Timeout an Promise

promise-timeout.js

function timeoutPromise(prom, time) {
	let timer;

	return Promise.race([
		prom,
		new Promise(
			(_r, rej) =>
				(timer = setTimeout(rej, time, new Error("Promise timed out")))
		),
	]).finally(() => clearTimeout(timer));
}

async function customPromise() {
	await new Promise((res) => setTimeout(res, 500));
}

async function main() {
	try {
		await timeoutPromise(customProm(), 100);
	} catch (error) {
		console.log(error);
	}
}

main(); // Error: Promise timed out