serwist
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A Swiss Army knife for service workers.
34 lines (29 loc) • 844 B
text/typescript
/*
Copyright 2018 Google LLC
Use of this source code is governed by an MIT-style
license that can be found in the LICENSE file or at
https://opensource.org/licenses/MIT.
*/
/**
* The Deferred class composes Promises in a way that allows for them to be
* resolved or rejected from outside the constructor. In most cases promises
* should be used directly, but Deferreds can be necessary when the logic to
* resolve a promise must be separate.
*
* @private
*/
class Deferred<T> {
promise: Promise<T>;
resolve!: (value: T) => void;
reject!: (reason?: any) => void;
/**
* Creates a promise and exposes its resolve and reject functions as methods.
*/
constructor() {
this.promise = new Promise((resolve, reject) => {
this.resolve = resolve;
this.reject = reject;
});
}
}
export { Deferred };