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@theseyi
Created October 26, 2016 20:31
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Cancelable Promise
const makeCancelable = (promise) => {
let hasCanceled_ = false;
const wrappedPromise = new Promise((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;
},
};
};
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