fix: ?import with trailing = added by some servers (#3805)

Author: t3dotgg

packages/vite/src/node/plugins/importAnalysis.ts

@@ -222,7 +222,7 @@ export function importAnalysisPlugin(config: ResolvedConfig): Plugin {
           // for relative js/css imports, inherit importer's version query
           // do not do this for unknown type imports, otherwise the appended
           // query can break 3rd party plugin's extension checks.
-          if (isRelative && !/[\?&]import\b/.test(url)) {
+          if (isRelative && !/[\?&]import=?\b/.test(url)) {
             const versionMatch = importer.match(DEP_VERSION_RE)
             if (versionMatch) {
               url = injectQuery(url, versionMatch[1])

packages/vite/src/node/utils.ts

@@ -118,7 +118,7 @@ export const isJSRequest = (url: string): boolean => {
   return false
 }
 
-const importQueryRE = /(\?|&)import(?:&|$)/
+const importQueryRE = /(\?|&)import=?(?:&|$)/
 const trailingSeparatorRE = /[\?&]$/
 export const isImportRequest = (url: string): boolean => importQueryRE.test(url)