AbortSignal.any ponyfill

follow-abort-signal.ts

export const followAbortSignal = (signals: (AbortSignal | undefined)[]) => {
	const controller = new AbortController();
	const own = controller.signal;

	for (let idx = 0, len = signals.length; idx < len; idx++) {
		const signal = signals[idx];

		if (!signal) {
			continue;
		}

		if (signal.aborted) {
			controller.abort(signal.reason);
			break;
		}

		signal.addEventListener('abort', () => controller.abort(signal.reason), { signal: own });
	}

	return own;
};