Allows all promises to be awaited while capturing values

promiseChain.ts

function noop() {}

type CatchCallback<T> = Parameters<Promise<T>['catch']>[0];

class PromiseChain<T> {
	#chain: Promise<any> = Promise.resolve();
	#values: Array<T> = [];
	add(promise: Promise<T | void | undefined>, promiseCatch: CatchCallback<T> = noop) {
		this.#chain = this.#chain
			.then(() => promise)
			.then((value) => {
				if (typeof value !== 'undefined') {
					this.#values.push(value);
				}
			})
			.catch(promiseCatch);
	}
	values() {
		return this.#chain.then(() => this.#values);
	}
}