Monkey patch `Promise.catch`

promise-catch-monkey-patch.js

// Please don't do this in production
// It's only really useful for debugging stuff
globalThis.Promise.prototype.catch = new Proxy(
  globalThis.Promise.prototype.catch,
  {
    apply(target, thisArg, catchArgs) {
      console.log("Promise.prototype.catch called");
      catchArgs[0] = new Proxy(catchArgs[0], {
        apply(target, thisArg, callbackArgs) {
          // callbackArgs[0] is the error passed to the catch callback
          console.log(
            "Promise.prototype.catch callback called with error:\n",
            callbackArgs[0]
          );
          // Sentry.captureException(callbackArgs[0]);
          return target.apply(thisArg, callbackArgs);
        },
      });
      return target.apply(thisArg, catchArgs);
    },
  }
);