Other globals

DOMException and PromiseRejectionEvent are globals and follow the WebIDL and HTML standards, including legacy DOMException codes and constants such as DOMException.ABORT_ERR.

Example

// misc.mjs
const error = new DOMException("upload took too long", "TimeoutError");
console.log(error.name, error.code === DOMException.TIMEOUT_ERR, error instanceof Error);

globalThis.addEventListener("unhandledrejection", (event) => {
  event.preventDefault();
  console.log("unhandled:", event.reason.message);
});
Promise.reject(new Error("lost"));

elide run misc.mjs prints:

TimeoutError true true
unhandled: lost

Elide dispatches unhandledrejection on globalThis when a Promise rejects without a handler, and rejectionhandled when a handler is attached later. onunhandledrejection and onrejectionhandled also work.

Reference

Status: Full · Not measured

Exports