Fixes microsoft#99656

Eric Amodio · Eric Amodio · commit 3d4ced42d0f8 · 2020-06-09T10:59:49.000-04:00
diff --git a/extensions/vscode-web-playground/src/memfs.ts b/extensions/vscode-web-playground/src/memfs.ts
@@ -81,10 +81,7 @@ export class MemFS implements FileSystemProvider, FileSearchProvider, TextSearch
 
 	constructor() {
 		this.disposable = Disposable.from(
-			workspace.registerFileSystemProvider(MemFS.scheme, this, {
-				isCaseSensitive: true,
-				isReadonly: true,
-			}),
+			workspace.registerFileSystemProvider(MemFS.scheme, this, { isCaseSensitive: true }),
 			workspace.registerFileSearchProvider(MemFS.scheme, this),
 			workspace.registerTextSearchProvider(MemFS.scheme, this)
 		);
