chore(monaco): ignore worker errors in console

src/main.tsx

@@ -26,6 +26,10 @@ import {
   UpdateStateProvider,
 } from "./services/states";
 import { disableWebViewShortcuts } from "./utils/disable-webview-shortcuts";
+import {
+  isIgnoredMonacoWorkerError,
+  patchMonacoWorkerConsole,
+} from "./utils/monaco-worker-ignore";
 
 if (!window.ResizeObserver) {
   window.ResizeObserver = ResizeObserver;
@@ -87,12 +91,22 @@ bootstrap().catch((error) => {
     });
 });
 
+patchMonacoWorkerConsole();
+
 // Error handling
 window.addEventListener("error", (event) => {
+  if (isIgnoredMonacoWorkerError(event.error ?? event.message)) {
+    event.preventDefault();
+    return;
+  }
   console.error("[main.tsx] Global error:", event.error);
 });
 
 window.addEventListener("unhandledrejection", (event) => {
+  if (isIgnoredMonacoWorkerError(event.reason)) {
+    event.preventDefault();
+    return;
+  }
   console.error("[main.tsx] Unhandled promise rejection:", event.reason);
 });
 

src/utils/monaco-worker-ignore.ts

@@ -0,0 +1,38 @@
+// These warnings are safe to ignore: they occur when Monaco models or workers are manually disposed.
+const ignoredGlobalErrorMessages = [
+  "Missing requestHandler or method:",
+  "Could not create web worker(s). Falling back to loading web worker code in main thread",
+  "Cannot use 'in' operator to search for 'then' in undefined",
+];
+
+const isIgnoredMessage = (message: string) =>
+  ignoredGlobalErrorMessages.some((snippet) => message.includes(snippet));
+
+export const isIgnoredMonacoWorkerError = (reason: unknown) => {
+  const message = String(
+    reason instanceof Error ? reason.message : (reason ?? ""),
+  );
+  return isIgnoredMessage(message);
+};
+
+const shouldIgnoreConsoleArgs = (args: unknown[]) =>
+  args.some((arg) => {
+    const message =
+      typeof arg === "string" ? arg : arg instanceof Error ? arg.message : "";
+    return isIgnoredMessage(message);
+  });
+
+export const patchMonacoWorkerConsole = () => {
+  const originalWarn = console.warn;
+  const originalError = console.error;
+
+  console.warn = (...args) => {
+    if (shouldIgnoreConsoleArgs(args)) return;
+    originalWarn(...args);
+  };
+
+  console.error = (...args) => {
+    if (shouldIgnoreConsoleArgs(args)) return;
+    originalError(...args);
+  };
+};