Created
May 27, 2019 18:49
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resolve/reject a promise from outside its scope
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export interface ExternalizedPromise<T> { | |
promise: Promise<T>; | |
resolve: (value?: T | PromiseLike<T>) => void; | |
reject: (reason?: any) => void; | |
} | |
export default { | |
create: function create<T>( | |
executor: (resolve: (value?: T | PromiseLike<T>) => void, rejector: (reason?: any) => void) => void | |
): ExternalizedPromise<T> { | |
let resolve; | |
let reject; | |
const promise = new Promise<T>((paramResolve, paramReject) => { | |
resolve = paramResolve; | |
reject = paramReject; | |
executor(resolve, reject); | |
}); | |
return { | |
resolve, | |
reject, | |
promise, | |
}; | |
}, | |
resolve: function resolve<T>(value?: T) { | |
const externalizedPromise = this.create((_resolve) => _resolve(value)); | |
externalizedPromise.resolve(); | |
return externalizedPromise; | |
}, | |
reject: function reject<T>(value?: T) { | |
const externalizedPromise = this.create((_, _reject) => _reject(value)); | |
externalizedPromise.resolve(); | |
return externalizedPromise; | |
}, | |
}; |
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