fix: @vite/client http request is 404 not found (vitejs#4187)

Co-authored-by: Shinigami <chrissi92@hotmail.de>

packages/playground/extensions/__tests__/extensions.spec.ts

@@ -0,0 +1,10 @@
+test('should have no 404s', () => {
+  browserLogs.forEach((msg) => {
+    expect(msg).not.toMatch('404')
+  })
+})
+
+test('not contain `.mjs`', async () => {
+  let appHtml = await page.content()
+  expect(appHtml).toMatch('Hello Vite!')
+})

packages/playground/extensions/index.html

@@ -0,0 +1,6 @@
+<div id="app">Hello Vite!</div>
+
+<script type="module">
+  import { createApp } from 'vue'
+  createApp({ template: 'Hello Vite!' }).mount('#app')
+</script>

packages/playground/extensions/package.json

@@ -0,0 +1,14 @@
+{
+  "name": "test-extensions",
+  "private": true,
+  "version": "0.0.0",
+  "scripts": {
+    "dev": "vite",
+    "build": "vite build",
+    "debug": "node --inspect-brk ../../vite/bin/vite",
+    "serve": "vite preview"
+  },
+  "dependencies": {
+    "vue": "^3.0.8"
+  }
+}

packages/playground/extensions/vite.config.js

@@ -0,0 +1,6 @@
+module.exports = {
+  resolve: {
+    alias: [{ find: 'vue', replacement: 'vue/dist/vue.esm-bundler.js' }],
+    extensions: ['.js']
+  }
+}

packages/vite/src/client/client.ts

@@ -8,7 +8,8 @@ import {
 } from 'types/hmrPayload'
 import { CustomEventName } from 'types/customEvent'
 import { ErrorOverlay, overlayId } from './overlay'
-import './env'
+// eslint-disable-next-line node/no-missing-import
+import '@vite/env'
 
 // injected by the hmr plugin when served
 declare const __ROOT__: string

packages/vite/src/node/config.ts

@@ -21,7 +21,12 @@ import { ESBuildOptions } from './plugins/esbuild'
 import dotenv from 'dotenv'
 import dotenvExpand from 'dotenv-expand'
 import { Alias, AliasOptions } from 'types/alias'
-import { CLIENT_DIR, DEFAULT_ASSETS_RE } from './constants'
+import {
+  CLIENT_PUBLIC_PATH,
+  CLIENT_ENTRY,
+  ENV_ENTRY,
+  DEFAULT_ASSETS_RE
+} from './constants'
 import {
   InternalResolveOptions,
   ResolveOptions,
@@ -295,13 +300,16 @@ export async function resolveConfig(
     config.root ? path.resolve(config.root) : process.cwd()
   )
 
+  const clientAlias = [
+    { find: /^[\/]?@vite\/env/, replacement: () => ENV_ENTRY },
+    { find: CLIENT_PUBLIC_PATH, replacement: () => CLIENT_ENTRY }
+  ]
+
   // resolve alias with internal client alias
   const resolvedAlias = mergeAlias(
-    // #1732 the CLIENT_DIR may contain $$ which cannot be used as direct
-    // replacement string.
     // @ts-ignore because @rollup/plugin-alias' type doesn't allow function
     // replacement, but its implementation does work with function values.
-    [{ find: /^\/@vite\//, replacement: () => CLIENT_DIR + '/' }],
+    clientAlias,
     config.resolve?.alias || config.alias || []
   )