Change how Preact's render/hydrate functions are re-export via th…

…e `preact/dom` namespace to match changes in upstream

build-system/common/update-packages.js

@@ -179,14 +179,6 @@ function patchShadowDom() {
 
   writeIfUpdated(patchedName, file);
 }
-/**
- * Adds a missing export statement to the preact module.
- */
-function patchPreact() {
-  fs.ensureDirSync('node_modules/preact/dom');
-  const file = `export { render, hydrate } from 'preact';`;
-  writeIfUpdated('node_modules/preact/dom/index.js', file);
-}
 
 /**
  * Deletes the map file for rrule, which breaks closure compiler.
@@ -235,7 +227,6 @@ function updatePackages() {
   patchIntersectionObserver();
   patchResizeObserver();
   patchShadowDom();
-  patchPreact();
   removeRruleSourcemap();
   if (isCiBuild()) {
     runNpmChecks();

src/preact/preact-dom.ts

@@ -0,0 +1,12 @@
+/**
+ * Re-export render/hydrate from 'preact' as 'preact/dom' (see ./tsconfig.json)
+ * in order to make it more consistent with React. This makes remapping the
+ * imports for React builds simple (preact/dom --> react-dom).
+ *
+ * @fileoverview
+ */
+
+export {hydrate, render} from 'preact';
+
+// eslint-disable-next-line no-restricted-syntax
+declare module 'preact/dom' {}

src/preact/tsconfig.json

@@ -6,5 +6,10 @@
     "**/*.d.ts",
     "../core/**/globals.d.ts",
     "../**/base-element.d.ts"
-  ]
+  ],
+  "compilerOptions": {
+    "paths": {
+      "preact/dom": ["./preact-dom.ts"]
+    }
+  }
 }