+    # The branches below must be a subset of the branches above
+    branches: [dev]
+
+jobs:
+  analyze:
+    name: Analyze
+    runs-on: ubuntu-latest
+
+    strategy:
+      fail-fast: false
+      matrix:
+        # Override automatic language detection by changing the below list
+        # Supported options are ['csharp', 'cpp', 'go', 'java', 'javascript', 'python']
+        language: ['javascript']
+        # Learn more...
+        # https://docs.github.com/en/github/finding-security-vulnerabilities-and-errors-in-your-code/configuring-code-scanning#overriding-automatic-language-detection
+
+    steps:
+    - name: Checkout repository
+      uses: actions/checkout@v2
+      with:
+        # We must fetch at least the immediate parents so that if this is
+        # a pull request then we can checkout the head.
+        fetch-depth: 2
+
+    # If this run was triggered by a pull request event, then checkout
+    # the head of the pull request instead of the merge commit.
+    - run: git checkout HEAD^2
+      if: ${{ github.event_name == 'pull_request' }}
+
+    # Initializes the CodeQL tools for scanning.
+    - name: Initialize CodeQL
+      uses: github/codeql-action/init@v1
+      with:
+        languages: ${{ matrix.language }}
+
+    # Autobuild attempts to build any compiled languages  (C/C++, C#, or Java).
+    # If this step fails, then you should remove it and run the build manually (see below)
+    - name: Autobuild
+      uses: github/codeql-action/autobuild@v1
+
+    # ℹ️ Command-line programs to run using the OS shell.
+    # 📚 https://git.io/JvXDl
+
+    # ✏️ If the Autobuild fails above, remove it and uncomment the following three lines
+    #    and modify them (or add more) to build your code if your project
+    #    uses a compiled language
+
+    #- run: |
+    #   make bootstrap
+    #   make release
+
+    - name: Perform CodeQL Analysis
+      uses: github/codeql-action/analyze@v1
@@ -4,26 +4,22 @@ on:
  push:
    branches:
      - dev
+
+env:
+  NODE_VERSION: 14
+  NODE_OPTIONS: --max_old_space_size=6144
+
 jobs:
  deploy:
    runs-on: ubuntu-latest
    steps:
      - name: Check out files from GitHub
        uses: actions/checkout@v2
-      - name: Setting up Node.js
-        uses: actions/setup-node@v1
+      - name: Set up Node ${{ env.NODE_VERSION }}
+        uses: actions/setup-node@v2
        with:
-          node-version: 12.x
-      - name: Get yarn cache path
-        id: yarn-cache-dir-path
-        run: echo "::set-output name=dir::$(yarn cache dir)"
-      - name: Fetching Yarn cache
-        uses: actions/cache@v1
-        with:
-          path: ${{ steps.yarn-cache-dir-path.outputs.dir }}
-          key: ${{ runner.os }}-yarn-${{ hashFiles('**/yarn.lock') }}
-          restore-keys: |
-            ${{ runner.os }}-yarn-
+          node-version: ${{ env.NODE_VERSION }}
+          cache: yarn
      - name: Install dependencies
        run: yarn install
        env:
@@ -0,0 +1,20 @@
+name: Lock
+
+# yamllint disable-line rule:truthy
+on:
+  schedule:
+    - cron: "0 * * * *"
+
+jobs:
+  lock:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: dessant/lock-threads@v2.0.1
+        with:
+          github-token: ${{ github.token }}
+          issue-lock-inactive-days: "30"
+          issue-exclude-created-before: "2020-10-01T00:00:00Z"
+          issue-lock-reason: ""
+          pr-lock-inactive-days: "1"
+          pr-exclude-created-before: "2020-11-01T00:00:00Z"
+          pr-lock-reason: ""
@@ -0,0 +1,19 @@
+name: Netlify
+
+on:
+  schedule:
+    - cron: "0 0 * * *"
+
+jobs:
+  trigger_builds:
+    name: Trigger netlify build preview
+    runs-on: "ubuntu-latest"
+    steps:
+      - name: Trigger Cast build
+        run: curl -X POST -d {} https://api.netlify.com/build_hooks/${{ secrets.NETLIFY_CAST_DEV_BUILD_HOOK }}
+
+      - name: Trigger Demo build
+        run: curl -X POST -d {} https://api.netlify.com/build_hooks/${{ secrets.NETLIFY_DEMO_DEV_BUILD_HOOK }}
+
+      - name: Trigger Gallery build
+        run: curl -X POST -d {} https://api.netlify.com/build_hooks/${{ secrets.NETLIFY_GALLERY_DEV_BUILD_HOOK }}
@@ -0,0 +1,14 @@
+name: Release Drafter
+
+on:
+  push:
+    branches:
+      - dev
+
+jobs:
+  update_release_draft:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: release-drafter/release-drafter@v5
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
@@ -0,0 +1,91 @@
+name: Release
+
+on:
+  release:
+    types:
+      - published
+
+env:
+  PYTHON_VERSION: 3.8
+  NODE_VERSION: 14
+  NODE_OPTIONS: --max_old_space_size=6144
+
+jobs:
+  release:
+    name: Release
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout the repository
+        uses: actions/checkout@v2
+
+      - name: Verify version
+        uses: home-assistant/actions/helpers/verify-version@master
+
+      - name: Set up Python ${{ env.PYTHON_VERSION }}
+        uses: actions/setup-python@v2
+        with:
+          python-version: ${{ env.PYTHON_VERSION }}
+
+      - name: Set up Node ${{ env.NODE_VERSION }}
+        uses: actions/setup-node@v2
+        with:
+          node-version: ${{ env.NODE_VERSION }}
+          cache: yarn
+
+      - name: Install dependencies
+        run: yarn install
+
+      - name: Download Translations
+        run: ./script/translations_download
+        env:
+          LOKALISE_TOKEN: ${{ secrets.LOKALISE_TOKEN }}
+      - name: Build and release package
+        run: |
+          python3 -m pip install twine
+          export TWINE_USERNAME="__token__"
+          export TWINE_PASSWORD="${{ secrets.TWINE_TOKEN }}"
+
+          script/release
+
+  wheels-init:
+    name: Init wheels build
+    needs: release
+    runs-on: ubuntu-latest
+    steps:
+      - name: Generate requirements.txt
+        run: |
+          # Sleep to give pypi time to populate the new version across mirrors
+          sleep 240
+          version=$(echo "${{ github.ref }}" | awk -F"/" '{print $NF}' )
+          echo "home-assistant-frontend==$version" > ./requirements.txt
+
+      - name: Upload requirements.txt
+        uses: actions/upload-artifact@v2
+        with:
+          name: requirements
+          path: ./requirements.txt
+
+  build-wheels:
+    name: Build wheels for ${{ matrix.arch }}
+    needs: wheels-init
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        arch: ["aarch64", "armhf", "armv7", "amd64", "i386"]
+        tag:
+          - "3.9-alpine3.14"
+    steps:
+      - name: Download requirements.txt
+        uses: actions/download-artifact@v2
+        with:
+          name: requirements
+
+      - name: Build wheels
+        uses: home-assistant/wheels@master
+        with:
+          tag: ${{ matrix.tag }}
+          arch: ${{ matrix.arch }}
+          wheels-host: ${{ secrets.WHEELS_HOST }}
+          wheels-key: ${{ secrets.WHEELS_KEY }}
+          wheels-user: wheels
+          requirements: "requirements.txt"
@@ -0,0 +1,42 @@
+name: Stale
+
+# yamllint disable-line rule:truthy
+on:
+  schedule:
+    - cron: "0 * * * *"
+
+jobs:
+  stale:
+    runs-on: ubuntu-latest
+    steps:
+      - name: 90 days stale policy
+        uses: actions/stale@v3.0.13
+        with:
+          repo-token: ${{ secrets.GITHUB_TOKEN }}
+          days-before-stale: 90
+          days-before-close: 7
+          operations-per-run: 25
+          remove-stale-when-updated: true
+          stale-issue-label: "stale"
+          exempt-issue-labels: "no-stale,Help%20wanted,help-wanted,feature-request,feature%20request"
+          stale-issue-message: >
+            There hasn't been any activity on this issue recently. Due to the
+            high number of incoming GitHub notifications, we have to clean some
+            of the old issues, as many of them have already been resolved with
+            the latest updates.
+
+            Please make sure to update to the latest Home Assistant version and
+            check if that solves the issue. Let us know if that works for you by
+            adding a comment 👍
+
+            This issue has now been marked as stale and will be closed if no
+            further activity occurs. Thank you for your contributions.
+
+          stale-pr-label: "stale"
+          exempt-pr-labels: "no-stale"
+          stale-pr-message: >
+            There hasn't been any activity on this pull request recently. This
+            pull request has been automatically marked as stale because of that
+            and will be closed if no further activity occurs within 7 days.
+
+            Thank you for your contributions.
@@ -0,0 +1,25 @@
+name: Translations
+
+on:
+  push:
+    branches:
+      - dev
+    paths:
+      - src/translations/en.json
+
+env:
+  NODE_VERSION: 14
+
+jobs:
+  upload:
+    name: Upload
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout the repository
+        uses: actions/checkout@v2
+
+      - name: Upload Translations
+        run: |
+          export LOKALISE_TOKEN="${{ secrets.LOKALISE_TOKEN }}"
+
+          ./script/translations_upload_base
@@ -1,11 +1,23 @@
-build
-build-translations/*
-node_modules/*
-npm-debug.log
 .DS_Store
-hass_frontend/*
 .reify-cache

+# build
+build
+hass_frontend/*
+dist
+
+# yarn
+.yarn/*
+!.yarn/patches
+!.yarn/releases
+!.yarn/plugins
+!.yarn/sdks
+!.yarn/versions
+.pnp.*
+node_modules/*
+yarn-error.log
+npm-debug.log
+
 # Python stuff
 *.py[cod]
 *.egg
@@ -14,22 +26,23 @@ hass_frontend/*
 # venv stuff
 pyvenv.cfg
 pip-selfcheck.json
-venv
+venv/*
 .venv
-lib
-bin
-dist

 # vscode
 .vscode/*
 !.vscode/extensions.json
+!.vscode/launch.json
+!.vscode/tasks.json

-# Cast dev settings 
+# Cast dev settings
 src/cast/dev_const.ts

 # Secrets
 .lokalise_token
-yarn-error.log

-#asdf
+# asdf
 .tool-versions
+
+# Home Assistant config
+/config
@@ -1,6 +0,0 @@
-jshint:
-  enabled: false
-
-eslint:
-  enabled: true
-  config_file: .eslintrc-hound.json
@@ -1 +1 @@
-12.1
+14
@@ -1,5 +1,4 @@
 build
-build-translations/*
 translations/*
 node_modules/*
 hass_frontend/*
@@ -0,0 +1,44 @@
+{
+  // https://github.com/microsoft/vscode-js-debug/blob/master/OPTIONS.md
+  "configurations": [
+    {
+      "name": "Debug Frontend",
+      "request": "launch",
+      "type": "pwa-chrome",
+      "url": "http://localhost:8123/",
+      "webRoot": "${workspaceFolder}/hass_frontend",
+      "disableNetworkCache": true,
+      "preLaunchTask": "Develop Frontend",
+      "outFiles": [
+        "${workspaceFolder}/hass_frontend/frontend_latest/*.js"
+      ]
+    },
+    {
+      "name": "Debug Gallery",
+      "request": "launch",
+      "type": "pwa-chrome",
+      "url": "http://localhost:8100/",
+      "webRoot": "${workspaceFolder}/gallery/dist",
+      "disableNetworkCache": true,
+      "preLaunchTask": "Develop Gallery"
+    },
+    {
+      "name": "Debug Demo",
+      "request": "launch",
+      "type": "pwa-chrome",
+      "url": "http://localhost:8090/",
+      "webRoot": "${workspaceFolder}/demo/dist",
+      "disableNetworkCache": true,
+      "preLaunchTask": "Develop Demo"
+    },
+    {
+      "name": "Debug Cast",
+      "request": "launch",
+      "type": "pwa-chrome",
+      "url": "http://localhost:8080/",
+      "webRoot": "${workspaceFolder}/cast/dist",
+      "disableNetworkCache": true,
+      "preLaunchTask": "Develop Cast"
+    },
+  ]
+}
@@ -0,0 +1,208 @@
+{
+  "version": "2.0.0",
+  "tasks": [
+    {
+      "label": "Develop Frontend",
+      "type": "gulp",
+      "task": "develop-app",
+      // Sync changes here to other tasks until issue resolved
+      // https://github.com/Microsoft/vscode/issues/61497
+      "problemMatcher": {
+        "owner": "ha-build",
+        "source": "ha-build",
+        "fileLocation": "absolute",
+        "severity": "error",
+        "pattern": [
+          {
+            "regexp": "(SyntaxError): (.+): (.+) \\((\\d+):(\\d+)\\)",
+            "severity": 1,
+            "file": 2,
+            "message": 3,
+            "line": 4,
+            "column": 5
+          }
+        ],
+        "background": {
+          "activeOnStart": true,
+          "beginsPattern": "Changes detected. Starting compilation",
+          "endsPattern": "Build done @"
+        }
+      },
+      "isBackground": true,
+      "group": {
+        "kind": "build",
+        "isDefault": true
+      },
+      "runOptions": {
+        "instanceLimit": 1
+      }
+    },
+    {
+      "label": "Develop Supervisor panel",
+      "type": "gulp",
+      "task": "develop-hassio",
+      "problemMatcher": {
+        "owner": "ha-build",
+        "source": "ha-build",
+        "fileLocation": "absolute",
+        "severity": "error",
+        "pattern": [
+          {
+            "regexp": "(SyntaxError): (.+): (.+) \\((\\d+):(\\d+)\\)",
+            "severity": 1,
+            "file": 2,
+            "message": 3,
+            "line": 4,
+            "column": 5
+          }
+        ],
+        "background": {
+          "activeOnStart": true,
+          "beginsPattern": "Changes detected. Starting compilation",
+          "endsPattern": "Build done @"
+        }
+      },
+      "isBackground": true,
+      "group": "build",
+      "runOptions": {
+        "instanceLimit": 1
+      }
+    },
+    {
+      "label": "Develop Gallery",
+      "type": "gulp",
+      "task": "develop-gallery",
+      "problemMatcher": {
+        "owner": "ha-build",
+        "source": "ha-build",
+        "fileLocation": "absolute",
+        "severity": "error",
+        "pattern": [
+          {
+            "regexp": "(SyntaxError): (.+): (.+) \\((\\d+):(\\d+)\\)",
+            "severity": 1,
+            "file": 2,
+            "message": 3,
+            "line": 4,
+            "column": 5
+          }
+        ],
+        "background": {
+          "activeOnStart": true,
+          "beginsPattern": "Changes detected. Starting compilation",
+          "endsPattern": "Build done @"
+        }
+      },
+
+      "isBackground": true,
+      "group": "build",
+      "runOptions": {
+        "instanceLimit": 1
+      }
+    },
+    {
+      "label": "Develop Demo",
+      "type": "gulp",
+      "task": "develop-demo",
+      "problemMatcher": {
+        "owner": "ha-build",
+        "source": "ha-build",
+        "fileLocation": "absolute",
+        "severity": "error",
+        "pattern": [
+          {
+            "regexp": "(SyntaxError): (.+): (.+) \\((\\d+):(\\d+)\\)",
+            "severity": 1,
+            "file": 2,
+            "message": 3,
+            "line": 4,
+            "column": 5
+          }
+        ],
+        "background": {
+          "activeOnStart": true,
+          "beginsPattern": "Changes detected. Starting compilation",
+          "endsPattern": "Build done @"
+        }
+      },
+
+      "isBackground": true,
+      "group": "build",
+      "runOptions": {
+        "instanceLimit": 1
+      }
+    },
+    {
+      "label": "Develop Cast",
+      "type": "gulp",
+      "task": "develop-cast",
+      "problemMatcher": {
+        "owner": "ha-build",
+        "source": "ha-build",
+        "fileLocation": "absolute",
+        "severity": "error",
+        "pattern": [
+          {
+            "regexp": "(SyntaxError): (.+): (.+) \\((\\d+):(\\d+)\\)",
+            "severity": 1,
+            "file": 2,
+            "message": 3,
+            "line": 4,
+            "column": 5
+          }
+        ],
+        "background": {
+          "activeOnStart": true,
+          "beginsPattern": "Changes detected. Starting compilation",
+          "endsPattern": "Build done @"
+        }
+      },
+
+      "isBackground": true,
+      "group": "build",
+      "runOptions": {
+        "instanceLimit": 1
+      }
+    },
+    {
+      "label": "Run HA Core in devcontainer",
+      "type": "shell",
+      "command": "script/core",
+      "isBackground": true,
+      "group": {
+        "kind": "build",
+        "isDefault": true
+      },
+      "problemMatcher": [],
+      "runOptions": {
+        "instanceLimit": 1
+      }
+    },
+    {
+      "label": "Run HA Core for Supervisor in devcontainer",
+      "type": "shell",
+      "command": "HASSIO=${input:supervisorHost} HASSIO_TOKEN=${input:supervisorToken} script/core",
+      "isBackground": true,
+      "group": {
+        "kind": "build",
+        "isDefault": true
+      },
+      "problemMatcher": [],
+      "runOptions": {
+        "instanceLimit": 1
+      }
+    }
+  ],
+  "inputs": [
+    {
+      "id": "supervisorHost",
+      "type": "promptString",
+      "description": "The IP of the Supervisor host running the Remote API proxy add-on"
+    },
+    {
+      "id": "supervisorToken",
+      "type": "promptString",
+      "description": "The token for the Remote API proxy add-on"
+    }
+  ]
+}
@@ -0,0 +1,29 @@
+diff --git a/lib/uni-virtualizer/lib/polyfillLoaders/EventTarget.js b/lib/uni-virtualizer/lib/polyfillLoaders/EventTarget.js
+index d92179f7fd5315203f870a6963e871dc8ddf6c0c..362e284121b97e0fba0925225777aebc32e26b8d 100644
+--- a/lib/uni-virtualizer/lib/polyfillLoaders/EventTarget.js
+++ b/lib/uni-virtualizer/lib/polyfillLoaders/EventTarget.js
+@@ -1,14 +1,15 @@
+-let _ET, ET;
+let _ET;
+let ET;
+ export default async function EventTarget() {
+-    return ET || init();
+  return ET || init();
+ }
+ async function init() {
+-    _ET = window.EventTarget;
+-    try {
+-        new _ET();
+-    }
+-    catch (_a) {
+-        _ET = (await import('event-target-shim')).EventTarget;
+-    }
+-    return (ET = _ET);
+  _ET = window.EventTarget;
+  try {
+    new _ET();
+  } catch (_a) {
+    _ET = (await import("event-target-shim")).default.EventTarget;
+  }
+  return (ET = _ET);
+ }
@@ -0,0 +1,12 @@
+diff --git a/mwc-icon-button-base.js b/mwc-icon-button-base.js
+index 45cdaab93ccc0a6daaaaabc01266dcdc32e46bfd..b3ea5b541597308d85f86ce6c23fd00785fda835 100644
+--- a/mwc-icon-button-base.js
+++ b/mwc-icon-button-base.js
+@@ -63,7 +63,6 @@ export class IconButtonBase extends LitElement {
+         @touchend="${this.handleRippleDeactivate}"
+         @touchcancel="${this.handleRippleDeactivate}"
+     >${this.renderRipple()}
+-    <i class="material-icons">${this.icon}</i>
+     <span
+       ><slot></slot
+     ></span>
@@ -0,0 +1,34 @@
+diff --git a/lib/legacy/class.js b/lib/legacy/class.js
+index aee2511be1cd9bf900ee552bc98190c1631c57c0..f2f499d68bf52034cac9c28307c99e8ce6b8417d 100644
+--- a/lib/legacy/class.js
+++ b/lib/legacy/class.js
+@@ -304,17 +304,23 @@ function GenerateClassFromInfo(info, Base, behaviors) {
+       // only proceed if the generated class' prototype has not been registered.
+       const generatedProto = PolymerGenerated.prototype;
+       if (!generatedProto.hasOwnProperty(JSCompiler_renameProperty('__hasRegisterFinished', generatedProto))) {
+-        generatedProto.__hasRegisterFinished = true;
+        // make sure legacy lifecycle is called on the *element*'s prototype
+        // and not the generated class prototype; if the element has been
+        // extended, these are *not* the same.
+        const proto = Object.getPrototypeOf(this);
+        // Only set flag when generated prototype itself is registered,
+        // as this element may be extended from, and needs to run `registered`
+        // on all behaviors on the subclass as well.
+        if (proto === generatedProto) {
+          generatedProto.__hasRegisterFinished = true;
+        }
+         // ensure superclass is registered first.
+         super._registered();
+         // copy properties onto the generated class lazily if we're optimizing,
+-        if (legacyOptimizations) {
+        if (legacyOptimizations && !Object.hasOwnProperty(generatedProto, '__hasCopiedProperties')) {
+          generatedProto.__hasCopiedProperties = true;
+           copyPropertiesToProto(generatedProto);
+         }
+-        // make sure legacy lifecycle is called on the *element*'s prototype
+-        // and not the generated class prototype; if the element has been
+-        // extended, these are *not* the same.
+-        const proto = Object.getPrototypeOf(this);
+         let list = lifecycle.beforeRegister;
+         if (list) {
+           for (let i=0; i < list.length; i++) {
@@ -0,0 +1,9 @@
+nodeLinker: node-modules
+
+plugins:
+  - path: .yarn/plugins/@yarnpkg/plugin-typescript.cjs
+    spec: "@yarnpkg/plugin-typescript"
+  - path: .yarn/plugins/@yarnpkg/plugin-interactive-tools.cjs
+    spec: "@yarnpkg/plugin-interactive-tools"
+
+yarnPath: .yarn/releases/yarn-3.0.2.cjs
@@ -2,79 +2,139 @@

 ## Our Pledge

-In the interest of fostering an open and welcoming environment, we as
-contributors and maintainers pledge to making participation in our project and
-our community a harassment-free experience for everyone, regardless of age, body
-size, disability, ethnicity, gender identity and expression, level of experience,
-nationality, personal appearance, race, religion, or sexual identity and
-orientation.
+We as members, contributors, and leaders pledge to make participation in our
+community a harassment-free experience for everyone, regardless of age, body
+size, visible or invisible disability, ethnicity, sex characteristics, gender
+identity and expression, level of experience, education, socio-economic status,
+nationality, personal appearance, race, religion, or sexual identity
+and orientation.
+
+We pledge to act and interact in ways that contribute to an open, welcoming,
+diverse, inclusive, and healthy community.

 ## Our Standards

-Examples of behavior that contributes to creating a positive environment
-include:
+Examples of behavior that contributes to a positive environment for our
+community include:

-* Using welcoming and inclusive language
-* Being respectful of differing viewpoints and experiences
-* Gracefully accepting constructive criticism
-* Focusing on what is best for the community
-* Showing empathy towards other community members
+* Demonstrating empathy and kindness toward other people
+* Being respectful of differing opinions, viewpoints, and experiences
+* Giving and gracefully accepting constructive feedback
+* Accepting responsibility and apologizing to those affected by our mistakes,
+  and learning from the experience
+* Focusing on what is best not just for us as individuals, but for the
+  overall community

-Examples of unacceptable behavior by participants include:
+Examples of unacceptable behavior include:

-* The use of sexualized language or imagery and unwelcome sexual attention or
-advances
-* Trolling, insulting/derogatory comments, and personal or political attacks
+* The use of sexualized language or imagery, and sexual attention or
+  advances of any kind
+* Trolling, insulting or derogatory comments, and personal or political attacks
 * Public or private harassment
-* Publishing others' private information, such as a physical or electronic
-  address, without explicit permission
+* Publishing others' private information, such as a physical or email
+  address, without their explicit permission
 * Other conduct which could reasonably be considered inappropriate in a
  professional setting

-## Our Responsibilities
+## Enforcement Responsibilities

-Project maintainers are responsible for clarifying the standards of acceptable
-behavior and are expected to take appropriate and fair corrective action in
-response to any instances of unacceptable behavior.
+Community leaders are responsible for clarifying and enforcing our standards of
+acceptable behavior and will take appropriate and fair corrective action in
+response to any behavior that they deem inappropriate, threatening, offensive,
+or harmful.

-Project maintainers have the right and responsibility to remove, edit, or
-reject comments, commits, code, wiki edits, issues, and other contributions
-that are not aligned to this Code of Conduct, or to ban temporarily or
-permanently any contributor for other behaviors that they deem inappropriate,
-threatening, offensive, or harmful.
+Community leaders have the right and responsibility to remove, edit, or reject
+comments, commits, code, wiki edits, issues, and other contributions that are
+not aligned to this Code of Conduct, and will communicate reasons for moderation
+decisions when appropriate.

 ## Scope

-This Code of Conduct applies both within project spaces and in public spaces
-when an individual is representing the project or its community. Examples of
-representing a project or community include using an official project e-mail
-address, posting via an official social media account, or acting as an appointed
-representative at an online or offline event. Representation of a project may be
-further defined and clarified by project maintainers.
+This Code of Conduct applies within all community spaces, and also applies when
+an individual is officially representing the community in public spaces.
+Examples of representing our community include using an official e-mail address,
+posting via an official social media account, or acting as an appointed
+representative at an online or offline event.

 ## Enforcement

 Instances of abusive, harassing, or otherwise unacceptable behavior may be
-reported by contacting the project team at [safety@home-assistant.io][email]. All
-complaints will be reviewed and investigated and will result in a response that
-is deemed necessary and appropriate to the circumstances. The project team is
-obligated to maintain confidentiality with regard to the reporter of an incident.
-Further details of specific enforcement policies may be posted separately.
+reported to the community leaders responsible for enforcement at
+[safety@home-assistant.io][email] or by using the report/flag feature of
+the medium used. All complaints will be reviewed and investigated promptly and
+fairly.

-Project maintainers who do not follow or enforce the Code of Conduct in good
-faith may face temporary or permanent repercussions as determined by other
-members of the project's leadership.
+All community leaders are obligated to respect the privacy and security of the
+reporter of any incident.
+
+## Enforcement Guidelines
+
+Community leaders will follow these Community Impact Guidelines in determining
+the consequences for any action they deem in violation of this Code of Conduct:
+
+### 1. Correction
+
+**Community Impact**: Use of inappropriate language or other behavior deemed
+unprofessional or unwelcome in the community.
+
+**Consequence**: A private, written warning from community leaders, providing
+clarity around the nature of the violation and an explanation of why the
+behavior was inappropriate. A public apology may be requested.
+
+### 2. Warning
+
+**Community Impact**: A violation through a single incident or series
+of actions.
+
+**Consequence**: A warning with consequences for continued behavior. No
+interaction with the people involved, including unsolicited interaction with
+those enforcing the Code of Conduct, for a specified period of time. This
+includes avoiding interactions in community spaces as well as external channels
+like social media. Violating these terms may lead to a temporary or
+permanent ban.
+
+### 3. Temporary Ban
+
+**Community Impact**: A serious violation of community standards, including
+sustained inappropriate behavior.
+
+**Consequence**: A temporary ban from any sort of interaction or public
+communication with the community for a specified period of time. No public or
+private interaction with the people involved, including unsolicited interaction
+with those enforcing the Code of Conduct, is allowed during this period.
+Violating these terms may lead to a permanent ban.
+
+### 4. Permanent Ban
+
+**Community Impact**: Demonstrating a pattern of violation of community
+standards, including sustained inappropriate behavior,  harassment of an
+individual, or aggression toward or disparagement of classes of individuals.
+
+**Consequence**: A permanent ban from any sort of public interaction within
+the community.

 ## Attribution

-This Code of Conduct is adapted from the [Contributor Covenant][homepage], version 1.4,
-available [here][version].
+This Code of Conduct is adapted from the [Contributor Covenant][homepage],
+version 2.0, available [here][version].
+
+Community Impact Guidelines were inspired by [Mozilla's code of conduct
+enforcement ladder][mozilla].

 ## Adoption

-This Code of Conduct was first adopted January 21st, 2017 and announced in [this][coc-blog] blog post.
+This Code of Conduct was first adopted January 21st, 2017 and announced in
+[this][coc-blog] blog post and has been updated on May 25th, 2020 to version
+2.0 of the [Contributor Covenant][homepage] as announced in [this][coc2-blog]
+blog post.

-[homepage]: http://contributor-covenant.org
-[version]: http://contributor-covenant.org/version/1/4/
+For answers to common questions about this code of conduct, see the FAQ at
+<https://www.contributor-covenant.org/faq>. Translations are available at
+<https://www.contributor-covenant.org/translations>.
+
+[coc-blog]: /blog/2017/01/21/home-assistant-governance/
+[coc2-blog]: /blog/2020/05/25/code-of-conduct-updated/
 [email]: mailto:safety@home-assistant.io
-[coc-blog]: https://home-assistant.io/blog/2017/01/21/home-assistant-governance/
+[homepage]: http://contributor-covenant.org
+[mozilla]: https://github.com/mozilla/diversity
+[version]: https://www.contributor-covenant.org/version/2/0/code_of_conduct.html
@@ -1,31 +0,0 @@
-FROM node:8.11.1-alpine
-
-# install yarn
-ENV PATH /root/.yarn/bin:$PATH
-
-## Install/force base tools
-RUN apk update \
-  && apk add make g++ curl bash binutils tar git python2 python3 \
-  && rm -rf /var/cache/apk/* \
-  && /bin/bash \
-  && touch ~/.bashrc
-
-## Install yarn
-RUN curl -o- -L https://yarnpkg.com/install.sh | bash
-
-## Setup the project
-RUN mkdir -p /frontend
-
-WORKDIR /frontend
-
-COPY package.json yarn.lock ./
-
-RUN yarn install --frozen-lockfile
-
-COPY . .
-
-COPY script/docker_entrypoint.sh /usr/bin/docker_entrypoint.sh
-
-RUN chmod +x /usr/bin/docker_entrypoint.sh
-
-CMD [ "docker_entrypoint.sh" ]
@@ -14,7 +14,7 @@ This is the repository for the official [Home Assistant](https://home-assistant.
 - Development: [Instructions](https://developers.home-assistant.io/docs/frontend/development/)
 - Production build: `script/build_frontend`
 - Gallery: `cd gallery && script/develop_gallery`
- Hass.io: [Instructions](https://developers.home-assistant.io/docs/en/hassio_hass.html)
+- Supervisor: [Instructions](https://developers.home-assistant.io/docs/supervisor/developing)

 ## Frontend development

@@ -22,17 +22,8 @@ This is the repository for the official [Home Assistant](https://home-assistant.

 A complete guide can be found at the following [link](https://www.home-assistant.io/developers/frontend/). It describes a short guide for the build of project.

-### Docker environment
-
-It is possible to compile the project and/or run commands in the development environment having only the [Docker](https://www.docker.com) pre-installed in the system. On the root of project you can do:
-
- `sh ./script/docker_run.sh build` Build all the project with one command
- `sh ./script/docker_run.sh bash` Open an interactive shell (the same environment generated by the _classic environment_) where you can run commands. This bash work on your project directory and any change on your file is automatically present within your build bash.
-
-**Note**: if you have installed `npm` in addition to the `docker`, you can use the commands `npm run docker_build` and `npm run bash` to get a full build or bash as explained above
-
 ## License

 Home Assistant is open-source and Apache 2 licensed. Feel free to browse the repository, learn and reuse parts in your own projects.

-We use [BrowserStack](https://www.browserstack.com) to test Home Assistant on a large variation of devices.
+We use [BrowserStack](https://www.browserstack.com) to test Home Assistant on a large variety of devices.
@@ -1,30 +0,0 @@
-# https://dev.azure.com/home-assistant
-
-trigger: none
-pr: none
-schedules:
-  - cron: "0 0 * * *"
-    displayName: "build preview"
-    branches:
-      include:
-      - dev
-    always: true
-variables:
-  - group: netlify
-
-jobs:
-
- job: 'Netlify_preview'
-  pool:
-    vmImage: 'ubuntu-latest'
-  steps:
-  - script: |
-      # Cast
-      curl -X POST -d {} https://api.netlify.com/build_hooks/${NETLIFY_CAST}
-
-      # Demo
-      curl -X POST -d {} https://api.netlify.com/build_hooks/${NETLIFY_DEMO}
-
-      # Gallery
-      curl -X POST -d {} https://api.netlify.com/build_hooks/${NETLIFY_GALLERY}
-    displayName: 'Trigger netlify build preview'
@@ -1,59 +0,0 @@
-# https://dev.azure.com/home-assistant
-
-trigger:
-  batch: true
-  tags:
-    include:
-      - "*"
-pr: none
-variables:
-  - name: versionWheels
-    value: '1.10.1-3.7-alpine3.11'
-  - name: versionNode
-    value: '12.1'
-  - group: twine
-resources:
-  repositories:
-    - repository: azure
-      type: github
-      name: 'home-assistant/ci-azure'
-      endpoint: 'home-assistant'
-
-
-stages:
-  - stage: "Validate"
-    jobs:
-    - template: templates/azp-job-version.yaml@azure
-
-  - stage: "Build"
-    jobs:
-      - job: "ReleasePython"
-        pool:
-          vmImage: "ubuntu-latest"
-        steps:
-          - task: UsePythonVersion@0
-            displayName: "Use Python 3.7"
-            inputs:
-              versionSpec: "3.7"
-          - task: NodeTool@0
-            displayName: "Use Node $(versionNode)"
-            inputs:
-              versionSpec: "$(versionNode)"
-          - script: pip install twine wheel
-            displayName: "Install tools"
-          - script: |
-              export TWINE_USERNAME="$(twineUser)"
-              export TWINE_PASSWORD="$(twinePassword)"
-
-              script/release
-            displayName: "Build and release package"
-  - stage: "Wheels"
-    jobs:
-      - template: templates/azp-job-wheels.yaml@azure
-        parameters:
-          builderVersion: '$(versionWheels)'
-          wheelsRequirement: 'requirement.txt'
-          preBuild:
-          - script: |
-              sleep 240
-              echo "home-assistant-frontend==$(Build.SourceBranchName)" > requirement.txt
@@ -1,70 +0,0 @@
-# https://dev.azure.com/home-assistant
-
-trigger:
-  batch: true
-  branches:
-    include:
-    - dev
-  paths:
-    include:
-    - translations/en.json
-pr: none
-schedules:
-  - cron: "30 0 * * *"
-    displayName: "frontend translation update"
-    branches:
-      include:
-      - dev
-    always: true
-variables:
- group: translation
-resources:
-  repositories:
-  - repository: azure
-    type: github
-    name: 'home-assistant/ci-azure'
-    endpoint: 'home-assistant'
-
-
-jobs:
-
- job: 'Upload'
-  pool:
-    vmImage: 'ubuntu-latest'
-  steps:
-  - task: NodeTool@0
-    displayName: 'Use Node 12.x'
-    inputs:
-      versionSpec: '12.x'
-  - script: |
-      export LOKALISE_TOKEN="$(lokaliseToken)"
-      export AZURE_BRANCH="$(Build.SourceBranchName)"
-
-      ./script/translations_upload_base
-    displayName: 'Upload Translation'
-
- job: 'Download'
-  dependsOn:
-  - 'Upload'
-  condition: or(eq(variables['Build.Reason'], 'Schedule'), eq(variables['Build.Reason'], 'Manual'))
-  pool:
-    vmImage: 'ubuntu-latest'
-  steps:
-  - task: NodeTool@0
-    displayName: 'Use Node 12.x'
-    inputs:
-      versionSpec: '12.x'
-  - template: templates/azp-step-git-init.yaml@azure
-  - script: |
-      export LOKALISE_TOKEN="$(lokaliseToken)"
-      export AZURE_BRANCH="$(Build.SourceBranchName)"
-
-      npm install
-      ./script/translations_download
-    displayName: 'Download Translation'
-  - script: |
-      git checkout dev
-      git add translation
-      git commit -am "[ci skip] Translation update"
-      git push
-    displayName: 'Update translation'
@@ -0,0 +1,39 @@
+# Bundling Home Assistant Frontend
+
+The Home Assistant build pipeline contains various steps to prepare a build.
+
+- Generating icon files to be included
+- Generating translation files to be included
+- Converting TypeScript, CSS and JSON files to JavaScript
+- Bundling
+- Minifying the files
+- Generating the HTML entrypoint files
+- Generating the service worker
+- Compressing the files
+
+## Converting files
+
+Currently in Home Assistant we use a bundler to convert TypeScript, CSS and JSON files to JavaScript files that the browser understands.
+
+We currently rely on Webpack but also have experimental Rollup support. Both of these programs bundle the converted files in both production and development.
+
+For development, bundling is optional. We just want to get the right files in the browser.
+
+Responsibilities of the converter during development:
+
+- Convert TypeScript to JavaScript
+- Convert CSS to JavaScript that sets the content as the default export
+- Convert JSON to JavaScript that sets the content as the default export
+- Make sure import, dynamic import and web worker references work
+  - Add extensions where missing
+  - Resolve absolute package imports
+- Filter out specific imports/packages
+- Replace constants with values
+
+In production, the following responsibilities are added:
+
+- Minify HTML
+- Bundle multiple imports so that the browser can fetch less files
+- Generate a second version that is ES5 compatible
+
+Configuration for all these steps are specified in [bundle.js](bundle.js).
@@ -0,0 +1,170 @@
+/* eslint-disable @typescript-eslint/no-var-requires */
+const path = require("path");
+
+// Currently only supports CommonJS modules, as require is synchronous. `import` would need babel running asynchronous.
+module.exports = function inlineConstants(babel, options, cwd) {
+  const t = babel.types;
+
+  if (!Array.isArray(options.modules)) {
+    throw new TypeError(
+      "babel-plugin-inline-constants: expected a `modules` array to be passed"
+    );
+  }
+
+  if (options.resolveExtensions && !Array.isArray(options.resolveExtensions)) {
+    throw new TypeError(
+      "babel-plugin-inline-constants: expected `resolveExtensions` to be an array"
+    );
+  }
+
+  const ignoreModuleNotFound = options.ignoreModuleNotFound;
+  const resolveExtensions = options.resolveExtensions;
+
+  const hasRelativeModules = options.modules.some(
+    (module) => module.startsWith(".") || module.startsWith("/")
+  );
+
+  const modules = Object.fromEntries(
+    options.modules.map((module) => {
+      const absolute = module.startsWith(".")
+        ? require.resolve(module, { paths: [cwd] })
+        : module;
+      // eslint-disable-next-line import/no-dynamic-require
+      return [absolute, require(absolute)];
+    })
+  );
+
+  const toLiteral = (value) => {
+    if (typeof value === "string") {
+      return t.stringLiteral(value);
+    }
+
+    if (typeof value === "number") {
+      return t.numericLiteral(value);
+    }
+
+    if (typeof value === "boolean") {
+      return t.booleanLiteral(value);
+    }
+
+    if (value === null) {
+      return t.nullLiteral();
+    }
+
+    throw new Error(
+      "babel-plugin-inline-constants: cannot handle non-literal `" + value + "`"
+    );
+  };
+
+  const resolveAbsolute = (value, state, resolveExtensionIndex) => {
+    if (!state.filename) {
+      throw new TypeError(
+        "babel-plugin-inline-constants: expected a `filename` to be set for files"
+      );
+    }
+
+    if (resolveExtensions && resolveExtensionIndex !== undefined) {
+      value += resolveExtensions[resolveExtensionIndex];
+    }
+
+    try {
+      return require.resolve(value, { paths: [path.dirname(state.filename)] });
+    } catch (error) {
+      if (
+        error.code === "MODULE_NOT_FOUND" &&
+        resolveExtensions &&
+        (resolveExtensionIndex === undefined ||
+          resolveExtensionIndex < resolveExtensions.length - 1)
+      ) {
+        const resolveExtensionIdx = (resolveExtensionIndex || -1) + 1;
+        return resolveAbsolute(value, state, resolveExtensionIdx);
+      }
+
+      if (error.code === "MODULE_NOT_FOUND" && ignoreModuleNotFound) {
+        return undefined;
+      }
+      throw error;
+    }
+  };
+
+  const importDeclaration = (p, state) => {
+    if (p.node.type !== "ImportDeclaration") {
+      return;
+    }
+    const absolute =
+      hasRelativeModules && p.node.source.value.startsWith(".")
+        ? resolveAbsolute(p.node.source.value, state)
+        : p.node.source.value;
+
+    if (!absolute || !(absolute in modules)) {
+      return;
+    }
+
+    const module = modules[absolute];
+
+    for (const specifier of p.node.specifiers) {
+      if (
+        specifier.type === "ImportDefaultSpecifier" &&
+        specifier.local &&
+        specifier.local.type === "Identifier"
+      ) {
+        if (!("default" in module)) {
+          throw new Error(
+            "babel-plugin-inline-constants: cannot access default export from `" +
+              p.node.source.value +
+              "`"
+          );
+        }
+
+        const variableValue = toLiteral(module.default);
+        const variable = t.variableDeclarator(
+          t.identifier(specifier.local.name),
+          variableValue
+        );
+
+        p.insertBefore({
+          type: "VariableDeclaration",
+          kind: "const",
+          declarations: [variable],
+        });
+      } else if (
+        specifier.type === "ImportSpecifier" &&
+        specifier.imported &&
+        specifier.imported.type === "Identifier" &&
+        specifier.local &&
+        specifier.local.type === "Identifier"
+      ) {
+        if (!(specifier.imported.name in module)) {
+          throw new Error(
+            "babel-plugin-inline-constants: cannot access `" +
+              specifier.imported.name +
+              "` from `" +
+              p.node.source.value +
+              "`"
+          );
+        }
+
+        const variableValue = toLiteral(module[specifier.imported.name]);
+        const variable = t.variableDeclarator(
+          t.identifier(specifier.local.name),
+          variableValue
+        );
+
+        p.insertBefore({
+          type: "VariableDeclaration",
+          kind: "const",
+          declarations: [variable],
+        });
+      } else {
+        throw new Error("Cannot handle specifier `" + specifier.type + "`");
+      }
+    }
+    p.remove();
+  };
+
+  return {
+    visitor: {
+      ImportDeclaration: importDeclaration,
+    },
+  };
+};
@@ -1,39 +0,0 @@
-const options = ({ latestBuild }) => ({
-  presets: [
-    !latestBuild && [require("@babel/preset-env").default, { modules: false }],
-    require("@babel/preset-typescript").default,
-  ].filter(Boolean),
-  plugins: [
-    // Part of ES2018. Converts {...a, b: 2} to Object.assign({}, a, {b: 2})
-    [
-      "@babel/plugin-proposal-object-rest-spread",
-      { loose: true, useBuiltIns: true },
-    ],
-    // Only support the syntax, Webpack will handle it.
-    "@babel/syntax-dynamic-import",
-    "@babel/plugin-proposal-optional-chaining",
-    "@babel/plugin-proposal-nullish-coalescing-operator",
-    [
-      require("@babel/plugin-proposal-decorators").default,
-      { decoratorsBeforeExport: true },
-    ],
-    [
-      require("@babel/plugin-proposal-class-properties").default,
-      { loose: true },
-    ],
-  ],
-});
-
-module.exports.babelLoaderConfig = ({ latestBuild }) => {
-  if (latestBuild === undefined) {
-    throw Error("latestBuild not defined for babel loader config");
-  }
-  return {
-    test: /\.m?js$|\.tsx?$/,
-    exclude: [require.resolve("@mdi/js/mdi.js"), require.resolve("hls.js")],
-    use: {
-      loader: "babel-loader",
-      options: options({ latestBuild }),
-    },
-  };
-};
@@ -0,0 +1,219 @@
+/* eslint-disable @typescript-eslint/no-var-requires */
+const path = require("path");
+const env = require("./env.js");
+const paths = require("./paths.js");
+
+// Files from NPM Packages that should not be imported
+module.exports.ignorePackages = ({ latestBuild }) => [
+  // Part of yaml.js and only used for !!js functions that we don't use
+  require.resolve("esprima"),
+];
+
+// Files from NPM packages that we should replace with empty file
+module.exports.emptyPackages = ({ latestBuild }) =>
+  [
+    // Contains all color definitions for all material color sets.
+    // We don't use it
+    require.resolve("@polymer/paper-styles/color.js"),
+    require.resolve("@polymer/paper-styles/default-theme.js"),
+    // Loads stuff from a CDN
+    require.resolve("@polymer/font-roboto/roboto.js"),
+    require.resolve("@vaadin/vaadin-material-styles/typography.js"),
+    require.resolve("@vaadin/vaadin-material-styles/font-icons.js"),
+    // Compatibility not needed for latest builds
+    latestBuild &&
+      // wrapped in require.resolve so it blows up if file no longer exists
+      require.resolve(
+        path.resolve(paths.polymer_dir, "src/resources/compatibility.ts")
+      ),
+    // This polyfill is loaded in workers to support ES5, filter it out.
+    latestBuild && require.resolve("proxy-polyfill/src/index.js"),
+  ].filter(Boolean);
+
+module.exports.definedVars = ({ isProdBuild, latestBuild, defineOverlay }) => ({
+  __DEV__: !isProdBuild,
+  __BUILD__: JSON.stringify(latestBuild ? "latest" : "es5"),
+  __VERSION__: JSON.stringify(env.version()),
+  __DEMO__: false,
+  __SUPERVISOR__: false,
+  __BACKWARDS_COMPAT__: false,
+  __STATIC_PATH__: "/static/",
+  "process.env.NODE_ENV": JSON.stringify(
+    isProdBuild ? "production" : "development"
+  ),
+  ...defineOverlay,
+});
+
+module.exports.terserOptions = (latestBuild) => ({
+  safari10: !latestBuild,
+  ecma: latestBuild ? undefined : 5,
+  output: { comments: false },
+});
+
+module.exports.babelOptions = ({ latestBuild }) => ({
+  babelrc: false,
+  compact: false,
+  presets: [
+    !latestBuild && [
+      "@babel/preset-env",
+      {
+        useBuiltIns: "entry",
+        corejs: "3.15",
+        bugfixes: true,
+      },
+    ],
+    "@babel/preset-typescript",
+  ].filter(Boolean),
+  plugins: [
+    [
+      path.resolve(
+        paths.polymer_dir,
+        "build-scripts/babel-plugins/inline-constants-plugin.js"
+      ),
+      {
+        modules: ["@mdi/js"],
+        ignoreModuleNotFound: true,
+      },
+    ],
+    // Part of ES2018. Converts {...a, b: 2} to Object.assign({}, a, {b: 2})
+    !latestBuild && [
+      "@babel/plugin-proposal-object-rest-spread",
+      { loose: true, useBuiltIns: true },
+    ],
+    // Only support the syntax, Webpack will handle it.
+    "@babel/plugin-syntax-import-meta",
+    "@babel/plugin-syntax-dynamic-import",
+    "@babel/plugin-syntax-top-level-await",
+    "@babel/plugin-proposal-optional-chaining",
+    "@babel/plugin-proposal-nullish-coalescing-operator",
+    ["@babel/plugin-proposal-decorators", { decoratorsBeforeExport: true }],
+    ["@babel/plugin-proposal-private-methods", { loose: true }],
+    ["@babel/plugin-proposal-private-property-in-object", { loose: true }],
+    ["@babel/plugin-proposal-class-properties", { loose: true }],
+  ].filter(Boolean),
+  exclude: [
+    // \\ for Windows, / for Mac OS and Linux
+    /node_modules[\\/]core-js/,
+    /node_modules[\\/]webpack[\\/]buildin/,
+  ],
+});
+
+const outputPath = (outputRoot, latestBuild) =>
+  path.resolve(outputRoot, latestBuild ? "frontend_latest" : "frontend_es5");
+
+const publicPath = (latestBuild, root = "") =>
+  latestBuild ? `${root}/frontend_latest/` : `${root}/frontend_es5/`;
+
+/*
+BundleConfig {
+  // Object with entrypoints that need to be bundled
+  entry: { [name: string]: pathToFile },
+  // Folder where bundled files need to be written
+  outputPath: string,
+  // absolute url-path where bundled files can be found
+  publicPath: string,
+  // extra definitions that we need to replace in source
+  defineOverlay: {[name: string]: value },
+  // if this is a production build
+  isProdBuild: boolean,
+  // If we're targeting latest browsers
+  latestBuild: boolean,
+  // If we're doing a stats build (create nice chunk names)
+  isStatsBuild: boolean,
+  // Names of entrypoints that should not be hashed
+  dontHash: Set<string>
+}
+*/
+
+module.exports.config = {
+  app({ isProdBuild, latestBuild, isStatsBuild, isWDS }) {
+    return {
+      entry: {
+        service_worker: "./src/entrypoints/service_worker.ts",
+        app: "./src/entrypoints/app.ts",
+        authorize: "./src/entrypoints/authorize.ts",
+        onboarding: "./src/entrypoints/onboarding.ts",
+        core: "./src/entrypoints/core.ts",
+        "custom-panel": "./src/entrypoints/custom-panel.ts",
+      },
+      outputPath: outputPath(paths.app_output_root, latestBuild),
+      publicPath: publicPath(latestBuild),
+      isProdBuild,
+      latestBuild,
+      isStatsBuild,
+      isWDS,
+    };
+  },
+
+  demo({ isProdBuild, latestBuild, isStatsBuild }) {
+    return {
+      entry: {
+        main: path.resolve(paths.demo_dir, "src/entrypoint.ts"),
+      },
+      outputPath: outputPath(paths.demo_output_root, latestBuild),
+      publicPath: publicPath(latestBuild),
+      defineOverlay: {
+        __VERSION__: JSON.stringify(`DEMO-${env.version()}`),
+        __DEMO__: true,
+      },
+      isProdBuild,
+      latestBuild,
+      isStatsBuild,
+    };
+  },
+
+  cast({ isProdBuild, latestBuild }) {
+    const entry = {
+      launcher: path.resolve(paths.cast_dir, "src/launcher/entrypoint.ts"),
+      media: path.resolve(paths.cast_dir, "src/media/entrypoint.ts"),
+    };
+
+    if (latestBuild) {
+      entry.receiver = path.resolve(
+        paths.cast_dir,
+        "src/receiver/entrypoint.ts"
+      );
+    }
+
+    return {
+      entry,
+      outputPath: outputPath(paths.cast_output_root, latestBuild),
+      publicPath: publicPath(latestBuild),
+      isProdBuild,
+      latestBuild,
+      defineOverlay: {
+        __BACKWARDS_COMPAT__: true,
+      },
+    };
+  },
+
+  hassio({ isProdBuild, latestBuild }) {
+    return {
+      entry: {
+        entrypoint: path.resolve(paths.hassio_dir, "src/entrypoint.ts"),
+      },
+      outputPath: outputPath(paths.hassio_output_root, latestBuild),
+      publicPath: publicPath(latestBuild, paths.hassio_publicPath),
+      isProdBuild,
+      latestBuild,
+      defineOverlay: {
+        __SUPERVISOR__: true,
+      },
+    };
+  },
+
+  gallery({ isProdBuild, latestBuild }) {
+    return {
+      entry: {
+        entrypoint: path.resolve(paths.gallery_dir, "src/entrypoint.js"),
+      },
+      outputPath: outputPath(paths.gallery_output_root, latestBuild),
+      publicPath: publicPath(latestBuild),
+      isProdBuild,
+      latestBuild,
+      defineOverlay: {
+        __DEMO__: true,
+      },
+    };
+  },
+};
@@ -1,10 +1,19 @@
+/* eslint-disable @typescript-eslint/no-var-requires */
 const fs = require("fs");
 const path = require("path");
 const paths = require("./paths.js");

 module.exports = {
+  useRollup() {
+    return process.env.ROLLUP === "1";
+  },
+  useWDS() {
+    return process.env.WDS === "1";
+  },
  isProdBuild() {
-    return process.env.NODE_ENV === "production";
+    return (
+      process.env.NODE_ENV === "production" || module.exports.isStatsBuild()
+    );
  },
  isStatsBuild() {
    return process.env.STATS === "1";
@@ -1,16 +1,19 @@
 // Run HA develop mode
 const gulp = require("gulp");

-const envVars = require("../env");
+const env = require("../env");

 require("./clean.js");
 require("./translations.js");
+require("./locale-data.js");
 require("./gen-icons-json.js");
 require("./gather-static.js");
 require("./compress.js");
 require("./webpack.js");
 require("./service-worker.js");
 require("./entry-html.js");
+require("./rollup.js");
+require("./wds.js");

 gulp.task(
  "develop-app",
@@ -24,10 +27,15 @@ gulp.task(
      "gen-icons-json",
      "gen-pages-dev",
      "gen-index-app-dev",
-      "build-translations"
+      "build-translations",
+      "build-locale-data"
    ),
-    "copy-static",
-    "webpack-watch-app"
+    "copy-static-app",
+    env.useWDS()
+      ? "wds-watch-app"
+      : env.useRollup()
+      ? "rollup-watch-app"
+      : "webpack-watch-app"
  )
 );

@@ -38,11 +46,11 @@ gulp.task(
      process.env.NODE_ENV = "production";
    },
    "clean",
-    gulp.parallel("gen-icons-json", "build-translations"),
-    "copy-static",
-    "webpack-prod-app",
-    ...// Don't compress running tests
-    (envVars.isTest() ? [] : ["compress-app"]),
+    gulp.parallel("gen-icons-json", "build-translations", "build-locale-data"),
+    "copy-static-app",
+    env.useRollup() ? "rollup-prod-app" : "webpack-prod-app",
+    // Don't compress running tests
+    ...(env.isTest() ? [] : ["compress-app"]),
    gulp.parallel(
      "gen-pages-prod",
      "gen-index-app-prod",
@@ -1,11 +1,14 @@
 const gulp = require("gulp");

+const env = require("../env");
+
 require("./clean.js");
 require("./translations.js");
 require("./gather-static.js");
 require("./webpack.js");
 require("./service-worker.js");
 require("./entry-html.js");
+require("./rollup.js");

 gulp.task(
  "develop-cast",
@@ -15,9 +18,10 @@ gulp.task(
    },
    "clean-cast",
    "translations-enable-merge-backend",
-    gulp.parallel("gen-icons-json", "build-translations"),
+    gulp.parallel("gen-icons-json", "build-translations", "build-locale-data"),
    "copy-static-cast",
-    "webpack-dev-server-cast"
+    "gen-index-cast-dev",
+    env.useRollup() ? "rollup-dev-server-cast" : "webpack-dev-server-cast"
  )
 );

@@ -29,9 +33,9 @@ gulp.task(
    },
    "clean-cast",
    "translations-enable-merge-backend",
-    gulp.parallel("gen-icons-json", "build-translations"),
+    gulp.parallel("gen-icons-json", "build-translations", "build-locale-data"),
    "copy-static-cast",
-    "webpack-prod-cast",
+    env.useRollup() ? "rollup-prod-cast" : "webpack-prod-cast",
    "gen-index-cast-prod"
  )
 );
@@ -1,39 +1,36 @@
 const del = require("del");
 const gulp = require("gulp");
-const config = require("../paths");
+const paths = require("../paths");
 require("./translations");

 gulp.task(
  "clean",
-  gulp.parallel("clean-translations", function cleanOutputAndBuildDir() {
-    return del([config.root, config.build_dir]);
-  })
+  gulp.parallel("clean-translations", () =>
+    del([paths.app_output_root, paths.build_dir])
+  )
 );

 gulp.task(
  "clean-demo",
-  gulp.parallel("clean-translations", function cleanOutputAndBuildDir() {
-    return del([config.demo_root, config.build_dir]);
-  })
+  gulp.parallel("clean-translations", () =>
+    del([paths.demo_output_root, paths.build_dir])
+  )
 );

 gulp.task(
  "clean-cast",
-  gulp.parallel("clean-translations", function cleanOutputAndBuildDir() {
-    return del([config.cast_root, config.build_dir]);
-  })
+  gulp.parallel("clean-translations", () =>
+    del([paths.cast_output_root, paths.build_dir])
+  )
 );

-gulp.task(
-  "clean-hassio",
-  gulp.parallel("clean-translations", function cleanOutputAndBuildDir() {
-    return del([config.hassio_root, config.build_dir]);
-  })
+gulp.task("clean-hassio", () =>
+  del([paths.hassio_output_root, paths.build_dir])
 );

 gulp.task(
  "clean-gallery",
-  gulp.parallel("clean-translations", function cleanOutputAndBuildDir() {
-    return del([config.gallery_root, config.build_dir]);
-  })
+  gulp.parallel("clean-translations", () =>
+    del([paths.gallery_output_root, paths.build_dir])
+  )
 );
@@ -6,38 +6,40 @@ const merge = require("merge-stream");
 const path = require("path");
 const paths = require("../paths");

+const zopfliOptions = { threshold: 150 };
+
 gulp.task("compress-app", function compressApp() {
  const jsLatest = gulp
-    .src(path.resolve(paths.output, "**/*.js"))
-    .pipe(zopfli({ threshold: 150 }))
-    .pipe(gulp.dest(paths.output));
+    .src(path.resolve(paths.app_output_latest, "**/*.js"))
+    .pipe(zopfli(zopfliOptions))
+    .pipe(gulp.dest(paths.app_output_latest));

  const jsEs5 = gulp
-    .src(path.resolve(paths.output_es5, "**/*.js"))
-    .pipe(zopfli({ threshold: 150 }))
-    .pipe(gulp.dest(paths.output_es5));
+    .src(path.resolve(paths.app_output_es5, "**/*.js"))
+    .pipe(zopfli(zopfliOptions))
+    .pipe(gulp.dest(paths.app_output_es5));

  const polyfills = gulp
-    .src(path.resolve(paths.static, "polyfills/*.js"))
-    .pipe(zopfli({ threshold: 150 }))
-    .pipe(gulp.dest(path.resolve(paths.static, "polyfills")));
+    .src(path.resolve(paths.app_output_static, "polyfills/*.js"))
+    .pipe(zopfli(zopfliOptions))
+    .pipe(gulp.dest(path.resolve(paths.app_output_static, "polyfills")));

  const translations = gulp
-    .src(path.resolve(paths.static, "translations/**/*.json"))
-    .pipe(zopfli({ threshold: 150 }))
-    .pipe(gulp.dest(path.resolve(paths.static, "translations")));
+    .src(path.resolve(paths.app_output_static, "translations/**/*.json"))
+    .pipe(zopfli(zopfliOptions))
+    .pipe(gulp.dest(path.resolve(paths.app_output_static, "translations")));

  const icons = gulp
-    .src(path.resolve(paths.static, "mdi/*.json"))
-    .pipe(zopfli({ threshold: 150 }))
-    .pipe(gulp.dest(path.resolve(paths.static, "mdi")));
+    .src(path.resolve(paths.app_output_static, "mdi/*.json"))
+    .pipe(zopfli(zopfliOptions))
+    .pipe(gulp.dest(path.resolve(paths.app_output_static, "mdi")));

  return merge(jsLatest, jsEs5, polyfills, translations, icons);
 });

 gulp.task("compress-hassio", function compressApp() {
  return gulp
-    .src(path.resolve(paths.hassio_root, "**/*.js"))
-    .pipe(zopfli())
-    .pipe(gulp.dest(paths.hassio_root));
+    .src(path.resolve(paths.hassio_output_root, "**/*.js"))
+    .pipe(zopfli(zopfliOptions))
+    .pipe(gulp.dest(paths.hassio_output_root));
 });
@@ -1,6 +1,8 @@
 // Run demo develop mode
 const gulp = require("gulp");

+const env = require("../env");
+
 require("./clean.js");
 require("./translations.js");
 require("./gen-icons-json.js");
@@ -8,6 +10,7 @@ require("./gather-static.js");
 require("./webpack.js");
 require("./service-worker.js");
 require("./entry-html.js");
+require("./rollup.js");

 gulp.task(
  "develop-demo",
@@ -17,9 +20,14 @@ gulp.task(
    },
    "clean-demo",
    "translations-enable-merge-backend",
-    gulp.parallel("gen-icons-json", "gen-index-demo-dev", "build-translations"),
+    gulp.parallel(
+      "gen-icons-json",
+      "gen-index-demo-dev",
+      "build-translations",
+      "build-locale-data"
+    ),
    "copy-static-demo",
-    "webpack-dev-server-demo"
+    env.useRollup() ? "rollup-dev-server-demo" : "webpack-dev-server-demo"
  )
 );

@@ -32,9 +40,9 @@ gulp.task(
    "clean-demo",
    // Cast needs to be backwards compatible and older HA has no translations
    "translations-enable-merge-backend",
-    gulp.parallel("gen-icons-json", "build-translations"),
+    gulp.parallel("gen-icons-json", "build-translations", "build-locale-data"),
    "copy-static-demo",
-    "webpack-prod-demo",
+    env.useRollup() ? "rollup-prod-demo" : "webpack-prod-demo",
    "gen-index-demo-prod"
  )
 );
@@ -6,31 +6,37 @@ const fs = require("fs-extra");
 const path = require("path");
 const template = require("lodash.template");
 const minify = require("html-minifier").minify;
-const config = require("../paths.js");
+const paths = require("../paths.js");
+const env = require("../env.js");

 const templatePath = (tpl) =>
-  path.resolve(config.polymer_dir, "src/html/", `${tpl}.html.template`);
+  path.resolve(paths.polymer_dir, "src/html/", `${tpl}.html.template`);

 const readFile = (pth) => fs.readFileSync(pth).toString();

 const renderTemplate = (pth, data = {}, pathFunc = templatePath) => {
  const compiled = template(readFile(pathFunc(pth)));
-  return compiled({ ...data, renderTemplate });
+  return compiled({
+    ...data,
+    useRollup: env.useRollup(),
+    useWDS: env.useWDS(),
+    renderTemplate,
+  });
 };

 const renderDemoTemplate = (pth, data = {}) =>
  renderTemplate(pth, data, (tpl) =>
-    path.resolve(config.demo_dir, "src/html/", `${tpl}.html.template`)
+    path.resolve(paths.demo_dir, "src/html/", `${tpl}.html.template`)
  );

 const renderCastTemplate = (pth, data = {}) =>
  renderTemplate(pth, data, (tpl) =>
-    path.resolve(config.cast_dir, "src/html/", `${tpl}.html.template`)
+    path.resolve(paths.cast_dir, "src/html/", `${tpl}.html.template`)
  );

 const renderGalleryTemplate = (pth, data = {}) =>
  renderTemplate(pth, data, (tpl) =>
-    path.resolve(config.gallery_dir, "src/html/", `${tpl}.html.template`)
+    path.resolve(paths.gallery_dir, "src/html/", `${tpl}.html.template`)
  );

 const minifyHtml = (content) =>
@@ -48,29 +54,36 @@ gulp.task("gen-pages-dev", (done) => {
    const content = renderTemplate(page, {
      latestPageJS: `/frontend_latest/${page}.js`,

-      es5Compatibility: "/frontend_es5/compatibility.js",
      es5PageJS: `/frontend_es5/${page}.js`,
    });

-    fs.outputFileSync(path.resolve(config.root, `${page}.html`), content);
+    fs.outputFileSync(
+      path.resolve(paths.app_output_root, `${page}.html`),
+      content
+    );
  }
  done();
 });

 gulp.task("gen-pages-prod", (done) => {
-  const latestManifest = require(path.resolve(config.output, "manifest.json"));
-  const es5Manifest = require(path.resolve(config.output_es5, "manifest.json"));
+  const latestManifest = require(path.resolve(
+    paths.app_output_latest,
+    "manifest.json"
+  ));
+  const es5Manifest = require(path.resolve(
+    paths.app_output_es5,
+    "manifest.json"
+  ));

  for (const page of PAGES) {
    const content = renderTemplate(page, {
      latestPageJS: latestManifest[`${page}.js`],

-      es5Compatibility: es5Manifest["compatibility.js"],
      es5PageJS: es5Manifest[`${page}.js`],
    });

    fs.outputFileSync(
-      path.resolve(config.root, `${page}.html`),
+      path.resolve(paths.app_output_root, `${page}.html`),
      minifyHtml(content)
    );
  }
@@ -78,39 +91,57 @@ gulp.task("gen-pages-prod", (done) => {
 });

 gulp.task("gen-index-app-dev", (done) => {
-  // In dev mode we don't mangle names, so we hardcode urls. That way we can
-  // run webpack as last in watch mode, which blocks output.
-  const content = renderTemplate("index", {
-    latestAppJS: "/frontend_latest/app.js",
-    latestCoreJS: "/frontend_latest/core.js",
-    latestCustomPanelJS: "/frontend_latest/custom-panel.js",
+  let latestAppJS, latestCoreJS, latestCustomPanelJS;
+
+  if (env.useWDS()) {
+    latestAppJS = "http://localhost:8000/src/entrypoints/app.ts";
+    latestCoreJS = "http://localhost:8000/src/entrypoints/core.ts";
+    latestCustomPanelJS =
+      "http://localhost:8000/src/entrypoints/custom-panel.ts";
+  } else {
+    latestAppJS = "/frontend_latest/app.js";
+    latestCoreJS = "/frontend_latest/core.js";
+    latestCustomPanelJS = "/frontend_latest/custom-panel.js";
+  }
+
+  const content = renderTemplate("index", {
+    latestAppJS,
+    latestCoreJS,
+    latestCustomPanelJS,

-    es5Compatibility: "/frontend_es5/compatibility.js",
    es5AppJS: "/frontend_es5/app.js",
    es5CoreJS: "/frontend_es5/core.js",
    es5CustomPanelJS: "/frontend_es5/custom-panel.js",
  }).replace(/#THEMEC/g, "{{ theme_color }}");

-  fs.outputFileSync(path.resolve(config.root, "index.html"), content);
+  fs.outputFileSync(path.resolve(paths.app_output_root, "index.html"), content);
  done();
 });

 gulp.task("gen-index-app-prod", (done) => {
-  const latestManifest = require(path.resolve(config.output, "manifest.json"));
-  const es5Manifest = require(path.resolve(config.output_es5, "manifest.json"));
+  const latestManifest = require(path.resolve(
+    paths.app_output_latest,
+    "manifest.json"
+  ));
+  const es5Manifest = require(path.resolve(
+    paths.app_output_es5,
+    "manifest.json"
+  ));
  const content = renderTemplate("index", {
    latestAppJS: latestManifest["app.js"],
    latestCoreJS: latestManifest["core.js"],
    latestCustomPanelJS: latestManifest["custom-panel.js"],

-    es5Compatibility: es5Manifest["compatibility.js"],
    es5AppJS: es5Manifest["app.js"],
    es5CoreJS: es5Manifest["core.js"],
    es5CustomPanelJS: es5Manifest["custom-panel.js"],
  });
  const minified = minifyHtml(content).replace(/#THEMEC/g, "{{ theme_color }}");

-  fs.outputFileSync(path.resolve(config.root, "index.html"), minified);
+  fs.outputFileSync(
+    path.resolve(paths.app_output_root, "index.html"),
+    minified
+  );
  done();
 });

@@ -119,22 +150,34 @@ gulp.task("gen-index-cast-dev", (done) => {
    latestReceiverJS: "/frontend_latest/receiver.js",
  });
  fs.outputFileSync(
-    path.resolve(config.cast_root, "receiver.html"),
+    path.resolve(paths.cast_output_root, "receiver.html"),
    contentReceiver
  );

+  const contentMedia = renderCastTemplate("media", {
+    latestMediaJS: "/frontend_latest/media.js",
+    es5MediaJS: "/frontend_es5/media.js",
+  });
+  fs.outputFileSync(
+    path.resolve(paths.cast_output_root, "media.html"),
+    contentMedia
+  );
+
  const contentFAQ = renderCastTemplate("launcher-faq", {
    latestLauncherJS: "/frontend_latest/launcher.js",
    es5LauncherJS: "/frontend_es5/launcher.js",
  });
-  fs.outputFileSync(path.resolve(config.cast_root, "faq.html"), contentFAQ);
+  fs.outputFileSync(
+    path.resolve(paths.cast_output_root, "faq.html"),
+    contentFAQ
+  );

  const contentLauncher = renderCastTemplate("launcher", {
    latestLauncherJS: "/frontend_latest/launcher.js",
    es5LauncherJS: "/frontend_es5/launcher.js",
  });
  fs.outputFileSync(
-    path.resolve(config.cast_root, "index.html"),
+    path.resolve(paths.cast_output_root, "index.html"),
    contentLauncher
  );
  done();
@@ -142,11 +185,11 @@ gulp.task("gen-index-cast-dev", (done) => {

 gulp.task("gen-index-cast-prod", (done) => {
  const latestManifest = require(path.resolve(
-    config.cast_output,
+    paths.cast_output_latest,
    "manifest.json"
  ));
  const es5Manifest = require(path.resolve(
-    config.cast_output_es5,
+    paths.cast_output_es5,
    "manifest.json"
  ));

@@ -154,76 +197,91 @@ gulp.task("gen-index-cast-prod", (done) => {
    latestReceiverJS: latestManifest["receiver.js"],
  });
  fs.outputFileSync(
-    path.resolve(config.cast_root, "receiver.html"),
+    path.resolve(paths.cast_output_root, "receiver.html"),
    contentReceiver
  );

+  const contentMedia = renderCastTemplate("media", {
+    latestMediaJS: latestManifest["media.js"],
+    es5MediaJS: es5Manifest["media.js"],
+  });
+  fs.outputFileSync(
+    path.resolve(paths.cast_output_root, "media.html"),
+    contentMedia
+  );
+
  const contentFAQ = renderCastTemplate("launcher-faq", {
    latestLauncherJS: latestManifest["launcher.js"],
    es5LauncherJS: es5Manifest["launcher.js"],
  });
-  fs.outputFileSync(path.resolve(config.cast_root, "faq.html"), contentFAQ);
+  fs.outputFileSync(
+    path.resolve(paths.cast_output_root, "faq.html"),
+    contentFAQ
+  );

  const contentLauncher = renderCastTemplate("launcher", {
    latestLauncherJS: latestManifest["launcher.js"],
    es5LauncherJS: es5Manifest["launcher.js"],
  });
  fs.outputFileSync(
-    path.resolve(config.cast_root, "index.html"),
+    path.resolve(paths.cast_output_root, "index.html"),
    contentLauncher
  );
  done();
 });

 gulp.task("gen-index-demo-dev", (done) => {
-  // In dev mode we don't mangle names, so we hardcode urls. That way we can
-  // run webpack as last in watch mode, which blocks output.
  const content = renderDemoTemplate("index", {
    latestDemoJS: "/frontend_latest/main.js",

-    es5Compatibility: "/frontend_es5/compatibility.js",
    es5DemoJS: "/frontend_es5/main.js",
  });

-  fs.outputFileSync(path.resolve(config.demo_root, "index.html"), content);
+  fs.outputFileSync(
+    path.resolve(paths.demo_output_root, "index.html"),
+    content
+  );
  done();
 });

 gulp.task("gen-index-demo-prod", (done) => {
  const latestManifest = require(path.resolve(
-    config.demo_output,
+    paths.demo_output_latest,
    "manifest.json"
  ));
  const es5Manifest = require(path.resolve(
-    config.demo_output_es5,
+    paths.demo_output_es5,
    "manifest.json"
  ));
  const content = renderDemoTemplate("index", {
    latestDemoJS: latestManifest["main.js"],

-    es5Compatibility: es5Manifest["compatibility.js"],
    es5DemoJS: es5Manifest["main.js"],
  });
  const minified = minifyHtml(content);

-  fs.outputFileSync(path.resolve(config.demo_root, "index.html"), minified);
+  fs.outputFileSync(
+    path.resolve(paths.demo_output_root, "index.html"),
+    minified
+  );
  done();
 });

 gulp.task("gen-index-gallery-dev", (done) => {
-  // In dev mode we don't mangle names, so we hardcode urls. That way we can
-  // run webpack as last in watch mode, which blocks output.
  const content = renderGalleryTemplate("index", {
    latestGalleryJS: "./frontend_latest/entrypoint.js",
  });

-  fs.outputFileSync(path.resolve(config.gallery_root, "index.html"), content);
+  fs.outputFileSync(
+    path.resolve(paths.gallery_output_root, "index.html"),
+    content
+  );
  done();
 });

 gulp.task("gen-index-gallery-prod", (done) => {
  const latestManifest = require(path.resolve(
-    config.gallery_output,
+    paths.gallery_output_latest,
    "manifest.json"
  ));
  const content = renderGalleryTemplate("index", {
@@ -231,6 +289,56 @@ gulp.task("gen-index-gallery-prod", (done) => {
  });
  const minified = minifyHtml(content);

-  fs.outputFileSync(path.resolve(config.gallery_root, "index.html"), minified);
+  fs.outputFileSync(
+    path.resolve(paths.gallery_output_root, "index.html"),
+    minified
+  );
  done();
 });
+
+gulp.task("gen-index-hassio-dev", async () => {
+  writeHassioEntrypoint(
+    `${paths.hassio_publicPath}/frontend_latest/entrypoint.js`,
+    `${paths.hassio_publicPath}/frontend_es5/entrypoint.js`
+  );
+});
+
+gulp.task("gen-index-hassio-prod", async () => {
+  const latestManifest = require(path.resolve(
+    paths.hassio_output_latest,
+    "manifest.json"
+  ));
+  const es5Manifest = require(path.resolve(
+    paths.hassio_output_es5,
+    "manifest.json"
+  ));
+  writeHassioEntrypoint(
+    latestManifest["entrypoint.js"],
+    es5Manifest["entrypoint.js"]
+  );
+});
+
+function writeHassioEntrypoint(latestEntrypoint, es5Entrypoint) {
+  fs.mkdirSync(paths.hassio_output_root, { recursive: true });
+  // Safari 12 and below does not have a compliant ES2015 implementation of template literals, so we ship ES5
+  fs.writeFileSync(
+    path.resolve(paths.hassio_output_root, "entrypoint.js"),
+    `
+function loadES5() {
+  var el = document.createElement('script');
+  el.src = '${es5Entrypoint}';
+  document.body.appendChild(el);
+}
+if (/.*Version\\/(?:11|12)(?:\\.\\d+)*.*Safari\\//.test(navigator.userAgent)) {
+    loadES5();
+} else {
+  try {
+    new Function("import('${latestEntrypoint}')")();
+  } catch (err) {
+    loadES5();
+  }
+}
+  `,
+    { encoding: "utf-8" }
+  );
+}
@@ -1,5 +1,10 @@
 // Run demo develop mode
 const gulp = require("gulp");
+const fs = require("fs");
+const path = require("path");
+
+const env = require("../env");
+const paths = require("../paths");

 require("./clean.js");
 require("./translations.js");
@@ -8,6 +13,32 @@ require("./gather-static.js");
 require("./webpack.js");
 require("./service-worker.js");
 require("./entry-html.js");
+require("./rollup.js");
+
+gulp.task("gather-gallery-demos", async function gatherDemos() {
+  const files = await fs.promises.readdir(
+    path.resolve(paths.gallery_dir, "src/demos")
+  );
+
+  let content = "export const DEMOS = {\n";
+
+  for (const file of files) {
+    const demoId = path.basename(file, ".ts");
+    const demoPath = "../src/demos/" + demoId;
+    content += `  "${demoId}": () => import("${demoPath}"),\n`;
+  }
+
+  content += "};";
+
+  const galleryBuild = path.resolve(paths.gallery_dir, "build");
+
+  fs.mkdirSync(galleryBuild, { recursive: true });
+  fs.writeFileSync(
+    path.resolve(galleryBuild, "import-demos.ts"),
+    content,
+    "utf-8"
+  );
+});

 gulp.task(
  "develop-gallery",
@@ -17,10 +48,15 @@ gulp.task(
    },
    "clean-gallery",
    "translations-enable-merge-backend",
-    gulp.parallel("gen-icons-json", "build-translations"),
+    gulp.parallel(
+      "gen-icons-json",
+      "build-translations",
+      "build-locale-data",
+      "gather-gallery-demos"
+    ),
    "copy-static-gallery",
    "gen-index-gallery-dev",
-    "webpack-dev-server-gallery"
+    env.useRollup() ? "rollup-dev-server-gallery" : "webpack-dev-server-gallery"
  )
 );

@@ -32,9 +68,14 @@ gulp.task(
    },
    "clean-gallery",
    "translations-enable-merge-backend",
-    gulp.parallel("gen-icons-json", "build-translations"),
+    gulp.parallel(
+      "gen-icons-json",
+      "build-translations",
+      "build-locale-data",
+      "gather-gallery-demos"
+    ),
    "copy-static-gallery",
-    "webpack-prod-gallery",
+    env.useRollup() ? "rollup-prod-gallery" : "webpack-prod-gallery",
    "gen-index-gallery-prod"
  )
 );
@@ -2,7 +2,6 @@

 const gulp = require("gulp");
 const path = require("path");
-const cpx = require("cpx");
 const fs = require("fs-extra");
 const paths = require("../paths");

@@ -13,19 +12,28 @@ const polyPath = (...parts) => path.resolve(paths.polymer_dir, ...parts);
 const copyFileDir = (fromFile, toDir) =>
  fs.copySync(fromFile, path.join(toDir, path.basename(fromFile)));

-const genStaticPath = (staticDir) => (...parts) =>
-  path.resolve(staticDir, ...parts);
+const genStaticPath =
+  (staticDir) =>
+  (...parts) =>
+    path.resolve(staticDir, ...parts);

 function copyTranslations(staticDir) {
  const staticPath = genStaticPath(staticDir);

  // Translation output
  fs.copySync(
-    polyPath("build-translations/output"),
+    polyPath("build/translations/output"),
    staticPath("translations")
  );
 }

+function copyLocaleData(staticDir) {
+  const staticPath = genStaticPath(staticDir);
+
+  // Locale data output
+  fs.copySync(polyPath("build/locale-data"), staticPath("locale-data"));
+}
+
 function copyMdiIcons(staticDir) {
  const staticPath = genStaticPath(staticDir);

@@ -36,11 +44,13 @@ function copyMdiIcons(staticDir) {
 function copyPolyfills(staticDir) {
  const staticPath = genStaticPath(staticDir);

-  // Web Component polyfills and adapters
+  // For custom panels using ES5 builds that don't use Babel 7+
  copyFileDir(
    npmPath("@webcomponents/webcomponentsjs/custom-elements-es5-adapter.js"),
    staticPath("polyfills/")
  );
+
+  // Web Component polyfills and adapters
  copyFileDir(
    npmPath("@webcomponents/webcomponentsjs/webcomponents-bundle.js"),
    staticPath("polyfills/")
@@ -51,12 +61,21 @@ function copyPolyfills(staticDir) {
  );
 }

+function copyLoaderJS(staticDir) {
+  const staticPath = genStaticPath(staticDir);
+  copyFileDir(npmPath("systemjs/dist/s.min.js"), staticPath("js"));
+  copyFileDir(npmPath("systemjs/dist/s.min.js.map"), staticPath("js"));
+}
+
 function copyFonts(staticDir) {
  const staticPath = genStaticPath(staticDir);
  // Local fonts
-  cpx.copySync(
-    npmPath("roboto-fontface/fonts/roboto/*.woff2"),
-    staticPath("fonts/roboto")
+  fs.copySync(
+    npmPath("roboto-fontface/fonts/roboto/"),
+    staticPath("fonts/roboto/"),
+    {
+      filter: (src) => !src.includes(".") || src.endsWith(".woff2"),
+    }
  );
 }

@@ -72,66 +91,87 @@ function copyMapPanel(staticDir) {
  );
 }

-gulp.task("copy-translations", (done) => {
-  const staticDir = paths.static;
-  copyTranslations(staticDir);
-  done();
+gulp.task("copy-locale-data", async () => {
+  const staticDir = paths.app_output_static;
+  copyLocaleData(staticDir);
 });

-gulp.task("copy-static", (done) => {
-  const staticDir = paths.static;
-  // Basic static files
-  fs.copySync(polyPath("public"), paths.root);
+gulp.task("copy-translations-app", async () => {
+  const staticDir = paths.app_output_static;
+  copyTranslations(staticDir);
+});

+gulp.task("copy-translations-supervisor", async () => {
+  const staticDir = paths.hassio_output_static;
+  copyTranslations(staticDir);
+});
+
+gulp.task("copy-locale-data-supervisor", async () => {
+  const staticDir = paths.hassio_output_static;
+  copyLocaleData(staticDir);
+});
+
+gulp.task("copy-static-app", async () => {
+  const staticDir = paths.app_output_static;
+  // Basic static files
+  fs.copySync(polyPath("public"), paths.app_output_root);
+
+  copyLoaderJS(staticDir);
  copyPolyfills(staticDir);
  copyFonts(staticDir);
  copyTranslations(staticDir);
+  copyLocaleData(staticDir);
  copyMdiIcons(staticDir);

  // Panel assets
  copyMapPanel(staticDir);
-  done();
 });

-gulp.task("copy-static-demo", (done) => {
+gulp.task("copy-static-demo", async () => {
  // Copy app static files
  fs.copySync(
    polyPath("public/static"),
-    path.resolve(paths.demo_root, "static")
+    path.resolve(paths.demo_output_root, "static")
  );
  // Copy demo static files
-  fs.copySync(path.resolve(paths.demo_dir, "public"), paths.demo_root);
+  fs.copySync(path.resolve(paths.demo_dir, "public"), paths.demo_output_root);

-  copyPolyfills(paths.demo_static);
-  copyMapPanel(paths.demo_static);
-  copyFonts(paths.demo_static);
-  copyTranslations(paths.demo_static);
-  copyMdiIcons(paths.demo_static);
-  done();
+  copyLoaderJS(paths.demo_output_static);
+  copyPolyfills(paths.demo_output_static);
+  copyMapPanel(paths.demo_output_static);
+  copyFonts(paths.demo_output_static);
+  copyTranslations(paths.demo_output_static);
+  copyLocaleData(paths.demo_output_static);
+  copyMdiIcons(paths.demo_output_static);
 });

-gulp.task("copy-static-cast", (done) => {
+gulp.task("copy-static-cast", async () => {
  // Copy app static files
-  fs.copySync(polyPath("public/static"), paths.cast_static);
+  fs.copySync(polyPath("public/static"), paths.cast_output_static);
  // Copy cast static files
-  fs.copySync(path.resolve(paths.cast_dir, "public"), paths.cast_root);
+  fs.copySync(path.resolve(paths.cast_dir, "public"), paths.cast_output_root);

-  copyMapPanel(paths.cast_static);
-  copyFonts(paths.cast_static);
-  copyTranslations(paths.cast_static);
-  copyMdiIcons(paths.cast_static);
-  done();
+  copyLoaderJS(paths.cast_output_static);
+  copyPolyfills(paths.cast_output_static);
+  copyMapPanel(paths.cast_output_static);
+  copyFonts(paths.cast_output_static);
+  copyTranslations(paths.cast_output_static);
+  copyLocaleData(paths.cast_output_static);
+  copyMdiIcons(paths.cast_output_static);
 });

-gulp.task("copy-static-gallery", (done) => {
+gulp.task("copy-static-gallery", async () => {
  // Copy app static files
-  fs.copySync(polyPath("public/static"), paths.gallery_static);
+  fs.copySync(polyPath("public/static"), paths.gallery_output_static);
  // Copy gallery static files
-  fs.copySync(path.resolve(paths.gallery_dir, "public"), paths.gallery_root);
+  fs.copySync(
+    path.resolve(paths.gallery_dir, "public"),
+    paths.gallery_output_root
+  );

-  copyMapPanel(paths.gallery_static);
-  copyFonts(paths.gallery_static);
-  copyTranslations(paths.gallery_static);
-  copyMdiIcons(paths.gallery_static);
-  done();
+  copyMapPanel(paths.gallery_output_static);
+  copyFonts(paths.gallery_output_static);
+  copyTranslations(paths.gallery_output_static);
+  copyLocaleData(paths.gallery_output_static);
+  copyMdiIcons(paths.gallery_output_static);
 });
@@ -11,6 +11,7 @@ const META_PATH = path.resolve(ICON_PACKAGE_PATH, "meta.json");
 const PACKAGE_PATH = path.resolve(ICON_PACKAGE_PATH, "package.json");
 const ICON_PATH = path.resolve(ICON_PACKAGE_PATH, "svg");
 const OUTPUT_DIR = path.resolve(__dirname, "../../build/mdi");
+const REMOVED_ICONS_PATH = path.resolve(__dirname, "../removedIcons.json");

 const encoding = "utf8";

@@ -21,10 +22,40 @@ const getMeta = () => {
    const svg = fs.readFileSync(`${ICON_PATH}/${icon.name}.svg`, {
      encoding,
    });
-    return { path: svg.match(/ d="([^"]+)"/)[1], name: icon.name };
+    return {
+      path: svg.match(/ d="([^"]+)"/)[1],
+      name: icon.name,
+      tags: icon.tags,
+      aliases: icon.aliases,
+    };
  });
 };

+const addRemovedMeta = (meta) => {
+  const file = fs.readFileSync(REMOVED_ICONS_PATH, { encoding });
+  const removed = JSON.parse(file);
+  const removedMeta = removed.map((removeIcon) => ({
+    path: removeIcon.path,
+    name: removeIcon.name,
+    tags: [],
+    aliases: [],
+  }));
+  const combinedMeta = [...meta, ...removedMeta];
+  return combinedMeta.sort((a, b) => a.name.localeCompare(b.name));
+};
+
+const homeAutomationTag = "Home Automation";
+
+const orderMeta = (meta) => {
+  const homeAutomationMeta = meta.filter((icon) =>
+    icon.tags.includes(homeAutomationTag)
+  );
+  const otherMeta = meta.filter(
+    (icon) => !icon.tags.includes(homeAutomationTag)
+  );
+  return [...homeAutomationMeta, ...otherMeta];
+};
+
 const splitBySize = (meta) => {
  const chunks = [];
  const CHUNK_SIZE = 50000;
@@ -70,7 +101,9 @@ const findDifferentiator = (curString, prevString) => {

 gulp.task("gen-icons-json", (done) => {
  const meta = getMeta();
-  const split = splitBySize(meta);
+
+  const metaAndRemoved = addRemovedMeta(meta);
+  const split = splitBySize(metaAndRemoved);

  if (!fs.existsSync(OUTPUT_DIR)) {
    fs.mkdirSync(OUTPUT_DIR, { recursive: true });
@@ -108,5 +141,18 @@ gulp.task("gen-icons-json", (done) => {
    JSON.stringify({ version: package.version, parts })
  );

+  fs.writeFileSync(
+    path.resolve(OUTPUT_DIR, "iconList.json"),
+    JSON.stringify(
+      orderMeta(meta).map((icon) => ({
+        name: icon.name,
+        keywords: [
+          ...icon.tags.map((t) => t.toLowerCase().replace(/\s\/\s/g, " ")),
+          ...icon.aliases,
+        ],
+      }))
+    )
+  );
+
  done();
 });
@@ -1,11 +1,14 @@
 const gulp = require("gulp");

-const envVars = require("../env");
+const env = require("../env");

 require("./clean.js");
 require("./gen-icons-json.js");
 require("./webpack.js");
 require("./compress.js");
+require("./rollup.js");
+require("./gather-static.js");
+require("./translations.js");

 gulp.task(
  "develop-hassio",
@@ -14,8 +17,12 @@ gulp.task(
      process.env.NODE_ENV = "development";
    },
    "clean-hassio",
-    "gen-icons-json",
-    "webpack-watch-hassio"
+    "gen-index-hassio-dev",
+    "build-supervisor-translations",
+    "copy-translations-supervisor",
+    "build-locale-data",
+    "copy-locale-data-supervisor",
+    env.useRollup() ? "rollup-watch-hassio" : "webpack-watch-hassio"
  )
 );

@@ -26,9 +33,13 @@ gulp.task(
      process.env.NODE_ENV = "production";
    },
    "clean-hassio",
-    "gen-icons-json",
-    "webpack-prod-hassio",
+    "build-supervisor-translations",
+    "copy-translations-supervisor",
+    "build-locale-data",
+    "copy-locale-data-supervisor",
+    env.useRollup() ? "rollup-prod-hassio" : "webpack-prod-hassio",
+    "gen-index-hassio-prod",
    ...// Don't compress running tests
-    (envVars.isTest() ? [] : ["compress-hassio"])
+    (env.isTest() ? [] : ["compress-hassio"])
  )
 );
@@ -0,0 +1,74 @@
+/* eslint-disable @typescript-eslint/no-var-requires */
+
+const del = require("del");
+const path = require("path");
+const gulp = require("gulp");
+const fs = require("fs");
+const paths = require("../paths");
+
+const outDir = "build/locale-data";
+
+gulp.task("clean-locale-data", () => del([outDir]));
+
+gulp.task("ensure-locale-data-build-dir", (done) => {
+  if (!fs.existsSync(outDir)) {
+    fs.mkdirSync(outDir, { recursive: true });
+  }
+  done();
+});
+
+const modules = {
+  "intl-relativetimeformat": "RelativeTimeFormat",
+  "intl-datetimeformat": "DateTimeFormat",
+  "intl-numberformat": "NumberFormat",
+};
+
+gulp.task("create-locale-data", (done) => {
+  const translationMeta = JSON.parse(
+    fs.readFileSync(
+      path.join(paths.translations_src, "translationMetadata.json")
+    )
+  );
+  Object.entries(modules).forEach(([module, className]) => {
+    Object.keys(translationMeta).forEach((lang) => {
+      try {
+        const localeData = String(
+          fs.readFileSync(
+            require.resolve(`@formatjs/${module}/locale-data/${lang}.js`)
+          )
+        )
+          .replace(
+            new RegExp(
+              `\\/\\*\\s*@generated\\s*\\*\\/\\s*\\/\\/\\s*prettier-ignore\\s*if\\s*\\(Intl\\.${className}\\s*&&\\s*typeof\\s*Intl\\.${className}\\.__addLocaleData\\s*===\\s*'function'\\)\\s*{\\s*Intl\\.${className}\\.__addLocaleData\\(`,
+              "im"
+            ),
+            ""
+          )
+          .replace(/\)\s*}/im, "");
+        // make sure we have valid JSON
+        JSON.parse(localeData);
+        if (!fs.existsSync(path.join(outDir, module))) {
+          fs.mkdirSync(path.join(outDir, module), { recursive: true });
+        }
+        fs.writeFileSync(
+          path.join(outDir, `${module}/${lang}.json`),
+          localeData
+        );
+      } catch (e) {
+        if (e.code !== "MODULE_NOT_FOUND") {
+          throw e;
+        }
+      }
+    });
+    done();
+  });
+});
+
+gulp.task(
+  "build-locale-data",
+  gulp.series(
+    "clean-locale-data",
+    "ensure-locale-data-build-dir",
+    "create-locale-data"
+  )
+);
@@ -0,0 +1,146 @@
+// Tasks to run Rollup
+const path = require("path");
+const gulp = require("gulp");
+const rollup = require("rollup");
+const handler = require("serve-handler");
+const http = require("http");
+const log = require("fancy-log");
+const rollupConfig = require("../rollup");
+const paths = require("../paths");
+const open = require("open");
+
+const bothBuilds = (createConfigFunc, params) =>
+  gulp.series(
+    async function buildLatest() {
+      await buildRollup(
+        createConfigFunc({
+          ...params,
+          latestBuild: true,
+        })
+      );
+    },
+    async function buildES5() {
+      await buildRollup(
+        createConfigFunc({
+          ...params,
+          latestBuild: false,
+        })
+      );
+    }
+  );
+
+function createServer(serveOptions) {
+  const server = http.createServer((request, response) => {
+    return handler(request, response, {
+      public: serveOptions.root,
+    });
+  });
+
+  server.listen(
+    serveOptions.port,
+    serveOptions.networkAccess ? "0.0.0.0" : undefined,
+    () => {
+      log.info(`Available at http://localhost:${serveOptions.port}`);
+      open(`http://localhost:${serveOptions.port}`);
+    }
+  );
+}
+
+function watchRollup(createConfig, extraWatchSrc = [], serveOptions) {
+  const { inputOptions, outputOptions } = createConfig({
+    isProdBuild: false,
+    latestBuild: true,
+  });
+
+  const watcher = rollup.watch({
+    ...inputOptions,
+    output: [outputOptions],
+    watch: {
+      include: ["src/**"] + extraWatchSrc,
+    },
+  });
+
+  let startedHttp = false;
+
+  watcher.on("event", (event) => {
+    if (event.code === "BUNDLE_END") {
+      log(`Build done @ ${new Date().toLocaleTimeString()}`);
+    } else if (event.code === "ERROR") {
+      log.error(event.error);
+    } else if (event.code === "END") {
+      if (startedHttp || !serveOptions) {
+        return;
+      }
+      startedHttp = true;
+      createServer(serveOptions);
+    }
+  });
+
+  gulp.watch(
+    path.join(paths.translations_src, "en.json"),
+    gulp.series("build-translations", "copy-translations-app")
+  );
+}
+
+async function buildRollup(config) {
+  const bundle = await rollup.rollup(config.inputOptions);
+  await bundle.write(config.outputOptions);
+}
+
+gulp.task("rollup-watch-app", () => {
+  watchRollup(rollupConfig.createAppConfig);
+});
+
+gulp.task("rollup-watch-hassio", () => {
+  watchRollup(rollupConfig.createHassioConfig, ["hassio/src/**"]);
+});
+
+gulp.task("rollup-dev-server-demo", () => {
+  watchRollup(rollupConfig.createDemoConfig, ["demo/src/**"], {
+    root: paths.demo_output_root,
+    port: 8090,
+  });
+});
+
+gulp.task("rollup-dev-server-cast", () => {
+  watchRollup(rollupConfig.createCastConfig, ["cast/src/**"], {
+    root: paths.cast_output_root,
+    port: 8080,
+    networkAccess: true,
+  });
+});
+
+gulp.task("rollup-dev-server-gallery", () => {
+  watchRollup(rollupConfig.createGalleryConfig, ["gallery/src/**"], {
+    root: paths.gallery_output_root,
+    port: 8100,
+  });
+});
+
+gulp.task(
+  "rollup-prod-app",
+  bothBuilds(rollupConfig.createAppConfig, { isProdBuild: true })
+);
+
+gulp.task(
+  "rollup-prod-demo",
+  bothBuilds(rollupConfig.createDemoConfig, { isProdBuild: true })
+);
+
+gulp.task(
+  "rollup-prod-cast",
+  bothBuilds(rollupConfig.createCastConfig, { isProdBuild: true })
+);
+
+gulp.task("rollup-prod-hassio", () =>
+  bothBuilds(rollupConfig.createHassioConfig, { isProdBuild: true })
+);
+
+gulp.task("rollup-prod-gallery", () =>
+  buildRollup(
+    rollupConfig.createGalleryConfig({
+      isProdBuild: true,
+      latestBuild: true,
+    })
+  )
+);
@@ -9,7 +9,7 @@ const workboxBuild = require("workbox-build");
 const sourceMapUrl = require("source-map-url");
 const paths = require("../paths.js");

-const swDest = path.resolve(paths.root, "service_worker.js");
+const swDest = path.resolve(paths.app_output_root, "service_worker.js");

 const writeSW = (content) => fs.outputFileSync(swDest, content.trim() + "\n");

@@ -31,32 +31,38 @@ self.addEventListener('install', (event) => {
 gulp.task("gen-service-worker-app-prod", async () => {
  // Read bundled source file
  const bundleManifestLatest = require(path.resolve(
-    paths.output,
+    paths.app_output_latest,
    "manifest.json"
  ));
  let serviceWorkerContent = fs.readFileSync(
-    paths.root + bundleManifestLatest["service_worker.js"],
+    paths.app_output_root + bundleManifestLatest["service_worker.js"],
    "utf-8"
  );

  // Delete old file from frontend_latest so manifest won't pick it up
-  fs.removeSync(paths.root + bundleManifestLatest["service_worker.js"]);
-  fs.removeSync(paths.root + bundleManifestLatest["service_worker.js.map"]);
+  fs.removeSync(
+    paths.app_output_root + bundleManifestLatest["service_worker.js"]
+  );
+  fs.removeSync(
+    paths.app_output_root + bundleManifestLatest["service_worker.js.map"]
+  );

  // Remove ES5
  const bundleManifestES5 = require(path.resolve(
-    paths.output_es5,
+    paths.app_output_es5,
    "manifest.json"
  ));
-  fs.removeSync(paths.root + bundleManifestES5["service_worker.js"]);
-  fs.removeSync(paths.root + bundleManifestES5["service_worker.js.map"]);
+  fs.removeSync(paths.app_output_root + bundleManifestES5["service_worker.js"]);
+  fs.removeSync(
+    paths.app_output_root + bundleManifestES5["service_worker.js.map"]
+  );

  const workboxManifest = await workboxBuild.getManifest({
    // Files that mach this pattern will be considered unique and skip revision check
    // ignore JS files + translation files
    dontCacheBustURLsMatching: /(frontend_latest\/.+|static\/translations\/.+)/,

-    globDirectory: paths.root,
+    globDirectory: paths.app_output_root,
    globPatterns: [
      "frontend_latest/*.js",
      // Cache all English translations because we catch them as fallback
@@ -1,3 +1,5 @@
+/* eslint-disable @typescript-eslint/no-var-requires */
+
 const crypto = require("crypto");
 const del = require("del");
 const path = require("path");
@@ -7,7 +9,6 @@ const gulp = require("gulp");
 const fs = require("fs");
 const foreach = require("gulp-foreach");
 const merge = require("gulp-merge-json");
-const minify = require("gulp-jsonminify");
 const rename = require("gulp-rename");
 const transform = require("gulp-json-transform");
 const { mapFiles } = require("../util");
@@ -16,7 +17,7 @@ const paths = require("../paths");

 const inFrontendDir = "translations/frontend";
 const inBackendDir = "translations/backend";
-const workDir = "build-translations";
+const workDir = "build/translations";
 const fullDir = workDir + "/full";
 const coreDir = workDir + "/core";
 const outDir = workDir + "/output";
@@ -27,32 +28,14 @@ gulp.task("translations-enable-merge-backend", (done) => {
  done();
 });

-String.prototype.rsplit = function (sep, maxsplit) {
-  var split = this.split(sep);
-  return maxsplit
-    ? [split.slice(0, -maxsplit).join(sep)].concat(split.slice(-maxsplit))
-    : split;
-};
-
-// Panel translations which should be split from the core translations. These
-// should mirror the fragment definitions in polymer.json, so that we load
-// additional resources at equivalent points.
-const TRANSLATION_FRAGMENTS = [
-  "config",
-  "history",
-  "logbook",
-  "mailbox",
-  "profile",
-  "shopping-list",
-  "page-authorize",
-  "page-demo",
-  "page-onboarding",
-  "developer-tools",
-];
+// Panel translations which should be split from the core translations.
+const TRANSLATION_FRAGMENTS = Object.keys(
+  require("../../src/translations/en.json").ui.panel
+);

 function recursiveFlatten(prefix, data) {
  let output = {};
-  Object.keys(data).forEach(function (key) {
+  Object.keys(data).forEach((key) => {
    if (typeof data[key] === "object") {
      output = {
        ...output,
@@ -113,15 +96,19 @@ function lokaliseTransform(data, original, file) {
    if (value instanceof Object) {
      output[key] = lokaliseTransform(value, original, file);
    } else {
-      output[key] = value.replace(re_key_reference, (match, key) => {
-        const replace = key.split("::").reduce((tr, k) => {
+      output[key] = value.replace(re_key_reference, (_match, lokalise_key) => {
+        const replace = lokalise_key.split("::").reduce((tr, k) => {
          if (!tr) {
-            throw Error(`Invalid key placeholder ${key} in ${file.path}`);
+            throw Error(
+              `Invalid key placeholder ${lokalise_key} in ${file.path}`
+            );
          }
          return tr[k];
        }, original);
        if (typeof replace !== "string") {
-          throw Error(`Invalid key placeholder ${key} in ${file.path}`);
+          throw Error(
+            `Invalid key placeholder ${lokalise_key} in ${file.path}`
+          );
        }
        return replace;
      });
@@ -130,18 +117,16 @@ function lokaliseTransform(data, original, file) {
  return output;
 }

-gulp.task("clean-translations", function () {
-  return del([workDir]);
-});
+gulp.task("clean-translations", () => del([workDir]));

 gulp.task("ensure-translations-build-dir", (done) => {
  if (!fs.existsSync(workDir)) {
-    fs.mkdirSync(workDir);
+    fs.mkdirSync(workDir, { recursive: true });
  }
  done();
 });

-gulp.task("create-test-metadata", function (cb) {
+gulp.task("create-test-metadata", (cb) => {
  fs.writeFile(
    workDir + "/testMetadata.json",
    JSON.stringify({
@@ -155,17 +140,13 @@ gulp.task("create-test-metadata", function (cb) {

 gulp.task(
  "create-test-translation",
-  gulp.series("create-test-metadata", function createTestTranslation() {
-    return gulp
+  gulp.series("create-test-metadata", () =>
+    gulp
      .src(path.join(paths.translations_src, "en.json"))
-      .pipe(
-        transform(function (data, file) {
-          return recursiveEmpty(data);
-        })
-      )
+      .pipe(transform((data, _file) => recursiveEmpty(data)))
      .pipe(rename("test.json"))
-      .pipe(gulp.dest(workDir));
-  })
+      .pipe(gulp.dest(workDir))
+  )
 );

 /**
@@ -177,7 +158,7 @@ gulp.task(
 * project is buildable immediately after merging new translation keys, since
 * the Lokalise update to translations/en.json will not happen immediately.
 */
-gulp.task("build-master-translation", function () {
+gulp.task("build-master-translation", () => {
  const src = [path.join(paths.translations_src, "en.json")];

  if (mergeBackend) {
@@ -186,11 +167,7 @@ gulp.task("build-master-translation", function () {

  return gulp
    .src(src)
-    .pipe(
-      transform(function (data, file) {
-        return lokaliseTransform(data, data, file);
-      })
-    )
+    .pipe(transform((data, file) => lokaliseTransform(data, data, file)))
    .pipe(
      merge({
        fileName: "translationMaster.json",
@@ -199,18 +176,14 @@ gulp.task("build-master-translation", function () {
    .pipe(gulp.dest(workDir));
 });

-gulp.task("build-merged-translations", function () {
-  return gulp
+gulp.task("build-merged-translations", () =>
+  gulp
    .src([inFrontendDir + "/*.json", workDir + "/test.json"], {
      allowEmpty: true,
    })
+    .pipe(transform((data, file) => lokaliseTransform(data, data, file)))
    .pipe(
-      transform(function (data, file) {
-        return lokaliseTransform(data, data, file);
-      })
-    )
-    .pipe(
-      foreach(function (stream, file) {
+      foreach((stream, file) => {
        // For each language generate a merged json file. It begins with the master
        // translation as a failsafe for untranslated strings, and merges all parent
        // tags into one file for each specific subtag
@@ -242,17 +215,17 @@ gulp.task("build-merged-translations", function () {
          )
          .pipe(gulp.dest(fullDir));
      })
-    );
-});
+    )
+);

-var taskName;
+let taskName;

 const splitTasks = [];
 TRANSLATION_FRAGMENTS.forEach((fragment) => {
  taskName = "build-translation-fragment-" + fragment;
-  gulp.task(taskName, function () {
+  gulp.task(taskName, () =>
    // Return only the translations for this fragment.
-    return gulp
+    gulp
      .src(fullDir + "/*.json")
      .pipe(
        transform((data) => ({
@@ -263,32 +236,33 @@ TRANSLATION_FRAGMENTS.forEach((fragment) => {
          },
        }))
      )
-      .pipe(gulp.dest(workDir + "/" + fragment));
-  });
+      .pipe(gulp.dest(workDir + "/" + fragment))
+  );
  splitTasks.push(taskName);
 });

 taskName = "build-translation-core";
-gulp.task(taskName, function () {
+gulp.task(taskName, () =>
  // Remove the fragment translations from the core translation.
-  return gulp
+  gulp
    .src(fullDir + "/*.json")
    .pipe(
-      transform((data, file) => {
+      transform((data, _file) => {
        TRANSLATION_FRAGMENTS.forEach((fragment) => {
          delete data.ui.panel[fragment];
        });
+        delete data.supervisor;
        return data;
      })
    )
-    .pipe(gulp.dest(coreDir));
-});
+    .pipe(gulp.dest(coreDir))
+);

 splitTasks.push(taskName);

-gulp.task("build-flattened-translations", function () {
+gulp.task("build-flattened-translations", () =>
  // Flatten the split versions of our translations, and move them into outDir
-  return gulp
+  gulp
    .src(
      TRANSLATION_FRAGMENTS.map(
        (fragment) => workDir + "/" + fragment + "/*.json"
@@ -296,42 +270,45 @@ gulp.task("build-flattened-translations", function () {
      { base: workDir }
    )
    .pipe(
-      transform(function (data) {
+      transform((data) =>
        // Polymer.AppLocalizeBehavior requires flattened json
-        return flatten(data);
-      })
+        flatten(data)
+      )
    )
-    .pipe(minify())
    .pipe(
      rename((filePath) => {
        if (filePath.dirname === "core") {
          filePath.dirname = "";
        }
+        // In dev we create the file with the fake hash in the filename
+        if (!env.isProdBuild()) {
+          filePath.basename += "-dev";
+        }
      })
    )
-    .pipe(gulp.dest(outDir));
-});
+    .pipe(gulp.dest(outDir))
+);

 const fingerprints = {};

-gulp.task(
-  "build-translation-fingerprints",
-  function fingerprintTranslationFiles() {
-    // Fingerprint full file of each language
-    const files = fs.readdirSync(fullDir);
+gulp.task("build-translation-fingerprints", () => {
+  // Fingerprint full file of each language
+  const files = fs.readdirSync(fullDir);

-    for (let i = 0; i < files.length; i++) {
-      fingerprints[files[i].split(".")[0]] = {
-        // In dev we create fake hashes
-        hash: env.isProdBuild()
-          ? crypto
-              .createHash("md5")
-              .update(fs.readFileSync(path.join(fullDir, files[i]), "utf-8"))
-              .digest("hex")
-          : "dev",
-      };
-    }
+  for (let i = 0; i < files.length; i++) {
+    fingerprints[files[i].split(".")[0]] = {
+      // In dev we create fake hashes
+      hash: env.isProdBuild()
+        ? crypto
+            .createHash("md5")
+            .update(fs.readFileSync(path.join(fullDir, files[i]), "utf-8"))
+            .digest("hex")
+        : "dev",
+    };
+  }

+  // In dev we create the file with the fake hash in the filename
+  if (env.isProdBuild()) {
    mapFiles(outDir, ".json", (filename) => {
      const parsed = path.parse(filename);

@@ -347,12 +324,88 @@ gulp.task(
        }`
      );
    });
-
-    const stream = source("translationFingerprints.json");
-    stream.write(JSON.stringify(fingerprints));
-    process.nextTick(() => stream.end());
-    return stream.pipe(vinylBuffer()).pipe(gulp.dest(workDir));
  }
+
+  const stream = source("translationFingerprints.json");
+  stream.write(JSON.stringify(fingerprints));
+  process.nextTick(() => stream.end());
+  return stream.pipe(vinylBuffer()).pipe(gulp.dest(workDir));
+});
+
+gulp.task("build-translation-fragment-supervisor", () =>
+  gulp
+    .src(fullDir + "/*.json")
+    .pipe(transform((data) => data.supervisor))
+    .pipe(
+      rename((filePath) => {
+        // In dev we create the file with the fake hash in the filename
+        if (!env.isProdBuild()) {
+          filePath.basename += "-dev";
+        }
+      })
+    )
+    .pipe(gulp.dest(workDir + "/supervisor"))
+);
+
+gulp.task("build-translation-flatten-supervisor", () =>
+  gulp
+    .src(workDir + "/supervisor/*.json")
+    .pipe(
+      transform((data) =>
+        // Polymer.AppLocalizeBehavior requires flattened json
+        flatten(data)
+      )
+    )
+    .pipe(gulp.dest(outDir))
+);
+
+gulp.task("build-translation-write-metadata", () =>
+  gulp
+    .src(
+      [
+        path.join(paths.translations_src, "translationMetadata.json"),
+        workDir + "/testMetadata.json",
+        workDir + "/translationFingerprints.json",
+      ],
+      { allowEmpty: true }
+    )
+    .pipe(merge({}))
+    .pipe(
+      transform((data) => {
+        const newData = {};
+        Object.entries(data).forEach(([key, value]) => {
+          // Filter out translations without native name.
+          if (value.nativeName) {
+            newData[key] = value;
+          } else {
+            // eslint-disable-next-line no-console
+            console.warn(
+              `Skipping language ${key}. Native name was not translated.`
+            );
+          }
+        });
+        return newData;
+      })
+    )
+    .pipe(
+      transform((data) => ({
+        fragments: TRANSLATION_FRAGMENTS,
+        translations: data,
+      }))
+    )
+    .pipe(rename("translationMetadata.json"))
+    .pipe(gulp.dest(workDir))
+);
+
+gulp.task(
+  "create-translations",
+  gulp.series(
+    env.isProdBuild() ? (done) => done() : "create-test-translation",
+    "build-master-translation",
+    "build-merged-translations",
+    gulp.parallel(...splitTasks),
+    "build-flattened-translations"
+  )
 );

 gulp.task(
@@ -360,48 +413,22 @@ gulp.task(
  gulp.series(
    "clean-translations",
    "ensure-translations-build-dir",
-    env.isProdBuild() ? (done) => done() : "create-test-translation",
-    "build-master-translation",
-    "build-merged-translations",
-    gulp.parallel(...splitTasks),
-    "build-flattened-translations",
+    "create-translations",
    "build-translation-fingerprints",
-    function writeMetadata() {
-      return gulp
-        .src(
-          [
-            path.join(paths.translations_src, "translationMetadata.json"),
-            workDir + "/testMetadata.json",
-            workDir + "/translationFingerprints.json",
-          ],
-          { allowEmpty: true }
-        )
-        .pipe(merge({}))
-        .pipe(
-          transform(function (data) {
-            const newData = {};
-            Object.entries(data).forEach(([key, value]) => {
-              // Filter out translations without native name.
-              if (data[key].nativeName) {
-                newData[key] = data[key];
-              } else {
-                console.warn(
-                  `Skipping language ${key}. Native name was not translated.`
-                );
-              }
-              if (data[key]) newData[key] = value;
-            });
-            return newData;
-          })
-        )
-        .pipe(
-          transform((data) => ({
-            fragments: TRANSLATION_FRAGMENTS,
-            translations: data,
-          }))
-        )
-        .pipe(rename("translationMetadata.json"))
-        .pipe(gulp.dest(workDir));
-    }
+    "build-translation-write-metadata"
+  )
+);
+
+gulp.task(
+  "build-supervisor-translations",
+  gulp.series(
+    "clean-translations",
+    "ensure-translations-build-dir",
+    "build-master-translation",
+    "build-merged-translations",
+    "build-translation-fragment-supervisor",
+    "build-translation-flatten-supervisor",
+    "build-translation-fingerprints",
+    "build-translation-write-metadata"
  )
 );
@@ -0,0 +1,11 @@
+// Tasks to run Rollup
+const gulp = require("gulp");
+const { startDevServer } = require("@web/dev-server");
+
+gulp.task("wds-watch-app", () => {
+  startDevServer({
+    config: {
+      watch: true,
+    },
+  });
+});
@@ -1,4 +1,6 @@
+/* eslint-disable @typescript-eslint/no-var-requires */
 // Tasks to run webpack.
+const fs = require("fs");
 const gulp = require("gulp");
 const webpack = require("webpack");
 const WebpackDevServer = require("webpack-dev-server");
@@ -18,156 +20,168 @@ const bothBuilds = (createConfigFunc, params) => [
  createConfigFunc({ ...params, latestBuild: false }),
 ];

-const runDevServer = ({
+const isWsl =
+  fs.existsSync("/proc/version") &&
+  fs
+    .readFileSync("/proc/version", "utf-8")
+    .toLocaleLowerCase()
+    .includes("microsoft");
+
+/**
+ * @param {{
+ *   compiler: import("webpack").Compiler,
+ *   contentBase: string,
+ *   port: number,
+ *   listenHost?: string
+ * }}
+ */
+const runDevServer = async ({
  compiler,
  contentBase,
  port,
  listenHost = "localhost",
-}) =>
-  new WebpackDevServer(compiler, {
-    open: true,
-    watchContentBase: true,
-    contentBase,
-  }).listen(port, listenHost, function (err) {
-    if (err) {
-      throw err;
-    }
-    // Server listening
-    log("[webpack-dev-server]", `http://localhost:${port}`);
-  });
+}) => {
+  const server = new WebpackDevServer(
+    {
+      open: true,
+      host: listenHost,
+      port,
+      static: {
+        directory: contentBase,
+        watch: true,
+      },
+    },
+    compiler
+  );

-const handler = (done) => (err, stats) => {
+  await server.start();
+  // Server listening
+  log("[webpack-dev-server]", `Project is running at http://localhost:${port}`);
+};
+
+const doneHandler = (done) => (err, stats) => {
  if (err) {
-    console.log(err.stack || err);
+    log.error(err.stack || err);
    if (err.details) {
-      console.log(err.details);
+      log.error(err.details);
    }
    return;
  }

-  log(`Build done @ ${new Date().toLocaleTimeString()}`);
-
  if (stats.hasErrors() || stats.hasWarnings()) {
+    // eslint-disable-next-line no-console
    console.log(stats.toString("minimal"));
  }

+  log(`Build done @ ${new Date().toLocaleTimeString()}`);
+
  if (done) {
    done();
  }
 };

+const prodBuild = (conf) =>
+  new Promise((resolve) => {
+    webpack(
+      conf,
+      // Resolve promise when done. Because we pass a callback, webpack closes itself
+      doneHandler(resolve)
+    );
+  });
+
 gulp.task("webpack-watch-app", () => {
-  // we are not calling done, so this command will run forever
-  webpack(createAppConfig({ isProdBuild: false, latestBuild: true })).watch(
-    { ignored: /build-translations/ },
-    handler()
-  );
+  // This command will run forever because we don't close compiler
+  webpack(
+    process.env.ES5
+      ? bothBuilds(createAppConfig, { isProdBuild: false })
+      : createAppConfig({ isProdBuild: false, latestBuild: true })
+  ).watch({ poll: isWsl }, doneHandler());
  gulp.watch(
    path.join(paths.translations_src, "en.json"),
-    gulp.series("build-translations", "copy-translations")
+    gulp.series("create-translations", "copy-translations-app")
  );
 });

-gulp.task(
-  "webpack-prod-app",
-  () =>
-    new Promise((resolve) =>
-      webpack(
-        bothBuilds(createAppConfig, { isProdBuild: true }),
-        handler(resolve)
-      )
-    )
+gulp.task("webpack-prod-app", () =>
+  prodBuild(
+    bothBuilds(createAppConfig, {
+      isProdBuild: true,
+    })
+  )
 );

-gulp.task("webpack-dev-server-demo", () => {
+gulp.task("webpack-dev-server-demo", () =>
  runDevServer({
    compiler: webpack(bothBuilds(createDemoConfig, { isProdBuild: false })),
-    contentBase: paths.demo_root,
+    contentBase: paths.demo_output_root,
    port: 8090,
-  });
-});
-
-gulp.task(
-  "webpack-prod-demo",
-  () =>
-    new Promise((resolve) =>
-      webpack(
-        bothBuilds(createDemoConfig, {
-          isProdBuild: true,
-        }),
-        handler(resolve)
-      )
-    )
+  })
 );

-gulp.task("webpack-dev-server-cast", () => {
+gulp.task("webpack-prod-demo", () =>
+  prodBuild(
+    bothBuilds(createDemoConfig, {
+      isProdBuild: true,
+    })
+  )
+);
+
+gulp.task("webpack-dev-server-cast", () =>
  runDevServer({
    compiler: webpack(bothBuilds(createCastConfig, { isProdBuild: false })),
-    contentBase: paths.cast_root,
+    contentBase: paths.cast_output_root,
    port: 8080,
    // Accessible from the network, because that's how Cast hits it.
    listenHost: "0.0.0.0",
-  });
-});
+  })
+);

-gulp.task(
-  "webpack-prod-cast",
-  () =>
-    new Promise((resolve) =>
-      webpack(
-        bothBuilds(createCastConfig, {
-          isProdBuild: true,
-        }),
-
-        handler(resolve)
-      )
-    )
+gulp.task("webpack-prod-cast", () =>
+  prodBuild(
+    bothBuilds(createCastConfig, {
+      isProdBuild: true,
+    })
+  )
 );

 gulp.task("webpack-watch-hassio", () => {
-  // we are not calling done, so this command will run forever
+  // This command will run forever because we don't close compiler
  webpack(
    createHassioConfig({
      isProdBuild: false,
-      latestBuild: false,
+      latestBuild: true,
    })
-  ).watch({}, handler());
+  ).watch({ ignored: /build/, poll: isWsl }, doneHandler());
+
+  gulp.watch(
+    path.join(paths.translations_src, "en.json"),
+    gulp.series("build-supervisor-translations", "copy-translations-supervisor")
+  );
 });

-gulp.task(
-  "webpack-prod-hassio",
-  () =>
-    new Promise((resolve) =>
-      webpack(
-        createHassioConfig({
-          isProdBuild: true,
-          latestBuild: false,
-        }),
-        handler(resolve)
-      )
-    )
+gulp.task("webpack-prod-hassio", () =>
+  prodBuild(
+    bothBuilds(createHassioConfig, {
+      isProdBuild: true,
+    })
+  )
 );

-gulp.task("webpack-dev-server-gallery", () => {
+gulp.task("webpack-dev-server-gallery", () =>
  runDevServer({
    // We don't use the es5 build, but the dev server will fuck up the publicPath if we don't
    compiler: webpack(bothBuilds(createGalleryConfig, { isProdBuild: false })),
-    contentBase: paths.gallery_root,
+    contentBase: paths.gallery_output_root,
    port: 8100,
-  });
-});
-
-gulp.task(
-  "webpack-prod-gallery",
-  () =>
-    new Promise((resolve) =>
-      webpack(
-        createGalleryConfig({
-          isProdBuild: true,
-          latestBuild: true,
-        }),
-
-        handler(resolve)
-      )
-    )
+    listenHost: "0.0.0.0",
+  })
+);
+
+gulp.task("webpack-prod-gallery", () =>
+  prodBuild(
+    createGalleryConfig({
+      isProdBuild: true,
+      latestBuild: true,
+    })
+  )
 );
@@ -1,34 +1,47 @@
-var path = require("path");
+/* eslint-disable @typescript-eslint/no-var-requires */
+const path = require("path");

 module.exports = {
  polymer_dir: path.resolve(__dirname, ".."),

  build_dir: path.resolve(__dirname, "../build"),
-  root: path.resolve(__dirname, "../hass_frontend"),
-  static: path.resolve(__dirname, "../hass_frontend/static"),
-  output: path.resolve(__dirname, "../hass_frontend/frontend_latest"),
-  output_es5: path.resolve(__dirname, "../hass_frontend/frontend_es5"),
+  app_output_root: path.resolve(__dirname, "../hass_frontend"),
+  app_output_static: path.resolve(__dirname, "../hass_frontend/static"),
+  app_output_latest: path.resolve(
+    __dirname,
+    "../hass_frontend/frontend_latest"
+  ),
+  app_output_es5: path.resolve(__dirname, "../hass_frontend/frontend_es5"),

  demo_dir: path.resolve(__dirname, "../demo"),
-  demo_root: path.resolve(__dirname, "../demo/dist"),
-  demo_static: path.resolve(__dirname, "../demo/dist/static"),
-  demo_output: path.resolve(__dirname, "../demo/dist/frontend_latest"),
+  demo_output_root: path.resolve(__dirname, "../demo/dist"),
+  demo_output_static: path.resolve(__dirname, "../demo/dist/static"),
+  demo_output_latest: path.resolve(__dirname, "../demo/dist/frontend_latest"),
  demo_output_es5: path.resolve(__dirname, "../demo/dist/frontend_es5"),

  cast_dir: path.resolve(__dirname, "../cast"),
-  cast_root: path.resolve(__dirname, "../cast/dist"),
-  cast_static: path.resolve(__dirname, "../cast/dist/static"),
-  cast_output: path.resolve(__dirname, "../cast/dist/frontend_latest"),
+  cast_output_root: path.resolve(__dirname, "../cast/dist"),
+  cast_output_static: path.resolve(__dirname, "../cast/dist/static"),
+  cast_output_latest: path.resolve(__dirname, "../cast/dist/frontend_latest"),
  cast_output_es5: path.resolve(__dirname, "../cast/dist/frontend_es5"),

  gallery_dir: path.resolve(__dirname, "../gallery"),
-  gallery_root: path.resolve(__dirname, "../gallery/dist"),
-  gallery_output: path.resolve(__dirname, "../gallery/dist/frontend_latest"),
-  gallery_static: path.resolve(__dirname, "../gallery/dist/static"),
+  gallery_output_root: path.resolve(__dirname, "../gallery/dist"),
+  gallery_output_latest: path.resolve(
+    __dirname,
+    "../gallery/dist/frontend_latest"
+  ),
+  gallery_output_static: path.resolve(__dirname, "../gallery/dist/static"),

  hassio_dir: path.resolve(__dirname, "../hassio"),
-  hassio_root: path.resolve(__dirname, "../hassio/build"),
-  hassio_publicPath: "/api/hassio/app/",
+  hassio_output_root: path.resolve(__dirname, "../hassio/build"),
+  hassio_output_static: path.resolve(__dirname, "../hassio/build/static"),
+  hassio_output_latest: path.resolve(
+    __dirname,
+    "../hassio/build/frontend_latest"
+  ),
+  hassio_output_es5: path.resolve(__dirname, "../hassio/build/frontend_es5"),
+  hassio_publicPath: "/api/hassio/app",

  translations_src: path.resolve(__dirname, "../src/translations"),
 };
@@ -0,0 +1 @@
+[]
@@ -0,0 +1,14 @@
+module.exports = function (opts = {}) {
+  const dontHash = opts.dontHash || new Set();
+
+  return {
+    name: "dont-hash",
+    renderChunk(_code, chunk, _options) {
+      if (!chunk.isEntry || !dontHash.has(chunk.name)) {
+        return null;
+      }
+      chunk.fileName = `${chunk.name}.js`;
+      return null;
+    },
+  };
+};
@@ -0,0 +1,24 @@
+module.exports = function (userOptions = {}) {
+  // Files need to be absolute paths.
+  // This only works if the file has no exports
+  // and only is imported for its side effects
+  const files = userOptions.files || [];
+
+  if (files.length === 0) {
+    return {
+      name: "ignore",
+    };
+  }
+
+  return {
+    name: "ignore",
+
+    load(id) {
+      return files.some((toIgnorePath) => id.startsWith(toIgnorePath))
+        ? {
+            code: "",
+          }
+        : null;
+    },
+  };
+};
@@ -0,0 +1,34 @@
+const url = require("url");
+
+const defaultOptions = {
+  publicPath: "",
+};
+
+module.exports = function (userOptions = {}) {
+  const options = { ...defaultOptions, ...userOptions };
+
+  return {
+    name: "manifest",
+    generateBundle(outputOptions, bundle) {
+      const manifest = {};
+
+      for (const chunk of Object.values(bundle)) {
+        if (!chunk.isEntry) {
+          continue;
+        }
+        // Add js extension to mimic Webpack manifest.
+        manifest[`${chunk.name}.js`] = url.resolve(
+          options.publicPath,
+          chunk.fileName
+        );
+      }
+
+      this.emitFile({
+        type: "asset",
+        source: JSON.stringify(manifest, undefined, 2),
+        name: "manifest.json",
+        fileName: "manifest.json",
+      });
+    },
+  };
+};
@@ -0,0 +1,149 @@
+// Worker plugin
+// Each worker will include all of its dependencies
+// instead of relying on an importer.
+
+// Forked from v.1.4.1
+// https://github.com/surma/rollup-plugin-off-main-thread
+/**
+ * Copyright 2018 Google Inc. All Rights Reserved.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+const rollup = require("rollup");
+const path = require("path");
+const MagicString = require("magic-string");
+
+const defaultOpts = {
+  // A RegExp to find `new Workers()` calls. The second capture group _must_
+  // capture the provided file name without the quotes.
+  workerRegexp: /new Worker\((["'])(.+?)\1(,[^)]+)?\)/g,
+  plugins: ["node-resolve", "commonjs", "babel", "terser", "ignore"],
+};
+
+async function getBundledWorker(workerPath, rollupOptions) {
+  const bundle = await rollup.rollup({
+    ...rollupOptions,
+    input: {
+      worker: workerPath,
+    },
+  });
+  const { output } = await bundle.generate({
+    // Generates cleanest output, we shouldn't have any imports/exports
+    // that would be incompatible with ES5.
+    format: "es",
+    // We should not export anything. This will fail build if we are.
+    exports: "none",
+  });
+
+  let code;
+
+  for (const chunkOrAsset of output) {
+    if (chunkOrAsset.name === "worker") {
+      code = chunkOrAsset.code;
+    } else if (chunkOrAsset.type !== "asset") {
+      throw new Error("Unexpected extra output");
+    }
+  }
+
+  return code;
+}
+
+module.exports = function (opts = {}) {
+  opts = { ...defaultOpts, ...opts };
+
+  let rollupOptions;
+  let refIds;
+
+  return {
+    name: "hass-worker",
+
+    async buildStart(options) {
+      refIds = {};
+      rollupOptions = {
+        plugins: options.plugins.filter((plugin) =>
+          opts.plugins.includes(plugin.name)
+        ),
+      };
+    },
+
+    async transform(code, id) {
+      // Copy the regexp as they are stateful and this hook is async.
+      const workerRegexp = new RegExp(
+        opts.workerRegexp.source,
+        opts.workerRegexp.flags
+      );
+      if (!workerRegexp.test(code)) {
+        return;
+      }
+
+      const ms = new MagicString(code);
+      // Reset the regexp
+      workerRegexp.lastIndex = 0;
+      while (true) {
+        const match = workerRegexp.exec(code);
+        if (!match) {
+          break;
+        }
+
+        const workerFile = match[2];
+        let optionsObject = {};
+        // Parse the optional options object
+        if (match[3] && match[3].length > 0) {
+          // FIXME: ooooof!
+          optionsObject = new Function(`return ${match[3].slice(1)};`)();
+        }
+        delete optionsObject.type;
+
+        if (!new RegExp("^.*/").test(workerFile)) {
+          this.warn(
+            `Paths passed to the Worker constructor must be relative or absolute, i.e. start with /, ./ or ../ (just like dynamic import!). Ignoring "${workerFile}".`
+          );
+          continue;
+        }
+
+        // Find worker file and store it as a chunk with ID prefixed for our loader
+        const resolvedWorkerFile = (await this.resolve(workerFile, id)).id;
+        let chunkRefId;
+        if (resolvedWorkerFile in refIds) {
+          chunkRefId = refIds[resolvedWorkerFile];
+        } else {
+          this.addWatchFile(resolvedWorkerFile);
+          const source = await getBundledWorker(
+            resolvedWorkerFile,
+            rollupOptions
+          );
+          chunkRefId = refIds[resolvedWorkerFile] = this.emitFile({
+            name: path.basename(resolvedWorkerFile),
+            source,
+            type: "asset",
+          });
+        }
+
+        const workerParametersStartIndex = match.index + "new Worker(".length;
+        const workerParametersEndIndex =
+          match.index + match[0].length - ")".length;
+
+        ms.overwrite(
+          workerParametersStartIndex,
+          workerParametersEndIndex,
+          `import.meta.ROLLUP_FILE_URL_${chunkRefId}, ${JSON.stringify(
+            optionsObject
+          )}`
+        );
+      }
+
+      return {
+        code: ms.toString(),
+        map: ms.generateMap({ hires: true }),
+      };
+    },
+  };
+};
@@ -0,0 +1,139 @@
+/* eslint-disable @typescript-eslint/no-var-requires */
+const path = require("path");
+
+const commonjs = require("@rollup/plugin-commonjs");
+const resolve = require("@rollup/plugin-node-resolve");
+const json = require("@rollup/plugin-json");
+const babel = require("@rollup/plugin-babel").babel;
+const replace = require("@rollup/plugin-replace");
+const visualizer = require("rollup-plugin-visualizer");
+const { string } = require("rollup-plugin-string");
+const { terser } = require("rollup-plugin-terser");
+const manifest = require("./rollup-plugins/manifest-plugin");
+const worker = require("./rollup-plugins/worker-plugin");
+const dontHashPlugin = require("./rollup-plugins/dont-hash-plugin");
+const ignore = require("./rollup-plugins/ignore-plugin");
+
+const bundle = require("./bundle");
+const paths = require("./paths");
+
+const extensions = [".js", ".ts"];
+
+/**
+ * @param {Object} arg
+ * @param { import("rollup").InputOption } arg.input
+ */
+const createRollupConfig = ({
+  entry,
+  outputPath,
+  defineOverlay,
+  isProdBuild,
+  latestBuild,
+  isStatsBuild,
+  publicPath,
+  dontHash,
+  isWDS,
+}) => ({
+  /**
+   * @type { import("rollup").InputOptions }
+   */
+  inputOptions: {
+    input: entry,
+    // Some entry points contain no JavaScript. This setting silences a warning about that.
+    // https://rollupjs.org/guide/en/#preserveentrysignatures
+    preserveEntrySignatures: false,
+    plugins: [
+      ignore({
+        files: bundle.emptyPackages({ latestBuild }),
+      }),
+      resolve({
+        extensions,
+        preferBuiltins: false,
+        browser: true,
+        rootDir: paths.polymer_dir,
+      }),
+      commonjs(),
+      json(),
+      babel({
+        ...bundle.babelOptions({ latestBuild }),
+        extensions,
+        babelHelpers: isWDS ? "inline" : "bundled",
+      }),
+      string({
+        // Import certain extensions as strings
+        include: [path.join(paths.polymer_dir, "node_modules/**/*.css")],
+      }),
+      replace(bundle.definedVars({ isProdBuild, latestBuild, defineOverlay })),
+      !isWDS &&
+        manifest({
+          publicPath,
+        }),
+      !isWDS && worker(),
+      !isWDS && dontHashPlugin({ dontHash }),
+      !isWDS && isProdBuild && terser(bundle.terserOptions(latestBuild)),
+      !isWDS &&
+        isStatsBuild &&
+        visualizer({
+          // https://github.com/btd/rollup-plugin-visualizer#options
+          open: true,
+          sourcemap: true,
+        }),
+    ].filter(Boolean),
+  },
+  /**
+   * @type { import("rollup").OutputOptions }
+   */
+  outputOptions: {
+    // https://rollupjs.org/guide/en/#outputdir
+    dir: outputPath,
+    // https://rollupjs.org/guide/en/#outputformat
+    format: latestBuild ? "es" : "systemjs",
+    // https://rollupjs.org/guide/en/#outputexternallivebindings
+    externalLiveBindings: false,
+    // https://rollupjs.org/guide/en/#outputentryfilenames
+    // https://rollupjs.org/guide/en/#outputchunkfilenames
+    // https://rollupjs.org/guide/en/#outputassetfilenames
+    entryFileNames:
+      isProdBuild && !isStatsBuild ? "[name]-[hash].js" : "[name].js",
+    chunkFileNames: isProdBuild && !isStatsBuild ? "c.[hash].js" : "[name].js",
+    assetFileNames: isProdBuild && !isStatsBuild ? "a.[hash].js" : "[name].js",
+    // https://rollupjs.org/guide/en/#outputsourcemap
+    sourcemap: isProdBuild ? true : "inline",
+  },
+});
+
+const createAppConfig = ({ isProdBuild, latestBuild, isStatsBuild, isWDS }) =>
+  createRollupConfig(
+    bundle.config.app({
+      isProdBuild,
+      latestBuild,
+      isStatsBuild,
+      isWDS,
+    })
+  );
+
+const createDemoConfig = ({ isProdBuild, latestBuild, isStatsBuild }) =>
+  createRollupConfig(
+    bundle.config.demo({
+      isProdBuild,
+      latestBuild,
+      isStatsBuild,
+    })
+  );
+
+const createCastConfig = ({ isProdBuild, latestBuild }) =>
+  createRollupConfig(bundle.config.cast({ isProdBuild, latestBuild }));
+
+const createHassioConfig = ({ isProdBuild, latestBuild }) =>
+  createRollupConfig(bundle.config.hassio({ isProdBuild, latestBuild }));
+
+const createGalleryConfig = ({ isProdBuild, latestBuild }) =>
+  createRollupConfig(bundle.config.gallery({ isProdBuild, latestBuild }));
+
+module.exports = {
+  createAppConfig,
+  createDemoConfig,
+  createCastConfig,
+  createHassioConfig,
+  createGalleryConfig,
+};
@@ -1,3 +1,4 @@
+/* eslint-disable @typescript-eslint/no-var-requires */
 const path = require("path");
 const fs = require("fs");

@@ -1,15 +1,31 @@
+/* eslint-disable @typescript-eslint/no-var-requires */
 const webpack = require("webpack");
 const path = require("path");
 const TerserPlugin = require("terser-webpack-plugin");
-const ManifestPlugin = require("webpack-manifest-plugin");
-const WorkerPlugin = require("worker-plugin");
+const { WebpackManifestPlugin } = require("webpack-manifest-plugin");
 const paths = require("./paths.js");
-const env = require("./env.js");
-const { babelLoaderConfig } = require("./babel.js");
+const bundle = require("./bundle.js");
+const log = require("fancy-log");
+const WebpackBar = require("webpackbar");
+
+class LogStartCompilePlugin {
+  ignoredFirst = false;
+
+  apply(compiler) {
+    compiler.hooks.beforeCompile.tap("LogStartCompilePlugin", () => {
+      if (!this.ignoredFirst) {
+        this.ignoredFirst = true;
+        return;
+      }
+      log("Changes detected. Starting compilation");
+    });
+  }
+}

 const createWebpackConfig = ({
  entry,
-  outputRoot,
+  outputPath,
+  publicPath,
  defineOverlay,
  isProdBuild,
  latestBuild,
@@ -19,190 +35,146 @@ const createWebpackConfig = ({
  if (!dontHash) {
    dontHash = new Set();
  }
+  const ignorePackages = bundle.ignorePackages({ latestBuild });
  return {
    mode: isProdBuild ? "production" : "development",
+    target: ["web", latestBuild ? "es2017" : "es5"],
    devtool: isProdBuild
      ? "cheap-module-source-map"
      : "eval-cheap-module-source-map",
    entry,
+    node: false,
    module: {
      rules: [
-        babelLoaderConfig({ latestBuild }),
+        {
+          test: /\.m?js$|\.ts$/,
+          use: {
+            loader: "babel-loader",
+            options: {
+              ...bundle.babelOptions({ latestBuild }),
+              cacheDirectory: !isProdBuild,
+              cacheCompression: false,
+            },
+          },
+        },
        {
          test: /\.css$/,
-          use: "raw-loader",
+          type: "asset/source",
        },
      ],
    },
-    externals: {
-      esprima: "esprima",
-    },
    optimization: {
      minimizer: [
        new TerserPlugin({
-          cache: true,
          parallel: true,
          extractComments: true,
-          sourceMap: true,
-          terserOptions: {
-            safari10: true,
-            ecma: latestBuild ? undefined : 5,
-          },
+          terserOptions: bundle.terserOptions(latestBuild),
        }),
      ],
+      moduleIds: isProdBuild && !isStatsBuild ? "deterministic" : "named",
+      chunkIds: isProdBuild && !isStatsBuild ? "deterministic" : "named",
    },
    plugins: [
-      new WorkerPlugin(),
-      new ManifestPlugin(),
-      new webpack.DefinePlugin({
-        __DEV__: !isProdBuild,
-        __BUILD__: JSON.stringify(latestBuild ? "latest" : "es5"),
-        __VERSION__: JSON.stringify(env.version()),
-        __DEMO__: false,
-        __BACKWARDS_COMPAT__: false,
-        __STATIC_PATH__: "/static/",
-        "process.env.NODE_ENV": JSON.stringify(
-          isProdBuild ? "production" : "development"
-        ),
-        ...defineOverlay,
+      new WebpackBar({ fancy: !isProdBuild }),
+      new WebpackManifestPlugin({
+        // Only include the JS of entrypoints
+        filter: (file) => file.isInitial && !file.name.endsWith(".map"),
+      }),
+      new webpack.DefinePlugin(
+        bundle.definedVars({ isProdBuild, latestBuild, defineOverlay })
+      ),
+      new webpack.IgnorePlugin({
+        checkResource(resource, context) {
+          // Only use ignore to intercept imports that we don't control
+          // inside node_module dependencies.
+          if (
+            !context.includes("/node_modules/") ||
+            // calling define.amd will call require("!!webpack amd options")
+            resource.startsWith("!!webpack") ||
+            // loaded by webpack dev server but doesn't exist.
+            resource === "webpack/hot"
+          ) {
+            return false;
+          }
+          let fullPath;
+          try {
+            fullPath = resource.startsWith(".")
+              ? path.resolve(context, resource)
+              : require.resolve(resource);
+          } catch (err) {
+            // eslint-disable-next-line no-console
+            console.error(
+              "Error in Home Assistant ignore plugin",
+              resource,
+              context
+            );
+            throw err;
+          }
+
+          return ignorePackages.some((toIgnorePath) =>
+            fullPath.startsWith(toIgnorePath)
+          );
+        },
      }),
-      // Ignore moment.js locales
-      new webpack.IgnorePlugin(/^\.\/locale$/, /moment$/),
-      // Color.js is bloated, it contains all color definitions for all material color sets.
      new webpack.NormalModuleReplacementPlugin(
-        /@polymer\/paper-styles\/color\.js$/,
-        path.resolve(paths.polymer_dir, "src/util/empty.js")
-      ),
-      // Ignore roboto pointing at CDN. We use local font-roboto-local.
-      new webpack.NormalModuleReplacementPlugin(
-        /@polymer\/font-roboto\/roboto\.js$/,
-        path.resolve(paths.polymer_dir, "src/util/empty.js")
-      ),
-      new webpack.NormalModuleReplacementPlugin(
-        /@vaadin\/vaadin-material-styles\/font-roboto\.js$/,
-        path.resolve(paths.polymer_dir, "src/util/empty.js")
-      ),
-      // Ignore mwc icons pointing at CDN.
-      new webpack.NormalModuleReplacementPlugin(
-        /@material\/mwc-icon\/mwc-icon-font\.js$/,
+        new RegExp(bundle.emptyPackages({ latestBuild }).join("|")),
        path.resolve(paths.polymer_dir, "src/util/empty.js")
      ),
+      !isProdBuild && new LogStartCompilePlugin(),
    ].filter(Boolean),
    resolve: {
      extensions: [".ts", ".js", ".json"],
+      alias: {
+        "lit/decorators$": "lit/decorators.js",
+        "lit/directive$": "lit/directive.js",
+        "lit/directives/until$": "lit/directives/until.js",
+        "lit/directives/class-map$": "lit/directives/class-map.js",
+        "lit/directives/style-map$": "lit/directives/style-map.js",
+        "lit/directives/if-defined$": "lit/directives/if-defined.js",
+        "lit/directives/guard$": "lit/directives/guard.js",
+        "lit/directives/cache$": "lit/directives/cache.js",
+        "lit/directives/repeat$": "lit/directives/repeat.js",
+        "lit/polyfill-support$": "lit/polyfill-support.js",
+      },
    },
    output: {
      filename: ({ chunk }) => {
-        if (!isProdBuild || dontHash.has(chunk.name)) {
+        if (!isProdBuild || isStatsBuild || dontHash.has(chunk.name)) {
          return `${chunk.name}.js`;
        }
        return `${chunk.name}.${chunk.hash.substr(0, 8)}.js`;
      },
      chunkFilename:
-        isProdBuild && !isStatsBuild
-          ? "chunk.[chunkhash].js"
-          : "[name].chunk.js",
-      path: path.resolve(
-        outputRoot,
-        latestBuild ? "frontend_latest" : "frontend_es5"
-      ),
-      publicPath: latestBuild ? "/frontend_latest/" : "/frontend_es5/",
+        isProdBuild && !isStatsBuild ? "[chunkhash:8].js" : "[id].chunk.js",
+      path: outputPath,
+      publicPath,
      // To silence warning in worker plugin
      globalObject: "self",
    },
+    experiments: {
+      topLevelAwait: true,
+    },
  };
 };

-const createAppConfig = ({ isProdBuild, latestBuild, isStatsBuild }) => {
-  return createWebpackConfig({
-    entry: {
-      service_worker: "./src/entrypoints/service_worker.ts",
-      app: "./src/entrypoints/app.ts",
-      authorize: "./src/entrypoints/authorize.ts",
-      onboarding: "./src/entrypoints/onboarding.ts",
-      core: "./src/entrypoints/core.ts",
-      compatibility: "./src/entrypoints/compatibility.ts",
-      "custom-panel": "./src/entrypoints/custom-panel.ts",
-    },
-    outputRoot: paths.root,
-    isProdBuild,
-    latestBuild,
-    isStatsBuild,
-  });
-};
+const createAppConfig = ({ isProdBuild, latestBuild, isStatsBuild }) =>
+  createWebpackConfig(
+    bundle.config.app({ isProdBuild, latestBuild, isStatsBuild })
+  );

-const createDemoConfig = ({ isProdBuild, latestBuild, isStatsBuild }) => {
-  return createWebpackConfig({
-    entry: {
-      main: path.resolve(paths.demo_dir, "src/entrypoint.ts"),
-      compatibility: path.resolve(
-        paths.polymer_dir,
-        "src/entrypoints/compatibility.ts"
-      ),
-    },
-    outputRoot: paths.demo_root,
-    defineOverlay: {
-      __VERSION__: JSON.stringify(`DEMO-${env.version()}`),
-      __DEMO__: true,
-    },
-    isProdBuild,
-    latestBuild,
-    isStatsBuild,
-  });
-};
+const createDemoConfig = ({ isProdBuild, latestBuild, isStatsBuild }) =>
+  createWebpackConfig(
+    bundle.config.demo({ isProdBuild, latestBuild, isStatsBuild })
+  );

-const createCastConfig = ({ isProdBuild, latestBuild }) => {
-  const entry = {
-    launcher: path.resolve(paths.cast_dir, "src/launcher/entrypoint.ts"),
-  };
+const createCastConfig = ({ isProdBuild, latestBuild }) =>
+  createWebpackConfig(bundle.config.cast({ isProdBuild, latestBuild }));

-  if (latestBuild) {
-    entry.receiver = path.resolve(paths.cast_dir, "src/receiver/entrypoint.ts");
-  }
+const createHassioConfig = ({ isProdBuild, latestBuild }) =>
+  createWebpackConfig(bundle.config.hassio({ isProdBuild, latestBuild }));

-  return createWebpackConfig({
-    entry,
-    outputRoot: paths.cast_root,
-    isProdBuild,
-    latestBuild,
-    defineOverlay: {
-      __BACKWARDS_COMPAT__: true,
-    },
-  });
-};
-
-const createHassioConfig = ({ isProdBuild, latestBuild }) => {
-  if (latestBuild) {
-    throw new Error("Hass.io does not support latest build!");
-  }
-  const config = createWebpackConfig({
-    entry: {
-      entrypoint: path.resolve(paths.hassio_dir, "src/entrypoint.ts"),
-    },
-    outputRoot: "",
-    isProdBuild,
-    latestBuild,
-    dontHash: new Set(["entrypoint"]),
-  });
-
-  config.output.path = paths.hassio_root;
-  config.output.publicPath = paths.hassio_publicPath;
-
-  return config;
-};
-
-const createGalleryConfig = ({ isProdBuild, latestBuild }) => {
-  const config = createWebpackConfig({
-    entry: {
-      entrypoint: path.resolve(paths.gallery_dir, "src/entrypoint.js"),
-    },
-    outputRoot: paths.gallery_root,
-    isProdBuild,
-    latestBuild,
-  });
-
-  return config;
-};
+const createGalleryConfig = ({ isProdBuild, latestBuild }) =>
+  createWebpackConfig(bundle.config.gallery({ isProdBuild, latestBuild }));

 module.exports = {
  createAppConfig,
@@ -0,0 +1,10 @@
+const rollup = require("../build-scripts/rollup.js");
+const env = require("../build-scripts/env.js");
+
+const config = rollup.createCastConfig({
+  isProdBuild: env.isProdBuild(),
+  latestBuild: true,
+  isStatsBuild: env.isStatsBuild(),
+});
+
+module.exports = { ...config.inputOptions, output: config.outputOptions };
@@ -37,18 +37,21 @@
  <body>
    <%= renderTemplate('_js_base') %>

-    <script type="module" crossorigin="use-credentials">
-      import "<%= latestLauncherJS %>";
+    <script>
+      import("<%= latestLauncherJS %>");
+      window.latestJS = true;
    </script>

-    <script nomodule>
-      (function() {
-        // // Safari 10.1 supports type=module but ignores nomodule, so we add this check.
-        if (!isS101) {
-          _ls("/static/polyfills/custom-elements-es5-adapter.js");
+    <script>
+      if (!window.latestJS) {
+        <% if (useRollup) { %>
+          _ls("/static/js/s.min.js").onload = function() {
+            System.import("<%= es5LauncherJS %>");
+          };
+        <% } else { %>
          _ls("<%= es5LauncherJS %>");
-        }
-      })();
+        <% } %>
+      }
    </script>

    <hc-layout subtitle="FAQ">
@@ -136,7 +139,7 @@
          Your authentication credentials or Home Assistant url are never sent
          to the Cloud. You can validate this behavior in
          <a
-            href="https://github.com/home-assistant/home-assistant-polymer/tree/dev/cast"
+            href="https://github.com/home-assistant/frontend/tree/dev/cast"
            target="_blank"
            >the source code</a
          >.
@@ -209,13 +212,8 @@
          Chromecast is a technology developed by Google, and is available on:
        </p>
        <ul>
-          <li>Google Chrome (all platforms except on iOS)</li>
-          <li>
-            Microsoft Edge (all platforms,
-            <a href="https://www.microsoftedgeinsider.com" target="_blank"
-              >dev and canary builds only</a
-            >)
-          </li>
+          <li>Google Chrome (all platforms except iOS)</li>
+          <li>Microsoft Edge (all platforms)</li>
        </ul>
      </div>

@@ -248,7 +246,7 @@ http:

    <script>
      var _gaq = [["_setAccount", "UA-57927901-9"], ["_trackPageview"]];
-      (function(d, t) {
+      (function (d, t) {
        var g = d.createElement(t),
          s = d.getElementsByTagName(t)[0];
        g.src =
@@ -28,18 +28,21 @@

    <hc-connect></hc-connect>

-    <script type="module" crossorigin="use-credentials">
-      import "<%= latestLauncherJS %>";
+    <script>
+      import("<%= latestLauncherJS %>");
+      window.latestJS = true;
    </script>

-    <script nomodule>
-      (function() {
-        // // Safari 10.1 supports type=module but ignores nomodule, so we add this check.
-        if (!isS101) {
-          _ls("/static/polyfills/custom-elements-es5-adapter.js");
+    <script>
+      if (!window.latestJS) {
+        <% if (useRollup) { %>
+          _ls("/static/js/s.min.js").onload = function() {
+            System.import("<%= es5LauncherJS %>");
+          };
+        <% } else { %>
          _ls("<%= es5LauncherJS %>");
-        }
-      })();
+        <% } %>
+      }
    </script>
    <script>
    (function(i,s,o,g,r,a,m){i['GoogleAnalyticsObject']=r;i[r]=i[r]||function(){
@@ -0,0 +1,46 @@
+<!DOCTYPE html>
+<html>
+  <head>
+    <script src="//www.gstatic.com/cast/sdk/libs/caf_receiver/v3/cast_receiver_framework.js"></script>
+    <style>
+      body {
+        --logo-image: url('https://www.home-assistant.io/images/home-assistant-logo.svg');
+        --logo-repeat: no-repeat;
+        --playback-logo-image: url('https://www.home-assistant.io/images/home-assistant-logo.svg');
+        --theme-hue: 200;
+        --progress-color: #03a9f4;
+        --splash-image: url('https://home-assistant.io/images/cast/splash.png');
+        --splash-size: cover;
+        --background-color: #41bdf5;
+      }
+    </style>
+    <script>
+      var _gaq=[['_setAccount','UA-57927901-10'],['_trackPageview']];
+      (function(d,t){var g=d.createElement(t),s=d.getElementsByTagName(t)[0];
+      g.src=('https:'==location.protocol?'//ssl':'//www')+'.google-analytics.com/ga.js';
+      s.parentNode.insertBefore(g,s)}(document,'script'));
+    </script>
+  </head>
+  <body>
+    <%= renderTemplate('_js_base') %>
+
+    <cast-media-player></cast-media-player>
+
+    <script>
+      import("<%= latestMediaJS %>");
+      window.latestJS = true;
+    </script>
+
+    <script>
+      if (!window.latestJS) {
+        <% if (useRollup) { %>
+          _ls("/static/js/s.min.js").onload = function() {
+            System.import("<%= es5MediaJS %>");
+          };
+        <% } else { %>
+          _ls("<%= es5MediaJS %>");
+        <% } %>
+      }
+    </script>
+  </body>
+</html>
@@ -1,3 +1,4 @@
+import "../../../src/resources/safari-14-attachshadow-patch";
 import "../../../src/resources/ha-style";
 import "../../../src/resources/roboto";
 import "./layout/hc-connect";
@@ -1,15 +1,10 @@
+import "@material/mwc-button/mwc-button";
+import { mdiCast, mdiCastConnected } from "@mdi/js";
 import "@polymer/paper-item/paper-icon-item";
 import "@polymer/paper-listbox/paper-listbox";
 import { Auth, Connection } from "home-assistant-js-websocket";
-import {
-  css,
-  CSSResult,
-  customElement,
-  html,
-  LitElement,
-  property,
-  TemplateResult,
-} from "lit-element";
+import { css, CSSResultGroup, html, LitElement, TemplateResult } from "lit";
+import { customElement, property, state } from "lit/decorators";
 import { CastManager } from "../../../../src/cast/cast_manager";
 import {
  castSendShowLovelaceView,
@@ -23,15 +18,15 @@ import {
 import { atLeastVersion } from "../../../../src/common/config/version";
 import { toggleAttribute } from "../../../../src/common/dom/toggle_attribute";
 import "../../../../src/components/ha-icon";
+import "../../../../src/components/ha-svg-icon";
 import {
  getLegacyLovelaceCollection,
  getLovelaceCollection,
  LovelaceConfig,
 } from "../../../../src/data/lovelace";
-import "../../../../src/layouts/loading-screen";
+import "../../../../src/layouts/hass-loading-screen";
 import { generateDefaultViewConfig } from "../../../../src/panels/lovelace/common/generate-lovelace-config";
 import "./hc-layout";
-import "@material/mwc-button/mwc-button";

@customElement("hc-cast")
 class HcCast extends LitElement {
@@ -41,21 +36,19 @@ class HcCast extends LitElement {

  @property() public castManager!: CastManager;

-  @property() private askWrite = false;
+  @state() private askWrite = false;

-  @property() private lovelaceConfig?: LovelaceConfig | null;
+  @state() private lovelaceConfig?: LovelaceConfig | null;

  protected render(): TemplateResult {
    if (this.lovelaceConfig === undefined) {
-      return html` <loading-screen></loading-screen>> `;
+      return html`<hass-loading-screen no-toolbar></hass-loading-screen>`;
    }

    const error =
      this.castManager.castState === "NO_DEVICES_AVAILABLE"
        ? html`
-            <p>
-              There were no suitable Chromecast devices to cast to found.
-            </p>
+            <p>There were no suitable Chromecast devices to cast to found.</p>
          `
        : undefined;

@@ -82,7 +75,7 @@ class HcCast extends LitElement {
          ? html`
              <p class="center-item">
                <mwc-button raised @click=${this._handleLaunch}>
-                  <ha-icon icon="hass:cast"></ha-icon>
+                  <ha-svg-icon .path=${mdiCast}></ha-svg-icon>
                  Start Casting
                </mwc-button>
              </p>
@@ -120,7 +113,7 @@ class HcCast extends LitElement {
          ${this.castManager.status
            ? html`
                <mwc-button @click=${this._handleLaunch}>
-                  <ha-icon icon="hass:cast-connected"></ha-icon>
+                  <ha-svg-icon .path=${mdiCastConnected}></ha-svg-icon>
                  Manage
                </mwc-button>
              `
@@ -200,12 +193,12 @@ class HcCast extends LitElement {
      }
      this.connection.close();
      location.reload();
-    } catch (err) {
+    } catch (err: any) {
      alert("Unable to log out!");
    }
  }

-  static get styles(): CSSResult {
+  static get styles(): CSSResultGroup {
    return css`
      .center-item {
        display: flex;
@@ -242,7 +235,7 @@ class HcCast extends LitElement {
        color: var(--secondary-text-color);
      }

-      mwc-button ha-icon {
+      mwc-button ha-svg-icon {
        margin-right: 8px;
        height: 18px;
      }
@@ -1,4 +1,5 @@
 import "@material/mwc-button";
+import { mdiCastConnected, mdiCast } from "@mdi/js";
 import "@polymer/paper-input/paper-input";
 import {
  Auth,
@@ -11,23 +12,16 @@ import {
  getAuth,
  getAuthOptions,
 } from "home-assistant-js-websocket";
-import {
-  css,
-  CSSResult,
-  customElement,
-  html,
-  LitElement,
-  property,
-  TemplateResult,
-} from "lit-element";
+import { css, CSSResultGroup, html, LitElement, TemplateResult } from "lit";
+import { customElement, state } from "lit/decorators";
 import { CastManager, getCastManager } from "../../../../src/cast/cast_manager";
 import { castSendShowDemo } from "../../../../src/cast/receiver_messages";
 import {
  loadTokens,
  saveTokens,
 } from "../../../../src/common/auth/token_storage";
-import "../../../../src/components/ha-icon";
-import "../../../../src/layouts/loading-screen";
+import "../../../../src/components/ha-svg-icon";
+import "../../../../src/layouts/hass-loading-screen";
 import { registerServiceWorker } from "../../../../src/util/register-service-worker";
 import "./hc-layout";

@@ -60,19 +54,19 @@ const INTRO = html`

@customElement("hc-connect")
 export class HcConnect extends LitElement {
-  @property() private loading = false;
+  @state() private loading = false;

  // If we had stored credentials but we cannot connect,
  // show a screen asking retry or logout.
-  @property() private cannotConnect = false;
+  @state() private cannotConnect = false;

-  @property() private error?: string | TemplateResult;
+  @state() private error?: string | TemplateResult;

-  @property() private auth?: Auth;
+  @state() private auth?: Auth;

-  @property() private connection?: Connection;
+  @state() private connection?: Connection;

-  @property() private castManager?: CastManager | null;
+  @state() private castManager?: CastManager | null;

  private openDemo = false;

@@ -86,9 +80,7 @@ export class HcConnect extends LitElement {
          </div>
          <div class="card-actions">
            <a href="/">
-              <mwc-button>
-                Retry
-              </mwc-button>
+              <mwc-button> Retry </mwc-button>
            </a>
            <div class="spacer"></div>
            <mwc-button @click=${this._handleLogout}>Log out</mwc-button>
@@ -98,7 +90,7 @@ export class HcConnect extends LitElement {
    }

    if (this.castManager === undefined || this.loading) {
-      return html` <loading-screen></loading-screen> `;
+      return html` <hass-loading-screen no-toolbar></hass-loading-screen> `;
    }

    if (this.castManager === null) {
@@ -136,11 +128,11 @@ export class HcConnect extends LitElement {
          <div class="card-actions">
            <mwc-button @click=${this._handleDemo}>
              Show Demo
-              <ha-icon
-                .icon=${this.castManager.castState === "CONNECTED"
-                  ? "hass:cast-connected"
-                  : "hass:cast"}
-              ></ha-icon>
+              <ha-svg-icon
+                .path=${this.castManager.castState === "CONNECTED"
+                  ? mdiCastConnected
+                  : mdiCast}
+              ></ha-svg-icon>
            </mwc-button>
            <div class="spacer"></div>
            <mwc-button @click=${this._handleConnect}>Authorize</mwc-button>
@@ -221,7 +213,7 @@ export class HcConnect extends LitElement {
    let url: URL;
    try {
      url = new URL(value);
-    } catch (err) {
+    } catch (err: any) {
      this.error = "Invalid URL";
      return;
    }
@@ -249,7 +241,7 @@ export class HcConnect extends LitElement {
    try {
      this.loading = true;
      auth = await getAuth(options);
-    } catch (err) {
+    } catch (err: any) {
      if (init === "saved-tokens" && err === ERR_CANNOT_CONNECT) {
        this.cannotConnect = true;
        return;
@@ -268,7 +260,7 @@ export class HcConnect extends LitElement {

    try {
      conn = await createConnection({ auth });
-    } catch (err) {
+    } catch (err: any) {
      // In case of saved tokens, silently solve problems.
      if (init === "saved-tokens") {
        if (err === ERR_CANNOT_CONNECT) {
@@ -294,12 +286,12 @@ export class HcConnect extends LitElement {
    try {
      saveTokens(null);
      location.reload();
-    } catch (err) {
+    } catch (err: any) {
      alert("Unable to log out!");
    }
  }

-  static get styles(): CSSResult {
+  static get styles(): CSSResultGroup {
    return css`
      .card-content a {
        color: var(--primary-color);
@@ -316,7 +308,7 @@ export class HcConnect extends LitElement {
        color: darkred;
      }

-      mwc-button ha-icon {
+      mwc-button ha-svg-icon {
        margin-left: 8px;
      }

@@ -4,15 +4,8 @@ import {
  getUser,
  HassUser,
 } from "home-assistant-js-websocket";
-import {
-  css,
-  CSSResult,
-  customElement,
-  html,
-  LitElement,
-  property,
-  TemplateResult,
-} from "lit-element";
+import { css, CSSResultGroup, html, LitElement, TemplateResult } from "lit";
+import { customElement, property } from "lit/decorators";
 import "../../../../src/components/ha-card";

@customElement("hc-layout")
@@ -30,7 +23,7 @@ class HcLayout extends LitElement {
      <ha-card>
        <div class="layout">
          <img class="hero" src="/images/google-nest-hub.png" />
-          <div class="card-header">
+          <h1 class="card-header">
            Home Assistant Cast${this.subtitle ? ` – ${this.subtitle}` : ""}
            ${this.auth
              ? html`
@@ -44,7 +37,7 @@ class HcLayout extends LitElement {
                  </div>
                `
              : ""}
-          </div>
+          </h1>
          <slot></slot>
        </div>
      </ha-card>
@@ -69,7 +62,7 @@ class HcLayout extends LitElement {
    }
  }

-  static get styles(): CSSResult {
+  static get styles(): CSSResultGroup {
    return css`
      :host {
        display: flex;
@@ -98,8 +91,12 @@ class HcLayout extends LitElement {
        line-height: 32px;
        padding: 24px 16px 16px;
        display: block;
+        margin: 0;
      }

+      .hero {
+        border-radius: 4px 4px 0 0;
+      }
      .subtitle {
        font-size: 14px;
        color: var(--secondary-text-color);
@@ -0,0 +1,22 @@
+const castContext = cast.framework.CastReceiverContext.getInstance();
+
+const playerManager = castContext.getPlayerManager();
+
+playerManager.setMessageInterceptor(
+  cast.framework.messages.MessageType.LOAD,
+  (loadRequestData) => {
+    const media = loadRequestData.media;
+    // Special handling if it came from Google Assistant
+    if (media.entity) {
+      media.contentId = media.entity;
+      media.streamType = cast.framework.messages.StreamType.LIVE;
+      media.contentType = "application/vnd.apple.mpegurl";
+      // @ts-ignore
+      media.hlsVideoSegmentFormat =
+        cast.framework.messages.HlsVideoSegmentFormat.FMP4;
+    }
+    return loadRequestData;
+  }
+);
+
+castContext.start();
@@ -5,8 +5,8 @@ import {
 import { castContext } from "../cast_context";

 export const castDemoLovelace: () => LovelaceConfig = () => {
-  const touchSupported = castContext.getDeviceCapabilities()
-    .touch_input_supported;
+  const touchSupported =
+    castContext.getDeviceCapabilities().touch_input_supported;
  return {
    views: [
      {
@@ -6,37 +6,151 @@ import { castContext } from "./cast_context";
 import { HcMain } from "./layout/hc-main";
 import { ReceivedMessage } from "./types";

-const controller = new HcMain();
-document.body.append(controller);
+const lovelaceController = new HcMain();
+document.body.append(lovelaceController);
+lovelaceController.addEventListener("cast-view-changed", (ev) => {
+  playDummyMedia(ev.detail.title);
+});
+
+const mediaPlayer = document.createElement("cast-media-player");
+mediaPlayer.style.display = "none";
+document.body.append(mediaPlayer);
+const playerStylesAdded = false;
+
+let controls: HTMLElement | null;
+
+const setTouchControlsVisibility = (visible: boolean) => {
+  if (!castContext.getDeviceCapabilities().touch_input_supported) {
+    return;
+  }
+  controls =
+    controls ||
+    (document.body.querySelector("touch-controls") as HTMLElement | null);
+  if (controls) {
+    controls.style.display = visible ? "initial" : "none";
+  }
+};
+
+let timeOut: number | undefined;
+
+const playDummyMedia = (viewTitle?: string) => {
+  const loadRequestData = new cast.framework.messages.LoadRequestData();
+  loadRequestData.autoplay = true;
+  loadRequestData.media = new cast.framework.messages.MediaInformation();
+  loadRequestData.media.contentId =
+    "https://cast.home-assistant.io/images/google-nest-hub.png";
+  loadRequestData.media.contentType = "image/jpeg";
+  loadRequestData.media.streamType = cast.framework.messages.StreamType.NONE;
+  const metadata = new cast.framework.messages.GenericMediaMetadata();
+  metadata.title = viewTitle;
+  loadRequestData.media.metadata = metadata;
+
+  loadRequestData.requestId = 0;
+  playerManager.load(loadRequestData);
+  if (timeOut) {
+    clearTimeout(timeOut);
+    timeOut = undefined;
+  }
+  if (castContext.getDeviceCapabilities().touch_input_supported) {
+    timeOut = window.setTimeout(() => playDummyMedia(viewTitle), 540000); // repeat every 9 minutes to keep it active (gets deactivated after 10 minutes)
+  }
+};
+
+const showLovelaceController = () => {
+  mediaPlayer.style.display = "none";
+  lovelaceController.style.display = "initial";
+  document.body.setAttribute("style", "overflow-y: auto !important");
+  setTouchControlsVisibility(false);
+};
+
+const showMediaPlayer = () => {
+  lovelaceController.style.display = "none";
+  mediaPlayer.style.display = "initial";
+  document.body.removeAttribute("style");
+  setTouchControlsVisibility(true);
+  if (!playerStylesAdded) {
+    const style = document.createElement("style");
+    style.innerHTML = `
+    body {
+      --logo-image: url('https://www.home-assistant.io/images/home-assistant-logo.svg');
+      --logo-repeat: no-repeat;
+      --playback-logo-image: url('https://www.home-assistant.io/images/home-assistant-logo.svg');
+      --theme-hue: 200;
+      --progress-color: #03a9f4;
+      --splash-image: url('https://home-assistant.io/images/cast/splash.png');
+      --splash-size: cover;
+      --background-color: #41bdf5;
+    }
+    `;
+    document.head.appendChild(style);
+  }
+};

 const options = new cast.framework.CastReceiverOptions();
 options.disableIdleTimeout = true;
 options.customNamespaces = {
-  // @ts-ignore
  [CAST_NS]: cast.framework.system.MessageType.JSON,
 };

-// The docs say we need to set options.touchScreenOptimizeApp = true
-// https://developers.google.com/cast/docs/caf_receiver/customize_ui#accessing_ui_controls
-// This doesn't work.
-// @ts-ignore
-options.touchScreenOptimizedApp = true;
-
-// The class reference say we can set a uiConfig in options to set it
-// https://developers.google.com/cast/docs/reference/caf_receiver/cast.framework.CastReceiverOptions#uiConfig
-// This doesn't work either.
-// @ts-ignore
-options.uiConfig = new cast.framework.ui.UiConfig();
-// @ts-ignore
-options.uiConfig.touchScreenOptimizedApp = true;
-
 castContext.addCustomMessageListener(
  CAST_NS,
  // @ts-ignore
  (ev: ReceivedMessage<HassMessage>) => {
+    // We received a show Lovelace command, stop media from playing, hide media player and show Lovelace controller
+    if (
+      playerManager.getPlayerState() !==
+      cast.framework.messages.PlayerState.IDLE
+    ) {
+      playerManager.stop();
+    } else {
+      showLovelaceController();
+    }
    const msg = ev.data;
    msg.senderId = ev.senderId;
-    controller.processIncomingMessage(msg);
+    lovelaceController.processIncomingMessage(msg);
+  }
+);
+
+const playerManager = castContext.getPlayerManager();
+
+playerManager.setMessageInterceptor(
+  cast.framework.messages.MessageType.LOAD,
+  (loadRequestData) => {
+    if (
+      loadRequestData.media.contentId ===
+      "https://cast.home-assistant.io/images/google-nest-hub.png"
+    ) {
+      return loadRequestData;
+    }
+    // We received a play media command, hide Lovelace and show media player
+    showMediaPlayer();
+    const media = loadRequestData.media;
+    // Special handling if it came from Google Assistant
+    if (media.entity) {
+      media.contentId = media.entity;
+      media.streamType = cast.framework.messages.StreamType.LIVE;
+      media.contentType = "application/vnd.apple.mpegurl";
+      // @ts-ignore
+      media.hlsVideoSegmentFormat =
+        cast.framework.messages.HlsVideoSegmentFormat.FMP4;
+    }
+    return loadRequestData;
+  }
+);
+
+playerManager.addEventListener(
+  cast.framework.events.EventType.MEDIA_STATUS,
+  (event) => {
+    if (
+      event.mediaStatus?.playerState ===
+        cast.framework.messages.PlayerState.IDLE &&
+      event.mediaStatus?.idleReason &&
+      event.mediaStatus?.idleReason !==
+        cast.framework.messages.IdleReason.INTERRUPTED
+    ) {
+      // media finished or stopped, return to default Lovelace
+      showLovelaceController();
+    }
  }
 );

@@ -1,4 +1,5 @@
-import { customElement, html, property, TemplateResult } from "lit-element";
+import { html, TemplateResult } from "lit";
+import { customElement, property, state } from "lit/decorators";
 import { mockHistory } from "../../../../demo/src/stubs/history";
 import { LovelaceConfig } from "../../../../src/data/lovelace";
 import {
@@ -13,9 +14,9 @@ import "./hc-lovelace";

@customElement("hc-demo")
 class HcDemo extends HassElement {
-  @property() public lovelacePath!: string;
+  @property({ attribute: false }) public lovelacePath!: string;

-  @property() private _lovelaceConfig?: LovelaceConfig;
+  @state() private _lovelaceConfig?: LovelaceConfig;

  protected render(): TemplateResult {
    if (!this._lovelaceConfig) {
@@ -32,10 +33,10 @@ class HcDemo extends HassElement {

  protected firstUpdated(changedProps) {
    super.firstUpdated(changedProps);
-    this._initialize();
+    this._initializeHass();
  }

-  private async _initialize() {
+  private async _initializeHass() {
    const initial: Partial<MockHomeAssistant> = {
      // Override updateHass so that the correct hass lifecycle methods are called
      updateHass: (hassUpdate: Partial<HomeAssistant>) =>
@@ -1,17 +1,10 @@
-import {
-  css,
-  CSSResult,
-  customElement,
-  html,
-  LitElement,
-  property,
-  TemplateResult,
-} from "lit-element";
+import { css, CSSResultGroup, html, LitElement, TemplateResult } from "lit";
+import { customElement, property } from "lit/decorators";
 import { HomeAssistant } from "../../../../src/types";

@customElement("hc-launch-screen")
 class HcLaunchScreen extends LitElement {
-  @property() public hass?: HomeAssistant;
+  @property({ attribute: false }) public hass?: HomeAssistant;

  @property() public error?: string;

@@ -29,7 +22,7 @@ class HcLaunchScreen extends LitElement {
    `;
  }

-  static get styles(): CSSResult {
+  static get styles(): CSSResultGroup {
    return css`
      :host {
        display: block;
@@ -1,27 +1,22 @@
-import {
-  css,
-  CSSResult,
-  customElement,
-  html,
-  LitElement,
-  property,
-  TemplateResult,
-} from "lit-element";
+import { css, CSSResultGroup, html, LitElement, TemplateResult } from "lit";
+import { customElement, property } from "lit/decorators";
+import { fireEvent } from "../../../../src/common/dom/fire_event";
 import { LovelaceConfig } from "../../../../src/data/lovelace";
 import { Lovelace } from "../../../../src/panels/lovelace/types";
-import "../../../../src/panels/lovelace/views/hui-panel-view";
 import "../../../../src/panels/lovelace/views/hui-view";
 import { HomeAssistant } from "../../../../src/types";
 import "./hc-launch-screen";

@customElement("hc-lovelace")
 class HcLovelace extends LitElement {
-  @property() public hass!: HomeAssistant;
+  @property({ attribute: false }) public hass!: HomeAssistant;

-  @property() public lovelaceConfig!: LovelaceConfig;
+  @property({ attribute: false }) public lovelaceConfig!: LovelaceConfig;

  @property() public viewPath?: string | number;

+  @property() public urlPath: string | null = null;
+
  protected render(): TemplateResult {
    const index = this._viewIndex;
    if (index === undefined) {
@@ -34,30 +29,23 @@ class HcLovelace extends LitElement {
    }
    const lovelace: Lovelace = {
      config: this.lovelaceConfig,
+      rawConfig: this.lovelaceConfig,
      editMode: false,
+      urlPath: this.urlPath,
      enableFullEditMode: () => undefined,
      mode: "storage",
-      language: "en",
+      locale: this.hass.locale,
      saveConfig: async () => undefined,
      deleteConfig: async () => undefined,
      setEditMode: () => undefined,
    };
-    return this.lovelaceConfig.views[index].panel
-      ? html`
-          <hui-panel-view
-            .hass=${this.hass}
-            .lovelace=${lovelace}
-            .config=${this.lovelaceConfig.views[index]}
-          ></hui-panel-view>
-        `
-      : html`
-          <hui-view
-            .hass=${this.hass}
-            .lovelace=${lovelace}
-            .index=${index}
-            columns="2"
-          ></hui-view>
-        `;
+    return html`
+      <hui-view
+        .hass=${this.hass}
+        .lovelace=${lovelace}
+        .index=${index}
+      ></hui-view>
+    `;
  }

  protected updated(changedProps) {
@@ -67,13 +55,28 @@ class HcLovelace extends LitElement {
      const index = this._viewIndex;

      if (index !== undefined) {
+        const dashboardTitle = this.lovelaceConfig.title || this.urlPath;
+
+        const viewTitle =
+          this.lovelaceConfig.views[index].title ||
+          this.lovelaceConfig.views[index].path;
+
+        fireEvent(this, "cast-view-changed", {
+          title:
+            dashboardTitle || viewTitle
+              ? `${dashboardTitle || ""}${
+                  dashboardTitle && viewTitle ? ": " : ""
+                }${viewTitle || ""}`
+              : undefined,
+        });
+
        const configBackground =
          this.lovelaceConfig.views[index].background ||
          this.lovelaceConfig.background;

        if (configBackground) {
          (this.shadowRoot!.querySelector(
-            "hui-view, hui-panel-view"
+            "hui-view"
          ) as HTMLElement)!.style.setProperty(
            "--lovelace-background",
            configBackground
@@ -97,10 +100,11 @@ class HcLovelace extends LitElement {
    return undefined;
  }

-  static get styles(): CSSResult {
+  static get styles(): CSSResultGroup {
    return css`
      :host {
        min-height: 100vh;
+        height: 0;
        display: flex;
        flex-direction: column;
        box-sizing: border-box;
@@ -113,8 +117,15 @@ class HcLovelace extends LitElement {
  }
 }

+export interface CastViewChanged {
+  title: string | undefined;
+}
+
 declare global {
  interface HTMLElementTagNameMap {
    "hc-lovelace": HcLovelace;
  }
+  interface HASSDomEvents {
+    "cast-view-changed": CastViewChanged;
+  }
 }
@@ -3,7 +3,8 @@ import {
  getAuth,
  UnsubscribeFunc,
 } from "home-assistant-js-websocket";
-import { customElement, html, property, TemplateResult } from "lit-element";
+import { html, TemplateResult } from "lit";
+import { customElement, state } from "lit/decorators";
 import { CAST_NS } from "../../../../src/cast/const";
 import {
  ConnectMessage,
@@ -12,7 +13,11 @@ import {
  ShowDemoMessage,
  ShowLovelaceViewMessage,
 } from "../../../../src/cast/receiver_messages";
-import { ReceiverStatusMessage } from "../../../../src/cast/sender_messages";
+import {
+  ReceiverErrorCode,
+  ReceiverErrorMessage,
+  ReceiverStatusMessage,
+} from "../../../../src/cast/sender_messages";
 import { atLeastVersion } from "../../../../src/common/config/version";
 import { isNavigationClick } from "../../../../src/common/dom/is-navigation-click";
 import {
@@ -31,18 +36,18 @@ let resourcesLoaded = false;

@customElement("hc-main")
 export class HcMain extends HassElement {
-  @property() private _showDemo = false;
+  @state() private _showDemo = false;

-  @property() private _lovelaceConfig?: LovelaceConfig;
+  @state() private _lovelaceConfig?: LovelaceConfig;

-  @property() private _lovelacePath: string | number | null = null;
+  @state() private _lovelacePath: string | number | null = null;

-  @property() private _error?: string;
+  @state() private _error?: string;
+
+  @state() private _urlPath?: string | null;

  private _unsubLovelace?: UnsubscribeFunc;

-  private _urlPath?: string | null;
-
  public processIncomingMessage(msg: HassMessage) {
    if (msg.type === "connect") {
      this._handleConnectMessage(msg);
@@ -67,8 +72,10 @@ export class HcMain extends HassElement {
      !this._lovelaceConfig ||
      this._lovelacePath === null ||
      // Guard against part of HA not being loaded yet.
-      (this.hass &&
-        (!this.hass.states || !this.hass.config || !this.hass.services))
+      !this.hass ||
+      !this.hass.states ||
+      !this.hass.config ||
+      !this.hass.services
    ) {
      return html`
        <hc-launch-screen
@@ -82,6 +89,8 @@ export class HcMain extends HassElement {
        .hass=${this.hass}
        .lovelaceConfig=${this._lovelaceConfig}
        .viewPath=${this._lovelacePath}
+        .urlPath=${this._urlPath}
+        @config-refresh=${this._generateLovelaceConfig}
      ></hc-lovelace>
    `;
  }
@@ -104,6 +113,7 @@ export class HcMain extends HassElement {
        this._sendStatus();
      }
    });
+    this.addEventListener("dialog-closed", this._dialogClosed);
  }

  private _sendStatus(senderId?: string) {
@@ -115,7 +125,7 @@ export class HcMain extends HassElement {

    if (this.hass) {
      status.hassUrl = this.hass.auth.data.hassUrl;
-      status.lovelacePath = this._lovelacePath!;
+      status.lovelacePath = this._lovelacePath;
      status.urlPath = this._urlPath;
    }

@@ -128,6 +138,30 @@ export class HcMain extends HassElement {
    }
  }

+  private _sendError(
+    error_code: number,
+    error_message: string,
+    senderId?: string
+  ) {
+    const error: ReceiverErrorMessage = {
+      type: "receiver_error",
+      error_code,
+      error_message,
+    };
+
+    if (senderId) {
+      this.sendMessage(senderId, error);
+    } else {
+      for (const sender of castContext.getSenders()) {
+        this.sendMessage(sender.id, error);
+      }
+    }
+  }
+
+  private _dialogClosed = () => {
+    document.body.setAttribute("style", "overflow-y: auto !important");
+  };
+
  private async _handleGetStatusMessage(msg: GetStatusMessage) {
    this._sendStatus(msg.senderId!);
  }
@@ -145,15 +179,19 @@ export class HcMain extends HassElement {
          expires_in: 0,
        }),
      });
-    } catch (err) {
-      this._error = this._getErrorMessage(err);
+    } catch (err: any) {
+      const errorMessage = this._getErrorMessage(err);
+      this._error = errorMessage;
+      this._sendError(err, errorMessage);
      return;
    }
    let connection;
    try {
      connection = await createConnection({ auth });
-    } catch (err) {
-      this._error = this._getErrorMessage(err);
+    } catch (err: any) {
+      const errorMessage = this._getErrorMessage(err);
+      this._error = errorMessage;
+      this._sendError(err, errorMessage);
      return;
    }
    if (this.hass) {
@@ -165,24 +203,29 @@ export class HcMain extends HassElement {
  }

  private async _handleShowLovelaceMessage(msg: ShowLovelaceViewMessage) {
+    this._showDemo = false;
    // We should not get this command before we are connected.
    // Means a client got out of sync. Let's send status to them.
    if (!this.hass) {
      this._sendStatus(msg.senderId!);
      this._error = "Cannot show Lovelace because we're not connected.";
+      this._sendError(ReceiverErrorCode.NOT_CONNECTED, this._error);
      return;
    }
+    this._error = undefined;
    if (msg.urlPath === "lovelace") {
      msg.urlPath = null;
    }
+    this._lovelacePath = msg.viewPath;
    if (!this._unsubLovelace || this._urlPath !== msg.urlPath) {
      this._urlPath = msg.urlPath;
+      this._lovelaceConfig = undefined;
      if (this._unsubLovelace) {
        this._unsubLovelace();
      }
      const llColl = atLeastVersion(this.hass.connection.haVersion, 0, 107)
-        ? getLovelaceCollection(this.hass!.connection, msg.urlPath)
-        : getLegacyLovelaceCollection(this.hass!.connection);
+        ? getLovelaceCollection(this.hass.connection, msg.urlPath)
+        : getLegacyLovelaceCollection(this.hass.connection);
      // We first do a single refresh because we need to check if there is LL
      // configuration.
      try {
@@ -190,15 +233,20 @@ export class HcMain extends HassElement {
        this._unsubLovelace = llColl.subscribe((lovelaceConfig) =>
          this._handleNewLovelaceConfig(lovelaceConfig)
        );
-      } catch (err) {
+      } catch (err: any) {
+        if (
+          atLeastVersion(this.hass.connection.haVersion, 0, 107) &&
+          err.code !== "config_not_found"
+        ) {
+          // eslint-disable-next-line
+          console.log("Error fetching Lovelace configuration", err, msg);
+          this._error = `Error fetching Lovelace configuration: ${err.message}`;
+          this._sendError(ReceiverErrorCode.FETCH_CONFIG_FAILED, this._error);
+          return;
+        }
        // Generate a Lovelace config.
        this._unsubLovelace = () => undefined;
-        const { generateLovelaceConfigFromHass } = await import(
-          "../../../../src/panels/lovelace/common/generate-lovelace-config"
-        );
-        this._handleNewLovelaceConfig(
-          await generateLovelaceConfigFromHass(this.hass!)
-        );
+        await this._generateLovelaceConfig();
      }
    }
    if (!resourcesLoaded) {
@@ -210,16 +258,27 @@ export class HcMain extends HassElement {
        loadLovelaceResources(resources, this.hass!.auth.data.hassUrl);
      }
    }
-    this._showDemo = false;
-    this._lovelacePath = msg.viewPath;
-    if (castContext.getDeviceCapabilities().touch_input_supported) {
-      this._breakFree();
-    }
+
    this._sendStatus();
  }

+  private async _generateLovelaceConfig() {
+    const { generateLovelaceDashboardStrategy } = await import(
+      "../../../../src/panels/lovelace/strategies/get-strategy"
+    );
+    this._handleNewLovelaceConfig(
+      await generateLovelaceDashboardStrategy(
+        {
+          hass: this.hass!,
+          narrow: false,
+        },
+        "original-states"
+      )
+    );
+  }
+
  private _handleNewLovelaceConfig(lovelaceConfig: LovelaceConfig) {
-    castContext.setApplicationState(lovelaceConfig.title!);
+    castContext.setApplicationState(lovelaceConfig.title || "");
    this._lovelaceConfig = lovelaceConfig;
  }

@@ -228,9 +287,6 @@ export class HcMain extends HassElement {
      this._showDemo = true;
      this._lovelacePath = "overview";
      this._sendStatus();
-      if (castContext.getDeviceCapabilities().touch_input_supported) {
-        this._breakFree();
-      }
    });
  }

@@ -251,14 +307,6 @@ export class HcMain extends HassElement {
    }
  }

-  private _breakFree() {
-    const controls = document.body.querySelector("touch-controls");
-    if (controls) {
-      controls.remove();
-    }
-    document.body.setAttribute("style", "overflow-y: auto !important");
-  }
-
  private sendMessage(senderId: string, response: any) {
    castContext.sendCustomMessage(CAST_NS, senderId, response);
  }
@@ -1,3 +1,4 @@
 import "web-animations-js/web-animations-next-lite.min";
+import "../../../src/resources/ha-style";
 import "../../../src/resources/roboto";
 import "./layout/hc-lovelace";
@@ -1,11 +1,8 @@
 const { createCastConfig } = require("../build-scripts/webpack.js");
-const { isProdBuild } = require("../build-scripts/env.js");
-
-// File just used for stats builds
-
-const latestBuild = true;
+const { isProdBuild, isStatsBuild } = require("../build-scripts/env.js");

 module.exports = createCastConfig({
  isProdBuild: isProdBuild(),
-  latestBuild,
+  isStatsBuild: isStatsBuild(),
+  latestBuild: true,
 });
--- a/Show More
+++ b/Show More
@@ -1 +1 @@
 .1