fix: consider deep imports in isBuiltIn

packages/playground/ssr-vue/__tests__/ssr-vue.spec.ts

@@ -146,4 +146,9 @@ test('client navigation', async () => {
 test('import.meta.url', async () => {
   await page.goto(url)
   expect(await page.textContent('.protocol')).toEqual('file:')
-})
+})
+
+test('deep import built-in module', async () => {
+  await page.goto(url)
+  expect(await page.textContent('.file-message')).toMatch('fs/promises')
+})

packages/playground/ssr-vue/server.js

@@ -66,7 +66,7 @@ async function createServer(
         render = require('./dist/server/entry-server.js').render
       }
 
-      const [appHtml, preloadLinks] = await render(url, manifest)
+      const [appHtml, preloadLinks] = await render(url, manifest, __dirname)
 
       const html = template
         .replace(`<!--preload-links-->`, preloadLinks)

packages/playground/ssr-vue/src/entry-server.js

@@ -1,7 +1,8 @@
 import { createApp } from './main'
 import { renderToString } from 'vue/server-renderer'
+import path from 'path'
 
-export async function render(url, manifest) {
+export async function render(url, manifest, rootDir) {
   const { app, router } = createApp()
 
   // set the router to the desired URL before rendering
@@ -13,7 +14,15 @@ export async function render(url, manifest) {
   // itself on ctx.modules. After the render, ctx.modules would contain all the
   // components that have been instantiated during this render call.
   const ctx = {}
-  const html = await renderToString(app, ctx)
+  let html = await renderToString(app, ctx)
+
+  // for testing. Use deep import built-in module. PR #5248
+  const fs =
+    process.versions.node.split('.')[0] >= '14'
+      ? await import('fs/promises')
+      : (await import('fs')).promises
+  const msg = await fs.readFile(path.resolve(rootDir, './src/message'), 'utf-8')
+  html += `<p class="file-message">msg read via deep import built-in module: ${msg}</p>`
 
   // the SSR manifest generated by Vite contains module -> chunk/asset mapping
   // which we can then use to determine what files need to be preloaded for this

packages/playground/ssr-vue/src/message

@@ -0,0 +1 @@
+"fs/promises"

packages/vite/src/node/utils.ts

@@ -38,6 +38,8 @@ export const normalizeId = (id: string): string =>
   id.replace(/(\s*>\s*)/g, ' > ')
 
 export function isBuiltin(id: string): boolean {
+  const deepMatch = id.match(deepImportRE)
+  id = deepMatch ? deepMatch[1] || deepMatch[2] : id
   return builtins.includes(id)
 }