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Add finally method to Promise flow definition #16115

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Add finally method to Promise flow definition #16115

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6 changes: 6 additions & 0 deletions flow/Promise.js
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Original file line number Diff line number Diff line change
Expand Up @@ -33,6 +33,12 @@ declare class Promise<+R> {
static race<T>(promises: Array<Promise<T>>): Promise<T>;

// Non-standard APIs
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May want to make a new section for TC-39 proposals, finally() is in Stage 3


// See https://github.com/facebook/fbjs/blob/master/packages/fbjs/src/__forks__/Promise.native.js#L21
finally<U>(
onFinally?: ?(value: any) => Promise<U> | U
): Promise<U>;

done<U>(
onFulfill?: ?(value: R) => mixed,
onReject?: ?(error: any) => mixed
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