Stop using Promise.all() in JavaScript

What is Promise in JavaScript

If you stumbled upon this article, you're probably familiar with Promises. However, for those new to JavaScript, let's break it down. Essentially, a Promise object represents the eventual completion or failure of an asynchronous operation. Interestingly, when a Promise is created, its value may not be immediately available.

const promise = new Promise((resolve, reject) => {
  // Some asynchronous operation
  if (/* operation is successful */) {
    resolve(result);
  } else {
    reject(error);
  }
});

They have 3 states:

Pending: This is the initial state, neither fulfilled nor rejected
Fulfilled: The state when the promise is completed successfully and yields value
Rejected: The state when an error occurs and the operation in the promise is unsuccessful
Once the promise is resolved, you can use .then() It processes the results and .catch() manages any errors that occur during its execution.

promise
  .then(result => {
    console.log(‘Success:’, result);
  })
  .catch(error => {
    console.error(‘Error:’, error);
  });

Understanding Promise.all()

When handling multiple Promises at the same time, you can take advantage of the built-in Promise.all([]) method. This method accepts a set of Promise and returns a unified Promise