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Code Issues Packages 1 Wiki Activity

Drop unnecessary Object.assign from createResolvable() (#3548)

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Kevin (Kun) "Kassimo" Qian 2019-12-24 18:59:46 -08:00 committed by Ry Dahl
parent 3bb15ceaea
commit 43fb24f4cd
1 changed files with 15 additions and 10 deletions
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25
cli/js/util.ts
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@ -62,10 +62,13 @@ export function arrayToStr(ui8: Uint8Array): string {
* @internal
*/
export type ResolveFunction<T> = (value?: T | PromiseLike<T>) => void;
// eslint-disable-next-line @typescript-eslint/no-explicit-any
export type RejectFunction = (reason?: any) => void;
export interface ResolvableMethods<T> {
resolve: (value?: T | PromiseLike<T>) => void;
// eslint-disable-next-line @typescript-eslint/no-explicit-any
reject: (reason?: any) => void;
resolve: ResolveFunction<T>;
reject: RejectFunction;
}
// @internal
@ -73,13 +76,15 @@ export type Resolvable<T> = Promise<T> & ResolvableMethods<T>;
// @internal
export function createResolvable<T>(): Resolvable<T> {
let methods: ResolvableMethods<T>;
const promise = new Promise<T>((resolve, reject): void => {
methods = { resolve, reject };
});
// TypeScript doesn't know that the Promise callback occurs synchronously
// therefore use of not null assertion (`!`)
return Object.assign(promise, methods!) as Resolvable<T>;
let resolve: ResolveFunction<T>;
let reject: RejectFunction;
const promise = new Promise<T>((res, rej): void => {
resolve = res;
reject = rej;
}) as Resolvable<T>;
promise.resolve = resolve!;
promise.reject = reject!;
return promise;
}
// @internal