Promise.race vs Promise.any

index.js

/*
 * Promise.race will first settled either fulfilled or rejected from the iterable object
 *
 * Promise.any find the first fulfilled without concern of reject promise from the iterable object. 
 * If all are rejected promise then it will result an AggregateError.
 *
 */

// On passing first resolve and second reject promise

// output: Fulfilled 1
Promise.race([
    Promise.resolve(1),
    Promise.reject(2)
])
    .then(data => console.log(`Fulfilled ${data}`))
    .catch(error => console.log(`error ocurred for ${error}`));

// output: Fulfilled 1
Promise.any([
    Promise.resolve(1),
    Promise.reject(2)
])
    .then(data => console.log(`Fulfilled ${data}`))
    .catch(error => console.log(`error ocurred for ${error}`));


// On passing first reject and second resolve promise

// output: error ocurred for 1
Promise.race([
    Promise.reject(1),
    Promise.resolve(2)
])
    .then(data => console.log(`Fulfilled ${data}`))
    .catch(error => console.log(`error ocurred for ${error}`));

// output: Fulfilled 2
Promise.any([
    Promise.reject(1),
    Promise.resolve(2)
])
    .then(data => console.log(`Fulfilled ${data}`))
    .catch(error => console.log(`error ocurred for ${error}`));


// On passing all reject promise

// output: error ocurred for 1
Promise.race([
    Promise.reject(1),
    Promise.reject(2)
])
    .then(data => console.log(`Fulfilled ${data}`))
    .catch(error => console.log(`error ocurred for ${error}`));

// output: error ocurred for AggregateError: All promises were rejected
Promise.any([
    Promise.reject(1),
    Promise.reject(2)
])
    .then(data => console.log(`Fulfilled ${data}`))
    .catch(error => console.log(`error ocurred for ${error}`));