Promise.race

race — A new Promise for when one Promise is completed (resolved or rejected), whichever is completed first.

Description

Promise.race(iterable promises)

Parameters

Return values

A new Promise that resovles when one promise in the input array are completed.

Changelog

Examples

Example #1 – Promise.race example

Run
let mypromise1 = new Promise(resolve => {
	resolve('resolved promise 1! :)');
});
let mypromise2 = new Promise((resolve, reject) => {
	resolve('resolved promise 2! :)');
});

Promise.race([mypromise1, mypromise2]).then(result => {
	console.log(result);
});

Example #2 – Promise.race example

Run
let mypromise1 = new Promise(resolve => {
	setTimeout(() => {
		resolve('resolved promise 1! :)');
	}, 1000);
});
let mypromise2 = new Promise((resolve, reject) => {
	setTimeout(() => {
		resolve('resolved promise 2! :)');
	}, 500);
});

Promise.race([mypromise1, mypromise2]).then(result => {
	console.log(result);
});

External references

• Mozilla: Promise.race method