43 lines
871 B
TypeScript
43 lines
871 B
TypeScript
/**
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* Helper class to asynchronously wait until certain promises are resolved
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*
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* @example
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* ```ts
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* // myService
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* private loaded: Deferred<void> = new Deferred();
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* // after something was done
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* this.loaded.resolve();
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*
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* // myOtherService or myComponent
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* await this.myService.loaded;
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* //
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* ```
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*/
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export class Deferred<T = void> {
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/**
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* The promise to wait for
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*/
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public readonly promise: Promise<T>;
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/**
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* custom resolve function
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*/
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private _resolve: (val?: T) => void;
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/**
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* Creates the promise and overloads the resolve function
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*/
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public constructor() {
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this.promise = new Promise<T>(resolve => {
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this.resolve = resolve;
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});
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}
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/**
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* Entry point for the resolve function
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*/
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public resolve(val?: T): void {
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this._resolve(val);
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}
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}
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