Drop Custom Elements ES5 adapter (#6107)

build-scripts/gulp/gather-static.js

@@ -36,11 +36,13 @@ 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/")

cast/src/html/launcher-faq.html.template

@@ -45,7 +45,6 @@
       (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");
           <% if (useRollup) { %>
             _ls("/static/js/s.min.js").onload = function() {
               System.import("<%= es5LauncherJS %>");

cast/src/html/launcher.html.template

@@ -36,7 +36,6 @@
       (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");
           <% if (useRollup) { %>
             _ls("/static/js/s.min.js").onload = function() {
               System.import("<%= es5LauncherJS %>");

demo/src/html/index.html.template

@@ -92,7 +92,6 @@
       (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");
           <% if (useRollup) { %>
             _ls("/static/js/s.min.js").onload = function() {
               System.import("<%= es5DemoJS %>");

hassio/src/entrypoint.ts

@@ -1,11 +1,6 @@
 import "../../src/resources/compatibility";
-
+import "../../src/resources/roboto";
-window.loadES5Adapter().then(() => {
+import "./hassio-main";
-  // eslint-disable-next-line
-  import(/* webpackChunkName: "roboto" */ "../../src/resources/roboto");
-  // eslint-disable-next-line
-  import(/* webpackChunkName: "hassio-main" */ "./hassio-main");
-});
 
 const styleEl = document.createElement("style");
 styleEl.innerHTML = `

src/html/authorize.html.template

@@ -47,7 +47,6 @@
       (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");
           <% if (useRollup) { %>
             _ls("/static/js/s.min.js").onload = function() {
               System.import("<%= es5PageJS %>");

src/html/index.html.template

@@ -66,7 +66,6 @@
       (function() {
         if (!window.latestJS) {
           window.customPanelJS = "<%= es5CustomPanelJS %>";
-          _ls("/static/polyfills/custom-elements-es5-adapter.js");
 
           <% if (useRollup) { %>
             _ls("/static/js/s.min.js").onload = function() {

src/html/onboarding.html.template

@@ -49,7 +49,6 @@
       (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");
           <% if (useRollup) { %>
             _ls("/static/js/s.min.js").onload = function() {
               System.import("<%= es5PageJS %>");