diff --git a/packages/vite/src/node/plugins/asset.ts b/packages/vite/src/node/plugins/asset.ts
index 622abc6f17c370..15a55a36336869 100644
--- a/packages/vite/src/node/plugins/asset.ts
+++ b/packages/vite/src/node/plugins/asset.ts
@@ -90,7 +90,7 @@ export function renderAssetUrlInJS(
     s ||= new MagicString(code)
     const [full, referenceId, postfix = ''] = match
     const file = ctx.getFileName(referenceId)
-    getChunkMetadata(chunk.fileName)!.importedAssets.add(cleanUrl(file))
+    getChunkMetadata(chunk.name)!.importedAssets.add(cleanUrl(file))
     const filename = file + postfix
     const replacement = toOutputFilePathInJS(
       filename,
diff --git a/packages/vite/src/node/plugins/css.ts b/packages/vite/src/node/plugins/css.ts
index c9a0f576fb981e..a70de15f9bfd52 100644
--- a/packages/vite/src/node/plugins/css.ts
+++ b/packages/vite/src/node/plugins/css.ts
@@ -599,7 +599,7 @@ export function cssPostPlugin(config: ResolvedConfig): Plugin {
         // replace asset url references with resolved url.
         chunkCSS = chunkCSS.replace(assetUrlRE, (_, fileHash, postfix = '') => {
           const filename = this.getFileName(fileHash) + postfix
-          getChunkMetadata(chunk.fileName)!.importedAssets.add(cleanUrl(filename))
+          getChunkMetadata(chunk.name)!.importedAssets.add(cleanUrl(filename))
           return encodeURIPath(
             toOutputFilePathInCss(
               filename,
@@ -768,7 +768,7 @@ export function cssPostPlugin(config: ResolvedConfig): Plugin {
             generatedAssets
               .get(config)!
               .set(referenceId, { originalName: originalFilename, isEntry })
-              getChunkMetadata(chunk.fileName)!.importedCss.add(this.getFileName(referenceId))
+              getChunkMetadata(chunk.name)!.importedCss.add(this.getFileName(referenceId))
           } else if (!config.build.ssr) {
             // legacy build and inline css
 
@@ -828,9 +828,9 @@ export function cssPostPlugin(config: ResolvedConfig): Plugin {
     },
 
     augmentChunkHash(chunk) {
-      if (getChunkMetadata(chunk.fileName)?.importedCss.size) {
+      if (getChunkMetadata(chunk.name)?.importedCss.size) {
         let hash = ''
-        for (const id of getChunkMetadata(chunk.fileName)!.importedCss) {
+        for (const id of getChunkMetadata(chunk.name)!.importedCss) {
           hash += id
         }
         return hash
@@ -923,10 +923,10 @@ export function cssPostPlugin(config: ResolvedConfig): Plugin {
               if (pureCssChunkNames.includes(file)) {
                 const { importedCss, importedAssets } =  getChunkMetadata((bundle[file] as OutputChunk).fileName)!
                 importedCss.forEach((file) =>
-                  getChunkMetadata(chunk.fileName)!.importedCss.add(file),
+                  getChunkMetadata(chunk.name)!.importedCss.add(file),
                 )
                 importedAssets.forEach((file) =>
-                  getChunkMetadata(chunk.fileName)!.importedAssets.add(file),
+                  getChunkMetadata(chunk.name)!.importedAssets.add(file),
                 )
                 chunkImportsPureCssChunk = true
                 return false
diff --git a/packages/vite/src/node/plugins/html.ts b/packages/vite/src/node/plugins/html.ts
index bd4d55f9555db6..ac3431b6c6704c 100644
--- a/packages/vite/src/node/plugins/html.ts
+++ b/packages/vite/src/node/plugins/html.ts
@@ -759,7 +759,7 @@ export function buildHtmlPlugin(config: ResolvedConfig): Plugin {
           })
         }
 
-        getChunkMetadata(chunk.fileName)!.importedCss.forEach((file) => {
+        getChunkMetadata(chunk.name)!.importedCss.forEach((file) => {
           if (!seen.has(file)) {
             seen.add(file)
             tags.push({
@@ -907,7 +907,7 @@ export function buildHtmlPlugin(config: ResolvedConfig): Plugin {
         result = result.replace(assetUrlRE, (_, fileHash, postfix = '') => {
           const file = this.getFileName(fileHash)
           if (chunk) {
-            getChunkMetadata(chunk.fileName)!.importedAssets.add(cleanUrl(file))
+            getChunkMetadata(chunk.name)!.importedAssets.add(cleanUrl(file))
           }
           return encodeURIPath(toOutputAssetFilePath(file)) + postfix
         })
diff --git a/packages/vite/src/node/plugins/importAnalysisBuild.ts b/packages/vite/src/node/plugins/importAnalysisBuild.ts
index 9c4c31b6387973..d6c2fd4bebf0a0 100644
--- a/packages/vite/src/node/plugins/importAnalysisBuild.ts
+++ b/packages/vite/src/node/plugins/importAnalysisBuild.ts
@@ -543,7 +543,7 @@ export function buildImportAnalysisPlugin(config: ResolvedConfig): Plugin {
                       chunk.imports.forEach(addDeps)
                       // Ensure that the css imported by current chunk is loaded after the dependencies.
                       // So the style of current chunk won't be overwritten unexpectedly.
-                      getChunkMetadata(chunk.fileName)!.importedCss.forEach((file) => {
+                      getChunkMetadata(chunk.name)!.importedCss.forEach((file) => {
                         deps.add(file)
                       })
                     }
@@ -552,8 +552,8 @@ export function buildImportAnalysisPlugin(config: ResolvedConfig): Plugin {
                       removedPureCssFilesCache.get(config)!
                     const chunk = removedPureCssFiles.get(filename)
                     if (chunk) {
-                      if (getChunkMetadata(chunk.fileName)!.importedCss.size) {
-                        getChunkMetadata(chunk.fileName)!.importedCss.forEach((file) => {
+                      if (getChunkMetadata(chunk.name)!.importedCss.size) {
+                        getChunkMetadata(chunk.name)!.importedCss.forEach((file) => {
                           deps.add(file)
                         })
                         hasRemovedPureCssChunk = true
diff --git a/packages/vite/src/node/plugins/manifest.ts b/packages/vite/src/node/plugins/manifest.ts
index c2f28383371cc9..8a88fcca6333e4 100644
--- a/packages/vite/src/node/plugins/manifest.ts
+++ b/packages/vite/src/node/plugins/manifest.ts
@@ -89,11 +89,11 @@ export function manifestPlugin(config: ResolvedConfig): Plugin {
           }
         }
 
-        if (getChunkMetadata(chunk.fileName)?.importedCss.size) {
-          manifestChunk.css = [...getChunkMetadata(chunk.fileName)!.importedCss]
+        if (getChunkMetadata(chunk.name)?.importedCss.size) {
+          manifestChunk.css = [...getChunkMetadata(chunk.name)!.importedCss]
         }
-        if (getChunkMetadata(chunk.fileName)?.importedAssets.size) {
-          manifestChunk.assets = [...getChunkMetadata(chunk.fileName)!.importedAssets]
+        if (getChunkMetadata(chunk.name)?.importedAssets.size) {
+          manifestChunk.assets = [...getChunkMetadata(chunk.name)!.importedAssets]
         }
 
         return manifestChunk
diff --git a/packages/vite/src/node/plugins/metadata.ts b/packages/vite/src/node/plugins/metadata.ts
index 758fa356c562d1..a32acb01a1d3df 100644
--- a/packages/vite/src/node/plugins/metadata.ts
+++ b/packages/vite/src/node/plugins/metadata.ts
@@ -17,7 +17,7 @@ export function metadataPlugin(): Plugin {
     async renderChunk(_code, chunk) {
       // Since the chunk come from rust side, mutate it directly will not sync back to rust side.
       // The next usage will lost the metadata
-      chunkMetadataMap.set(chunk.fileName, {
+      chunkMetadataMap.set(chunk.name, {
         importedAssets: new Set(),
         importedCss: new Set(),
       })
@@ -26,6 +26,6 @@ export function metadataPlugin(): Plugin {
   }
 }
 
-export function getChunkMetadata(fileName: string): ChunkMetadata | undefined {
-  return chunkMetadataMap.get(fileName)
+export function getChunkMetadata(name: string): ChunkMetadata | undefined {
+  return chunkMetadataMap.get(name)
 }
\ No newline at end of file
diff --git a/packages/vite/src/node/ssr/ssrManifestPlugin.ts b/packages/vite/src/node/ssr/ssrManifestPlugin.ts
index 362a600982d82c..152dc46f607576 100644
--- a/packages/vite/src/node/ssr/ssrManifestPlugin.ts
+++ b/packages/vite/src/node/ssr/ssrManifestPlugin.ts
@@ -36,11 +36,11 @@ export function ssrManifestPlugin(config: ResolvedConfig): Plugin {
               mappedChunks.push(joinUrlSegments(base, chunk.fileName))
               // <link> tags for entry chunks are already generated in static HTML,
               // so we only need to record info for non-entry chunks.
-              getChunkMetadata(chunk.fileName)!.importedCss.forEach((file) => {
+              getChunkMetadata(chunk.name)!.importedCss.forEach((file) => {
                 mappedChunks.push(joinUrlSegments(base, file))
               })
             }
-            getChunkMetadata(chunk.fileName)!.importedAssets.forEach((file) => {
+            getChunkMetadata(chunk.name)!.importedAssets.forEach((file) => {
               mappedChunks.push(joinUrlSegments(base, file))
             })
           }
@@ -78,7 +78,7 @@ export function ssrManifestPlugin(config: ResolvedConfig): Plugin {
                   analyzed.add(filename)
                   const chunk = bundle[filename] as OutputChunk | undefined
                   if (chunk) {
-                    getChunkMetadata(chunk.fileName)!.importedCss.forEach((file) => {
+                    getChunkMetadata(chunk.name)!.importedCss.forEach((file) => {
                       deps.push(joinUrlSegments(base, file)) // TODO:base
                     })
                     chunk.imports.forEach(addDeps)