JavaScript Promise.all()
Example
// Create a Promise
const myPromise1 = new Promise((resolve, reject) => {
setTimeout(resolve, 200, "King");
});
// Create another Promise
const myPromise2 = new Promise((resolve, reject) => {
setTimeout(resolve, 100, "Queen");
});
// Both resolve, who is faster?
Promise.race([myPromise1, myPromise2]).then((x) => {
myDisplay(x);
});
Try it Yourself »
Description
The Promise.all() method returns a single Promise from a list of promises,
when all promises fulfill.
Syntax
Promise.all(iterable)
Parameters
| iterable | An Array of promises |
Return Value
| Type | Description |
| Object | A new Promise Object |
Browser Support
Promise.all() is an ECMAScript6 (ES6) feature.
ES6 (JavaScript 2015) is supported in all modern browsers since June 2017:
| Chrome 51 | Edge 15 | Firefox 54 | Safari 10 | Opera 38 |
| May 2016 | Apr 2017 | Jun 2017 | Sep 2016 | Jun 2016 |
Promise.all() is not supported in Internet Explorer.
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