apple2js/js/components/util/promises.ts

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/**
* Converts a function type returning a `Promise` to a function type returning `void`.
*/
export type NoAwait<F extends (...args: unknown[]) => Promise<unknown>> =
(...args: Parameters<F>) => void;
/**
* Signals that the argument returns a `Promise` that is intentionally not being awaited.
*/
export function noAwait<F extends (...args: unknown[]) => Promise<unknown>>(f: F): NoAwait<F> {
return f as NoAwait<F>;
}
/**
* Utility class that allows a promise to be passed to a
* service to be resolved.
*/
export class Ready {
onError: (value?: unknown) => void;
onReady: (value?: unknown) => void;
ready: Promise<unknown>;
constructor(private errorHandler = console.error) {
this.ready = new Promise((resolve, reject) => {
this.onReady = resolve;
this.onError = reject;
}).catch(this.errorHandler);
}
}