AbortablePromise
The AbortablePromise class is an extension of the native JavaScript Promise, designed to make it easier to abort promises. It adds an abort signal to the promise, which can trigger rejection of the promise when it's aborted.
How to Use
Create AbortController and pass its signal as a second argument of AbortablePromise constructor:
const controller = new AbortController();
const signal = controller.signal;
const myPromise = new AbortablePromise((resolve, reject) => {
// Do something
}, signal);Or make your existing promise abortable:
const originalPromise = new Promise((resolve, reject) => {
// Do something
});
const myAbortablePromise = makeAbortable(originalPromise, signal);Then call the abort() method
controller.abort();Error handling can be done using the catch method just like with regular promises:
myAbortablePromise.catch(reason => {
console.error('Promise was aborted:', reason);
});By default, AbortablePromise rejects with an "AbortError" DOMException if it is aborted:
setTimeout(() => controller.abort(), 1000);
try {
await myAbortablePromise;
} catch (err) {
if (err.name === 'AbortError') {
console.log("Operation aborted: ", err.message);
}
console.log("Error occurred: ", err);
}Pass any custom object you want the promise to be rejected with to controller.abort():
myAbortablePromise.catch(reason => {
console.log(reason) // { myReason: 42 }
})
controller.abort({ myReason: 42 });