promise all
Promise.all([Promise1, Promise2, Promise3])
.then(result) => {
console.log(result)
})
.catch(error => console.log(`Error in promises ${error}`))promise all
Promise.all([Promise1, Promise2, Promise3])
.then(result) => {
console.log(result)
})
.catch(error => console.log(`Error in promises ${error}`))Promise.all
const promise1 = Promise.resolve(3);
const promise2 = 42;
const promise3 = new Promise(function(resolve, reject) {
setTimeout(resolve, 100, 'foo');
});
Promise.all([promise1, promise2, promise3]).then(function(values) {
console.log(values);
});
// expected output: Array [3, 42, "foo"]javascript promise.all
// PARALLEL PROMISES
async function fetchMoviesAndCategories() {
const [moviesResponse, categoriesResponse] = await Promise.all([
fetch('/movies'),
fetch('/categories')
]);
const movies = await moviesResponse.json();
const categories = await categoriesResponse.json();
return [movies, categories];
}javascript promise all
var p1 = new Promise((resolve, reject) => {
setTimeout(resolve, 1000, "one");
});
var p2 = new Promise((resolve, reject) => {
setTimeout(resolve, 2000, "two");
});
var p3 = new Promise((resolve, reject) => {
setTimeout(resolve, 3000, "three");
});
var p4 = new Promise((resolve, reject) => {
setTimeout(resolve, 4000, "four");
});
var p5 = new Promise((resolve, reject) => {
reject("reject");
});
Promise.all([p1, p2, p3, p4, p5]).then(values => {
console.log(values);
}, reason => {
console.log(reason)
});
//From console:
//"reject"
// Evenly, it's possible to use .catch
Promise.all([p1, p2, p3, p4, p5]).then(values => {
console.log(values);
}).catch(reason => {
console.log(reason)
});
//From console:
//"reject"promise.all
var p1 = Promise.resolve(3);
var p2 = 1337;
var p3 = new Promise((resolve, reject) => {
setTimeout(() => {
resolve("foo");
}, 100);
});
Promise.all([p1, p2, p3]).then(values => {
console.log(values); // [3, 1337, "foo"]
});how to use promise.all
const contentPromise = requestUser();
const commentsPromise = requestComments();
const combinedContent = Promise.all([contentPromise, commentsPromise])
.then(([content, comments]) => {
// content and comments have both finished loading.
})Copyright © 2021 Codeinu
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