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/**
* A `Promise.withResolvers` implementation that exposes the `resolve` and
* `reject` functions on a `Promise`.
*
* @see https://tc39.es/proposal-promise-with-resolvers/
*/
export class DetachedPromise<T = any> {
public readonly resolve: (value: T | PromiseLike<T>) => void
public readonly reject: (reason: any) => void
public readonly promise: Promise<T>
constructor() {
let resolve: (value: T | PromiseLike<T>) => void
let reject: (reason: any) => void
// Create the promise and assign the resolvers to the object.
this.promise = new Promise<T>((res, rej) => {
resolve = res
reject = rej
})
// We know that resolvers is defined because the Promise constructor runs
// synchronously.
this.resolve = resolve!
this.reject = reject!
}
}
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