How to handle Promise fail fast behavior. Credits goes to : https://nmaggioni.xyz/2016/10/13/Avoiding-Promise-all-fail-fast-behavior/

script.js

let p1 = new Promise((resolve, reject) => {
  setTimeout(resolve, 1000, "Everything OK in Promise 1");
});
let p2 = new Promise((resolve, reject) => {
  reject(new Error("Something went wrong in Promise 2!"));
});
let p3 = new Promise((resolve, reject) => {
  setTimeout(resolve, 2000, "Everything OK in Promise 3");
});

const toResultObject = (promise) => {
  return promise
    .then(result => ({ success: true, result }))
    .catch(error => ({ success: false, error }));
};

Promise.all([p1, p2, p3].map(toResultObject)).then((values) => {
  for (let i = 0; i < values.length; ++i) {
    if (!values[i].success) {
      console.log("ERR " + values[i].error);
    } else {
      console.log(values[i].result);
    }
  }
});