It's not that difficult to extend Promises. Show some code that's easy to follow. If cancelled/canceled is too confusing, there are synonyms. function long

It's not that difficult to extend Promises. Show some code that's easy to follow. If cancelled/canceled is too confusing, there are synonyms. function longTask() { return new AbortablePromise((resolve, reject, onAbort) => { const timer = setTimeout(resolve, 1000); onAbort(reason => clearTimeout(timer)); }); } const myTask = longTask .aborted(reason => console.log('Aborted')) .then(result => console.log('Done')) .catch(reason => console.log('Error')); setTimeout(() => myTask.abort('Changed my mind'), 300); I did something similar with reporting progress: https://github.com/numtel/progress-promise https://github.com/numtel/progress-promise