diff --git a/packages/angular_devkit/build_angular/src/builders/dev-server/vite-server.ts b/packages/angular_devkit/build_angular/src/builders/dev-server/vite-server.ts
index e7e6ca02f11c..da9b3307f8b8 100644
--- a/packages/angular_devkit/build_angular/src/builders/dev-server/vite-server.ts
+++ b/packages/angular_devkit/build_angular/src/builders/dev-server/vite-server.ts
@@ -228,13 +228,12 @@ export async function setupServer(
             return;
           }
 
-          const code = Buffer.from(codeContents).toString('utf-8');
           const mapContents = outputFiles.get(file + '.map')?.contents;
 
           return {
             // Remove source map URL comments from the code if a sourcemap is present.
             // Vite will inline and add an additional sourcemap URL for the sourcemap.
-            code: mapContents ? code.replace(/^\/\/# sourceMappingURL=[^\r\n]*/gm, '') : code,
+            code: Buffer.from(codeContents).toString('utf-8'),
             map: mapContents && Buffer.from(mapContents).toString('utf-8'),
           };
         },
@@ -262,7 +261,7 @@ export async function setupServer(
             // Resource files are handled directly.
             // Global stylesheets (CSS files) are currently considered resources to workaround
             // dev server sourcemap issues with stylesheets.
-            if (extension !== '.js' && extension !== '.html') {
+            if (extension !== '.html') {
               const outputFile = outputFiles.get(parsedUrl.pathname);
               if (outputFile) {
                 const mimeType = lookupMimeType(extension);