JavaScript asynchronous generator and iteration example.

example.js

'use strict';

async function* delayList() {

	function delay(timeout) {

		return new Promise((resolve,reject) => {

			setTimeout(() => resolve(`dealyed for: ${timeout}ms`),timeout);
		});
	}

	for (let ms of [100,200,300,400]) {
		yield await delay(ms);
	}
}

async function main() {
	for await (let item of delayList()) {
		console.log(item);
	}
}

main().then(() => {

	console.log('done');
});

// output:
// dealyed for: 100ms
// dealyed for: 200ms
// dealyed for: 300ms
// dealyed for: 400ms
// done