var p1 = Promise.resolve(3);<br /><br /> var p2 = 1337;<br /><br /> var p3 = new Promise((resolve, reject) => {<br /><br /> setTimeout(resolve, 100, “foo”);<br /><br /> }); </p><br /> <p>Promise.all([p1, p2, p3]).then(values => {<br /><br /> console.log(values); // [3, 1337, “foo”]<br /><br /> });

const promise1 = Promise.resolve(3);<br /><br /> const promise2 = 42;<br /><br /> const promise3 = new Promise(function(resolve, reject) {<br /><br /> setTimeout(resolve, 100, ‘foo’);<br /><br /> });</p><br /> <p>Promise.all([promise1, promise2, promise3]).then(function(values) {<br /><br /> console.log(values);<br /><br /> });<br /><br /> // expected output: Array [3, 42, “foo”]<br /><br />

try {<br /><br /> const [res1, res2, res3] = await Promise.all([<br /><br /> Promise1,<br /><br /> Promise2,<br /><br /> Promise3,<br /><br /> ]);<br /><br /> } catch (err) {<br /><br /> console.error(err);<br /><br /> }<br /><br />

var p1 = new Promise((resolve, reject) => {<br /><br /> setTimeout(resolve, 1000, “one”);<br /><br /> });<br /><br /> var p2 = new Promise((resolve, reject) => {<br /><br /> setTimeout(resolve, 2000, “two”);<br /><br /> });<br /><br /> var p3 = new Promise((resolve, reject) => {<br /><br /> setTimeout(resolve, 3000, “three”);<br /><br /> });<br /><br /> var p4 = new Promise((resolve, reject) => {<br /><br /> setTimeout(resolve, 4000, “four”);<br /><br /> });<br /><br /> var p5 = new Promise((resolve, reject) => {<br /><br /> reject(“reject”);<br /><br /> });</p><br /> <p>Promise.all([p1, p2, p3, p4, p5]).then(values => {<br /><br /> console.log(values);<br /><br /> }, reason => {<br /><br /> console.log(reason)<br /><br /> });</p><br /> <p>//From console:<br /><br /> //”reject”</p><br /> <p>// Evenly, it’s possible to use .catch<br /><br /> Promise.all([p1, p2, p3, p4, p5]).then(values => {<br /><br /> console.log(values);<br /><br /> }).catch(reason => {<br /><br /> console.log(reason)<br /><br /> });</p><br /> <p>//From console:<br /><br /> //”reject”</p><br /> <p>

// PARALLEL PROMISES<br /><br /> async function fetchMoviesAndCategories() {<br /><br /> const [moviesResponse, categoriesResponse] = await Promise.all([<br /><br /> fetch(‘/movies’),<br /><br /> fetch(‘/categories’)<br /><br /> ]);</p><br /> <p> const movies = await moviesResponse.json();<br /><br /> const categories = await categoriesResponse.json();</p><br /> <p> return [movies, categories];<br /><br /> }

const video1 = new Promise((resolve, reject) => {<br /><br /> resolve(“video1 loaded”);<br /><br /> });<br /><br /> const video2 = new Promise((resolve, reject) => {<br /><br /> resolve(“Video2 loaded”);<br /><br /> });<br /><br /> const video3 = new Promise((resolve, reject) => {<br /><br /> resolve(“video3 loaded”);<br /><br /> });</p><br /> <p>Promise.all([video1, video2, video3]).then((messages) => {<br /><br /> console.log(“messages”, messages);<br /><br /> });

const contentPromise = requestUser();<br /><br /> const commentsPromise = requestComments();</p><br /> <p> const combinedContent = Promise.all([contentPromise, commentsPromise])<br /><br /> .then(([content, comments]) => {<br /><br /> // content and comments have both finished loading.<br /><br /> })

var p1 = Promise.resolve(3);<br /><br /> var p2 = 1337;<br /><br /> var p3 = new Promise((resolve, reject) => {<br /><br /> setTimeout(resolve, 100, “foo”);<br /><br /> });</p><br /> <p>Promise.all([p1, p2, p3]).then(values => {<br /><br /> console.log(values); // [3, 1337, “foo”]<br /><br /> });

var arr = [<br /><br /> {subarr: [1,2,3]},<br /><br /> {subarr: [4,5,6]},<br /><br /> {subarr: [7,8,9]}<br /><br /> ];<br /><br /> function processAsync(n) {<br /><br /> return new Promise(function(resolve) {<br /><br /> setTimeout(<br /><br /> function() { resolve(n * n); },<br /><br /> Math.random() * 1e3<br /><br /> );<br /><br /> });<br /><br /> }<br /><br /> Promise.all(arr.map(function(entity){<br /><br /> return Promise.all(entity.subarr.map(function(item){<br /><br /> return processAsync(item);<br /><br /> }));<br /><br /> })).then(function(data) {<br /><br /> console.log(data);<br /><br /> });

const [toto, tata, titi] = await Promise.all([getToto, getTata, getTiti]);