An O(max(array)) sorting algorithm...

sleepSort.js

const sleepSort = async (arr) => {
	const sorted = [];
	const max = Math.max(...arr);
	const min = Math.min(...arr);

	for (let item of arr) {
		setTimeout(() => sorted.push(item), item - min);
	}

	await new Promise((resolve) => setTimeout(resolve, max));

	return sorted;
};

// Example
let arr = [20, 5, 100, 1, 90, 200, 40, 29];
sleepSort(arr).then(console.log);