refactor: implement isExplicitImportRequired on client

packages/vite/src/client/client.ts

@@ -388,12 +388,7 @@ export function removeStyle(id: string): void {
   }
 }
 
-async function fetchUpdate({
-  path,
-  acceptedPath,
-  timestamp,
-  explicitImportRequired
-}: Update) {
+async function fetchUpdate({ path, acceptedPath, timestamp }: Update) {
   const mod = hotModulesMap.get(path)
   if (!mod) {
     // In a code-splitting project,
@@ -426,6 +421,7 @@ async function fetchUpdate({
     return deps.some((dep) => modulesToUpdate.has(dep))
   })
 
+  const needImportQuery = isExplicitImportRequired(path)
   await Promise.all(
     Array.from(modulesToUpdate).map(async (dep) => {
       const disposer = disposeMap.get(dep)
@@ -436,7 +432,7 @@ async function fetchUpdate({
           /* @vite-ignore */
           base +
             path.slice(1) +
-            `?${explicitImportRequired ? 'import&' : ''}t=${timestamp}${
+            `?${needImportQuery ? 'import&' : ''}t=${timestamp}${
               query ? `&${query}` : ''
             }`
         )
@@ -588,6 +584,35 @@ export function createHotContext(ownerPath: string): ViteHotContext {
   return hot
 }
 
+const cssLangs = `\\.(css|less|sass|scss|styl|stylus|pcss|postcss)($|\\?)`
+const cssLangRE = new RegExp(cssLangs)
+
+const isCSSRequest = (request: string): boolean => cssLangRE.test(request)
+
+const knownJsSrcRE = /\.((j|t)sx?|m[jt]s|vue|marko|svelte|astro)($|\?)/
+
+const pathExtname = (url: string) => {
+  const parts = url.split('/')
+  const lastPart = parts[parts.length - 1]
+  const dotPos = lastPart.lastIndexOf('.')
+  return dotPos === -1 ? '' : lastPart.slice(dotPos)
+}
+
+const isJSRequest = (url: string): boolean => {
+  url = cleanUrl(url)
+  if (knownJsSrcRE.test(url)) {
+    return true
+  }
+  if (!pathExtname(url) && !url.endsWith('/')) {
+    return true
+  }
+  return false
+}
+
+function isExplicitImportRequired(url: string) {
+  return !isJSRequest(cleanUrl(url)) && !isCSSRequest(url)
+}
+
 /**
  * urls here are dynamic import() urls that couldn't be statically analyzed
  */

packages/vite/src/node/server/hmr.ts

@@ -9,7 +9,6 @@ import { createDebugger, normalizePath, unique } from '../utils'
 import type { ViteDevServer } from '..'
 import { isCSSRequest } from '../plugins/css'
 import { getAffectedGlobModules } from '../plugins/importMetaGlob'
-import { isExplicitImportRequired } from '../plugins/importAnalysis'
 import type { ModuleNode } from './moduleGraph'
 
 export const debugHmr = createDebugger('vite:hmr')
@@ -157,10 +156,6 @@ export function updateModules(
         type: `${boundary.type}-update` as const,
         timestamp,
         path: boundary.url,
-        explicitImportRequired:
-          boundary.type === 'js'
-            ? isExplicitImportRequired(boundary.url)
-            : undefined,
         acceptedPath: acceptedVia.url
       }))
     )

packages/vite/types/hmrPayload.d.ts

@@ -20,7 +20,6 @@ export interface Update {
   path: string
   acceptedPath: string
   timestamp: number
-  explicitImportRequired: boolean | undefined
 }
 
 export interface PrunePayload {