fix(legacy): add guard to modern polyfill chunk (#13719)

lsdsjy · web-flow · commit 945dc4de52e6 · 2023-09-20T15:57:16.000+08:00
diff --git a/packages/plugin-legacy/src/index.ts b/packages/plugin-legacy/src/index.ts
@@ -237,7 +237,7 @@ function viteLegacyPlugin(options: Options = {}): Plugin[] {
             `[@vitejs/plugin-legacy] modern polyfills:`,
             modernPolyfills,
           )
-        await buildPolyfillChunk(
+        const polyfillChunk = await buildPolyfillChunk(
           config.mode,
           modernPolyfills,
           bundle,
@@ -247,6 +247,9 @@ function viteLegacyPlugin(options: Options = {}): Plugin[] {
           opts,
           true,
         )
+        if (genLegacy && polyfillChunk) {
+          polyfillChunk.code = modernChunkLegacyGuard + polyfillChunk.code
+        }
         return
       }
 
@@ -734,6 +737,8 @@ async function buildPolyfillChunk(
 
   // add the chunk to the bundle
   bundle[polyfillChunk.fileName] = polyfillChunk
+
+  return polyfillChunk
 }
 
 const polyfillId = '\0vite/legacy-polyfills'

Original file line number	Diff line number	Diff line change
`@@ -237,7 +237,7 @@ function viteLegacyPlugin(options: Options = {}): Plugin[] {`
`237`	`237`	`[@vitejs/plugin-legacy] modern polyfills:`,
`238`	`238`	`modernPolyfills,`
`239`	`239`	`)`
`240`		`- await buildPolyfillChunk(`
	`240`	`+ const polyfillChunk = await buildPolyfillChunk(`
`241`	`241`	`config.mode,`
`242`	`242`	`modernPolyfills,`
`243`	`243`	`bundle,`
`@@ -247,6 +247,9 @@ function viteLegacyPlugin(options: Options = {}): Plugin[] {`
`247`	`247`	`opts,`
`248`	`248`	`true,`
`249`	`249`	`)`
	`250`	`+ if (genLegacy && polyfillChunk) {`
	`251`	`+ polyfillChunk.code = modernChunkLegacyGuard + polyfillChunk.code`
	`252`	`+ }`
`250`	`253`	`return`
`251`	`254`	`}`
`252`	`255`
`@@ -734,6 +737,8 @@ async function buildPolyfillChunk(`
`734`	`737`
`735`	`738`	`// add the chunk to the bundle`
`736`	`739`	`bundle[polyfillChunk.fileName] = polyfillChunk`
	`740`	`+`
	`741`	`+ return polyfillChunk`
`737`	`742`	`}`
`738`	`743`
`739`	`744`	`const polyfillId = '\0vite/legacy-polyfills'`