Move compatibility to static polyfill handling (#24775)

* Move compatibility to static polyfill handling

* Move compatibility to static polyfill handling

* Prettier

build-scripts/bundle.cjs

@@ -18,7 +18,7 @@ module.exports.sourceMapURL = () => {
 module.exports.ignorePackages = () => [];
 
 // Files from NPM packages that we should replace with empty file
-module.exports.emptyPackages = ({ latestBuild, isHassioBuild }) =>
+module.exports.emptyPackages = ({ isHassioBuild }) =>
   [
     // Contains all color definitions for all material color sets.
     // We don't use it
@@ -28,12 +28,6 @@ module.exports.emptyPackages = ({ latestBuild, isHassioBuild }) =>
     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")
-      ),
     // Icons in supervisor conflict with icons in HA so we don't load.
     isHassioBuild &&
       require.resolve(

build-scripts/gulp/gather-static.js

@@ -59,6 +59,11 @@ function copyPolyfills(staticDir) {
     npmPath("@webcomponents/webcomponentsjs/webcomponents-bundle.js.map"),
     staticPath("polyfills/")
   );
+  // Lit polyfill support
+  fs.copySync(
+    npmPath("lit/polyfill-support.js"),
+    path.join(staticPath("polyfills/"), "lit-polyfill-support.js")
+  );
 
   // dialog-polyfill css
   copyFileDir(

build-scripts/rspack.cjs

@@ -155,9 +155,7 @@ const createRspackConfig = ({
         },
       }),
       new rspack.NormalModuleReplacementPlugin(
-        new RegExp(
-          bundle.emptyPackages({ latestBuild, isHassioBuild }).join("|")
-        ),
+        new RegExp(bundle.emptyPackages({ isHassioBuild }).join("|")),
         path.resolve(paths.polymer_dir, "src/util/empty.js")
       ),
       !isProdBuild && new LogStartCompilePlugin(),