promiseAll.js

/* Promise.all() => Wait for multiple promises to resolve then proceed */
const promise1 = new Promise((resolve, reject) => {
    setTimeout(resolve, 1000, 'Resolving 1');
});
const promise2 = new Promise((resolve, reject) => {
    setTimeout(resolve, 2000, 'Resolving 2');
});
const promise3 = new Promise((resolve, reject) => {
    setTimeout(resolve, 1000, 'Resolving 3');
});
    
// Pass Promise.all an array of promises
Promise.all([
    promise1,
    promise2,
    promise3,
]).then((response) => {
    console.log(response); // Expecting back an array of promise responses 
}).catch((error) => {
    console.log(`If any promise rejects error is caught here: ${error}`);
});

// => Output: [ 'Resolving 1', 'Resolving 2', 'Resolving 3' ]