home-assistant.io/source/developers/frontend_creating_custom_ui.markdown
c727 37a7104d7d fix example for custom state cards (#3592)
* change to state-card-my-custom-light

* .html
2017-10-12 17:25:09 +02:00

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---
layout: page
title: "Creating custom UI"
description: "Introduction to create custom ui for Home Assistant."
date: 2017-02-04 13:00
sidebar: true
comments: false
sharing: true
footer: true
ha_release: 0.38
---
If you would like to use your own [State card](/developers/frontend_add_card/) without merging your code into [home-assistant-polymer](https://github.com/home-assistant/home-assistant-polymer/) you can create your own implementation.
Put the element source file and its dependencies in `www/custom_ui/` directory under your Home Assistant [configuration](/docs/configuration/) directory.
For example if creating a state card for the `light` domain named `state-card-my-custom-light` put `state-card-my-custom-light.html` in `www/custom_ui/`.
That file should implement `<state-card-my-custom-light>` tag with Polymer.
In `state-card-my-custom-light.html` you should use `<link rel="import">` to import all the dependencies **not** used by Home Assistant's UI.
Do not import any dependencies used by the Home Assistant UI.
Importing those will work in `development: 1` mode, but will fail in production mode.
1) In the `customize:` section of the `configuration.yaml` file put `custom_ui_state_card: state-card-my-custom-light`.
2) In the `frontend` section use `extra_html_url` to specify the URL to load.
For example:
```yaml
homeassistant:
customize:
light.bedroom:
custom_ui_state_card: state-card-my-custom-light
frontend:
extra_html_url:
- /local/custom_ui/state-card-my-custom-light.html
```
For more possibilities, see the [Custom UI section](/cookbook/#user-interface) on our Examples page.