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35 lines
868 B
Text
35 lines
868 B
Text
/*
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Copyright 2018 Google LLC
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Use of this source code is governed by an MIT-style
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license that can be found in the LICENSE file or at
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https://opensource.org/licenses/MIT.
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*/
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import '../_version.js';
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/**
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* The Deferred class composes Promises in a way that allows for them to be
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* resolved or rejected from outside the constructor. In most cases promises
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* should be used directly, but Deferreds can be necessary when the logic to
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* resolve a promise must be separate.
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*
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* @private
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*/
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class Deferred<T> {
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promise: Promise<T>;
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resolve!: (value: T) => void;
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reject!: (reason?: any) => void;
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/**
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* Creates a promise and exposes its resolve and reject functions as methods.
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*/
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constructor() {
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this.promise = new Promise((resolve, reject) => {
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this.resolve = resolve;
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this.reject = reject;
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});
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}
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}
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export {Deferred};
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