Parallel Promises

Parallel Promises.markdown

Parallel Promises

Example on how to use in parallel Promises and get value after tasks are completed. Example is using expect library for assertion

A Pen by Vlad Bezden on CodePen.

License.

script.js

'use strict';

/**
 * Increment a given value
 * @param {Number} val
 * @returns {Promise}
 */
const foo = (val) => {
		return new Promise((resolve) => {
			setTimeout(() => {
				resolve(val + 1);
			}, 100);
		});
	},
	/**
	 * Increment a given value
	 * @param {Number} val
	 * @returns {Promise}
	 */
	bar = (val) => {
		return new Promise((resolve) => {
			setTimeout(() => {
				resolve(val + 2);
			}, 200);
		});
	};

Promise.all([foo(1), bar(2)]).then((arr) => {
	expect(arr).toInclude[2, 4];
	expect(arr.length).toEqual(2);
});

console.log('All Tests Passed!');

scripts

<script src="https://npmcdn.com/expect/umd/expect.min.js"></script>