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* Global error interceptor to suppress Monaco's hitTest null reference errors
* This module should be imported once at the application root
*/
// Debug mode
const DEBUG = false; // Disable after testing
import { Logger } from "../../../shared/logger";
const logger = new Logger("MonacoErrorSuppressor");
const log = (msg: string, ...args: unknown[]) => {
Iif (DEBUG) {
logger.debug(`[Monaco Error Suppressor] ${msg}`, ...(args as []));
}
};
log("Module loaded");
// First, patch the global error handler used by Monaco itself
// This prevents the error from being thrown in the first place
declare global {
interface GlobalThis {
__MONACO_EDITOR_ERROR_HANDLER__?: {
onUnexpectedError: (error: unknown) => void;
};
}
}
(globalThis as any).__MONACO_EDITOR_ERROR_HANDLER__ = {
onUnexpectedError: (error: unknown) => {
let message = "";
let stack = "";
if (error instanceof Error) {
message = error.message;
stack = error.stack ?? "";
} else {
message = String(error);
}
if (
(message.includes("offsetNode") && message.includes("hitResult")) ||
stack.includes("_doHitTestWithCaretPositionFromPoint")
) {
log(
"Intercepted Monaco internal error handler - suppressing hitTest error",
);
return; // Suppress by not rethrowing
}
// Let other errors through
Eif (typeof console !== "undefined" && console.error) {
console.error(error);
}
},
};
// Suppress Monaco hitTest errors globally
const originalError = console.error;
const originalWarn = console.warn;
const isMonacoHitTestError = (args: unknown[]): boolean => {
if (args.length === 0) return false;
const firstArg = args[0];
if (!firstArg || typeof firstArg !== 'object') return false;
let message = "";
let stack = "";
if (firstArg instanceof Error) {
message = firstArg.message;
stack = firstArg.stack ?? "";
} else {
const obj = firstArg as Record<string, unknown>;
message = typeof obj.message === "string" ? obj.message : JSON.stringify(firstArg);
}
const isError =
(message.includes("offsetNode") && message.includes("hitResult")) ||
stack.includes("_doHitTestWithCaretPositionFromPoint") ||
(message.includes("can't access property") &&
message.includes("hitResult is null"));
if (isError) {
log(`Detected Monaco hitTest error: ${message.slice(0, 150)}`);
}
return isError;
};
console.error = function (...args: unknown[]) {
if (isMonacoHitTestError(args)) {
log("Suppressed error via console.error");
return;
}
originalError.apply(console, args as any);
};
console.warn = function (...args: unknown[]) {
if (isMonacoHitTestError(args)) {
log("Suppressed warning via console.warn");
return;
}
originalWarn.apply(console, args as any);
};
// Intercept uncaught errors at the earliest point
const originalErrorHandler = globalThis.onerror;
globalThis.onerror = function (message, source, lineno, colno, error) {
const errorMessage = typeof message === "string" ? message : "";
const errorStack = error?.stack || "";
if (
(errorMessage.includes("offsetNode") &&
errorMessage.includes("hitResult")) ||
errorStack.includes("_doHitTestWithCaretPositionFromPoint")
) {
log("Suppressed error via window.onerror");
return true; // Suppress
}
Iif (originalErrorHandler) {
return originalErrorHandler(message, source, lineno, colno, error);
}
return false;
};
// Capture errors before they bubble up
globalThis.addEventListener(
"error",
(event: ErrorEvent) => {
if (isMonacoHitTestError([event.error])) {
log(
"Suppressed error via error event listener (stopImmediatePropagation)",
);
event.preventDefault();
event.stopImmediatePropagation();
}
},
true,
);
// Handle unhandled promise rejections
globalThis.addEventListener(
"unhandledrejection",
(event: PromiseRejectionEvent) => {
const reason = event.reason;
if (reason && isMonacoHitTestError([reason])) {
log("Suppressed rejection via unhandledrejection listener");
event.preventDefault();
}
},
true,
);
// Remove error overlays if they appear (Replit's runtime error modal)
Eif (typeof MutationObserver !== "undefined") {
const observer = new MutationObserver((mutations) => {
mutations.forEach((mutation) => {
if (mutation.addedNodes.length) {
mutation.addedNodes.forEach((node) => {
if (node.nodeType === 1) {
// Element node
const element = node as HTMLElement;
const textContent = element.textContent || "";
const innerHTML = element.innerHTML || "";
// Check if this is an error overlay/modal
if (
textContent.includes("offsetNode") ||
innerHTML.includes("offsetNode") ||
textContent.includes("_doHitTestWithCaretPositionFromPoint")
) {
log("Found Monaco hitTest error overlay, removing:", {
class: element.className,
});
element.remove();
}
}
});
}
});
});
// Start observing when DOM is ready
if (document.body) {
log("Attaching MutationObserver to document.body");
observer.observe(document.body, {
childList: true,
subtree: true,
});
} else E{
document.addEventListener("DOMContentLoaded", () => {
log("Attaching MutationObserver on DOMContentLoaded");
observer.observe(document.body, {
childList: true,
subtree: true,
});
});
}
}
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