https://developer.mozilla.org › en-US › docs › Web › API › Window › unhandledrejection_event

The unhandledrejection event is sent to the global scope of a script when a JavaScript Promise that has no rejection handler is rejected; typically, this is the window, but may also be a Worker. This is useful for debugging and for providing fallback error handling for unexpected situations.

https://stackoverflow.com › questions › 40500490

This is when a Promise is completed with .reject() or an exception was thrown in an async executed code and no .catch() did handle the rejection. A rejected promise is like an exception that bubbles up towards the application entry point and causes the root error handler to produce that output. See also.

https://stackoverflow.com › questions › 31472439

I would like to catch all unhandled exceptions/rejections that take place within a javascript Promise. Is there a good method for catching them without adding a .catch(..) on each end of the Promise chain? (in case of forgetting to add this, the error silently disappears).

https://hatchjs.com › possible-unhandled-promise-rejection

Learn what a possible unhandled promise rejection is and how to prevent it in your JavaScript code. This common error can cause your app to crash, so it's important to know how to fix it. With this guide, you'll be able to identify and resolve possible unhandled promise rejections in no time.

https://hatchjs.com › unhandledpromiserejectionwarning-unhandled-promise-rejection

Learn what is unhandled promise rejection and how to fix it with 3 easy steps. This guide will help you troubleshoot and resolve unhandled promise rejection errors in your JavaScript code, so you can get your app back up and running quickly.

https://developer.mozilla.org › en-US › docs › Web › API › PromiseRejection

The PromiseRejectionEvent interface represents events which are sent to the global script context when JavaScript Promises are rejected. These events are particularly useful for telemetry and debugging purposes.

https://www.educative.io › courses › javascript-promises › how-to-detect-an-unhandled-rejection

Learn how to detect unhandled rejections and how a web browser tracks them. We'll cover the following. Handling promise rejection. In the first generation of promises, a rejected promise without a rejection handler would silently fail.

https://javascript.info › promise-error-handling

In non-browser environments like Node.js there are other ways to track unhandled errors. Summary .catch handles errors in promises of all kinds: be it a reject() call, or an error thrown in a handler.

https://developer.mozilla.org › en-US › docs › Web › API › WorkerGlobalScope › unhandledrejection...

The unhandledrejection event is sent to the global scope (typically WorkerGlobalScope) of a script when a Promise that has no rejection handler is rejected. This is useful for debugging and for providing fallback error handling for unexpected situations. Syntax.