Promise.allSettled()

 

Promise.allSettled()

The Promise.allSettled() method returns a promise that resolves after all of the given promises have either fulfilled or rejected, with an array of objects that each describes the outcome of each promise. 


const promise1 = () => new Promise((resolve,reject) => {
setTimeout(() => {
    resolve(1)
},100)
})
const promise2 = () => new Promise((resolve,reject) => {
reject(2)
})
const promise3 = () => new Promise((resolve,reject) => {
setTimeout(() => {
resolve(3)
})
})
Promise.allSettled([promise1(),promise2(),promise3()])
.then((val) => {
console.log(val) // 3
})
.catch((err) => {
console.log(err)
})
// Output:
// [
// { status: 'fulfilled', value: 1 },
// { status: 'rejected', reason: 2 },
 // { status: 'fulfilled', value: 3 } // ] 


const promise1 = Promise.resolve(3);
const promise2 = new Promise((resolve, reject) => setTimeout(reject, 100, 'foo'));
const promises = [promise1, promise2];

Promise.allSettled(promises).
  then((results) => results.forEach((result) => console.log(result.status)));

// expected output:
// "fulfilled"
// "rejected"

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