Holds callbacks originating from setTimeout , setInterval , setImmediate , and standard DOM events.
const counter = outer(); console.log(counter()); // Output: 1 happy rawat javascript interview questions pdf free upd
Objects inherit properties and methods from their prototype. Holds callbacks originating from setTimeout , setInterval ,
JavaScript is single-threaded, meaning it executes one task at a time. The event loop manages asynchronous operations by offloading tasks like API fetches or timers to the browser web APIs. Once completed, these tasks enter a queue and execute only when the main call stack is entirely empty. 2. High-Frequency Coding Challenges Reversing a String The event loop manages asynchronous operations by offloading
Event loop and microtasks vs macrotasks.
Every time JavaScript code runs, it does so within an Execution Context. You can think of this as an environment or a wrapper that manages the execution of the current code. There are two main types of execution contexts:
What is a Promise and its states?A Promise represents the eventual completion of an async operation. States include Pending, Fulfilled, and Rejected.