Fixes https://github.com/microsoft/monaco-editor/issues/4992

build/amd/src/editor.main.js

@@ -60,7 +60,7 @@ import '../../../src/language/html/monaco.contribution';
 import '../../../src/language/json/monaco.contribution';
 import '../../../src/language/typescript/monaco.contribution';
 
-const styleSheetUrl = require.toUrl('vs/style.css');
+const styleSheetUrl = require.toUrl('vs/editor/editor.main.css');
 
 const link = document.createElement('link');
 link.rel = 'stylesheet';

build/amd/vite.config.js

@@ -26,7 +26,7 @@ export default defineConfig(async (args) => {
 		},
 		build: {
 			lib: {
-				cssFileName: () => 'editor/editor.main.css',
+				cssFileName: 'editor/editor.main',
 				entry: {
 					...nlsEntries,
 					'nls.messages-loader': resolve(__dirname, 'src/nls.messages-loader.js'),