23 lines
605 B
TypeScript
23 lines
605 B
TypeScript
// https://github.com/facebook/react/issues/5465
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export interface CancelablePromise<T> {
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promise: Promise<T>;
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cancel: () => void;
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}
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export const makePromiseCancelable = <T>(promise: Promise<T>): CancelablePromise<T> => {
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let hasCanceled_ = false;
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const wrappedPromise = new Promise<T>((resolve, reject) => {
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promise.then((val) => (hasCanceled_ ? reject({ isCanceled: true }) : resolve(val)));
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promise.catch((error) => (hasCanceled_ ? reject({ isCanceled: true }) : reject(error)));
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});
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return {
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promise: wrappedPromise,
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cancel() {
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hasCanceled_ = true;
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},
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};
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};
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