remove react dom legacy

Author: feedthejim

packages/next/src/build/noop-react-dom-server-legacy.ts

@@ -0,0 +1,10 @@
+const ERROR_MESSAGE =
+  'Internal Error: do not use legacy react-dom/server APIs. If you encountered this error, please open an issue on the Next.js repo.'
+
+export function renderToString() {
+  throw new Error(ERROR_MESSAGE)
+}
+
+export function renderToStaticMarkup() {
+  throw new Error(ERROR_MESSAGE)
+}

packages/next/src/build/webpack-config.ts

@@ -222,7 +222,6 @@ function createRSCAliases(
         'react/jsx-dev-runtime$': `next/dist/server/future/route-modules/app-page/vendored/shared/react-jsx-dev-runtime`,
         react$: `next/dist/server/future/route-modules/app-page/vendored/${opts.layer}/react`,
         'react-dom$': `next/dist/server/future/route-modules/app-page/vendored/${opts.layer}/react-dom`,
-        'react-dom/server.edge$': `next/dist/server/future/route-modules/app-page/vendored/${opts.layer}/react-dom-server-edge`,
         'react-server-dom-webpack/client.edge$': `next/dist/server/future/route-modules/app-page/vendored/${opts.layer}/react-server-dom-webpack-client-edge`,
       })
     } else if (opts.layer === WEBPACK_LAYERS.reactServerComponents) {

packages/next/webpack.config.js

@@ -21,7 +21,7 @@ const pagesExternals = [
 ]
 
 function makeAppAliases(reactChannel = '') {
-  const alias = {
+  return {
     react$: `next/dist/compiled/react${reactChannel}`,
     'react/shared-subset$': `next/dist/compiled/react${reactChannel}/react.shared-subset`,
     'react-dom/server-rendering-stub$': `next/dist/compiled/react-dom${reactChannel}/server-rendering-stub`,
@@ -36,9 +36,10 @@ function makeAppAliases(reactChannel = '') {
     'react-server-dom-webpack/client.edge$': `next/dist/compiled/react-server-dom-webpack${reactChannel}/client.edge`,
     'react-server-dom-webpack/server.edge$': `next/dist/compiled/react-server-dom-webpack${reactChannel}/server.edge`,
     'react-server-dom-webpack/server.node$': `next/dist/compiled/react-server-dom-webpack${reactChannel}/server.node`,
+    // optimisations to ignore the legacy build of react-dom/server
+    './cjs/react-dom-server-legacy.browser.production.min.js': `next/dist/build/noop-react-dom-server-legacy`,
+    './cjs/react-dom-server-legacy.browser.development.js': `next/dist/build/noop-react-dom-server-legacy`,
   }
-
-  return alias
 }
 
 const appAliases = makeAppAliases()