fix(ssr): emit js sourcemaps for ssr builds (#11343)

Author: thebanjomatic

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

@@ -23,6 +23,7 @@ export const assetUrlRE = /__VITE_ASSET__([a-z\d]+)__(?:\$_(.*?)__)?/g
 
 const rawRE = /(?:\?|&)raw(?:&|$)/
 const urlRE = /(\?|&)url(?:&|$)/
+const jsSourceMapRE = /\.[cm]?js\.map$/
 
 const assetCache = new WeakMap<ResolvedConfig, Map<string, string>>()
 
@@ -190,7 +191,8 @@ export function assetPlugin(config: ResolvedConfig): Plugin {
         for (const file in bundle) {
           if (
             bundle[file].type === 'asset' &&
-            !file.includes('ssr-manifest.json')
+            !file.endsWith('ssr-manifest.json') &&
+            !jsSourceMapRE.test(file)
           ) {
             delete bundle[file]
           }