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Add util for handling promise cancelation to avoid setting state on unmounted components

Browse Source 
https://github.com/facebook/react/issues/5465
This commit is contained in:
Dominik Prokop 2019-01-29 12:10:03 +01:00
parent 433c88a616
commit db17262ea4
1 changed files with 22 additions and 0 deletions
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22
public/app/core/utils/CancelablePromise.ts Normal file
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// https://github.com/facebook/react/issues/5465
export interface CancelablePromise<T> {
promise: Promise<T>;
cancel: () => void;
}
export const makePromiseCancelable = <T>(promise: Promise<T>): CancelablePromise<T> => {
let hasCanceled_ = false;
const wrappedPromise = new Promise<T>((resolve, reject) => {
promise.then(val => (hasCanceled_ ? reject({ isCanceled: true }) : resolve(val)));
promise.catch(error => (hasCanceled_ ? reject({ isCanceled: true }) : reject(error)));
});
return {
promise: wrappedPromise,
cancel() {
hasCanceled_ = true;
},
};
};