How to Detect an Unhandled Rejection
Explore how to detect unhandled promise rejections in JavaScript, understand why they can be difficult to track, and learn how runtimes warn developers to improve error handling in asynchronous programming.
We'll cover the following...
We'll cover the following...
In the first generation of promises, a rejected promise without a rejection handler would silently fail. Many considered this the biggest flaw in the specification because it was the only part of the JavaScript language that didn’t make errors apparent. Later, JavaScript runtimes instituted console warnings to at least notify developers when unhandled rejections occurred, and some runtime environments decided to throw errors. Eventually, unhandled rejection tracking was added to the ...