https://stackoverflow.com › questions › 64336083

For example, the following doesn't fire unhandledrejection, because the await continuation handler is attached to p1 synchronously, right after the p1 promise gets created in already rejected state. That makes sense: window.addEventListener("unhandledrejection", event => {.

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

Unhandled promise rejections occur when a promise is rejected and no one handles the rejection. Promise rejections can be caused by errors in your code, by external factors, or by the user. To prevent unhandled promise rejections, you can use try/catch blocks, promise catchers, and rejection handlers.

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

In any case we should have the unhandledrejection event handler (for browsers, and analogs for other environments) to track unhandled errors and inform the user (and probably our server) about them, so that our app never “just dies”.

https://developer.mozilla.org › fr › docs › Web › API › Window › rejectionhandled_event

Cet évènement peut être utilisé pour le débogage et pour la résilience des applications en général. On pourra l'utiliser avec l'évènement unhandledrejection qui est émis lorsqu'une promesse est rompue et qu'elle n'a pas de gestionnaire d'échec à ce moment.

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

Creates a PromiseRejectionEvent event, given the type of event (unhandledrejection or rejectionhandled) and other details.

https://dev.to › superiqbal7 › catching-unhandled-promise-rejections-and-uncaughtexception...

The simplest way to handle unhandled promise rejections is to add a .catch clause within each promise chain call and redirect it to a centralized error handler. However, relying solely on developer discipline is a fragile way of building an error handling strategy.

https://devdoc.net › web › developer.mozilla.org › en-US › docs › Web › Events › unhandledrejection.html

The unhandledrejection event implements the PromiseRejectionEvent interface, which inherits from Event. You can use the properties and methods defined on these interfaces.

http://devdoc.net › web › developer.mozilla.org › en-US › docs › Web › API › WindowEventHandlers › onunhandledrejection.html

The Window.onunhandledrejection property is an event handler for processing unhandledrejection events, which are raised for unhandled Promise rejections. Syntax. window.addEventListener("unhandledrejection", function(event) { ... }); window.onunhandledrejection = function(event) { ...};