Understanding the Promise API in JavaScript Table of contents Understanding the Promise API in JavaScript 1. Promise.all() Use Case Syntax Example 2. Promise.allSettled() Use Case Syntax Example 3. Promise.race() Use Case Syntax Exam...
Types of Promises in JavaScript Promises in JavaScript can be used in multiple ways. Here’s a breakdown of the different types and ways to handle them: 1️⃣ Basic Promise Object A Promise is an object that represents an asynchronous operation. It has...
The Promise object represents the eventual completion (or failure) of an asynchronous operation and its resulting value. In simple words : A Promise is like a guarantee that something will be done in the future. It handles tasks that takes time, lik...
const wait = function (second) { return new Promise(function (resolve) { setTimeout(resolve("WHo??"), second * 1000); }); }; wait(1) .then((r) => { console.log("I am a first call"); console.log(r); return wait(3); }) .then(...
My question to claude.ai for today, for which I have a PRO subscription. myself : whats the best and modern way to sleep for n seconds in JavaScript ? I am interested in latest browsers and not old ones. Latest can be 2024 or even 2025 also. claude...
TL;DR We optimized our Pub/Sub automation script, reducing execution time from over 1 hour to less than 30 seconds using Node.js. Here’s a quick overview of the improvements: Initial Python Script: Sequential processing, took over 1 hour. Improved ...
Callbacks A callback function is a function passed as an argument to another function and executed later. function fetchData(callback) { setTimeout(() => { console.log("Data fetched"); callback(); }, 2000); } function proc...
Before promises, we handled asynchronous operations using callback functions, but callbacks are not a good way to handle asynchronous operations. Callbacks: Callback functions are passed as arguments to asynchronous functions(fetchData) and are exec...
In modern JavaScript applications, managing multiple asynchronous tasks efficiently is crucial for performance optimization. When dealing with a large number of async functions, running too many at once can lead to resource exhaustion, while running ...
Promise is an another way of handling asynchronous operations in JavaScript and they are much better than Callbacks. As we studied in the previous article that callbacks have two major problems Callback Hell and Inversion of Control. Using Promises c...
