Asynchronous JavaScript: Callbacks, Promises, Async/Await Explained
JavaScript is single-threaded, but uses async programming for I/O ops like API requests or file reading. Async/Await simplifies writing async code, replacing callbacks & making Promises more intuitive.
Introduction to Asynchronous JavaScript JavaScript is single-threaded, meaning it can only execute one task at a time. To handle multiple tasks, especially I/O operations like API requests or file reading, JavaScript uses asynchronous programming. This allows other tasks to continue running while waiting for the completion of long-running operations. Callback Functions Initially, asynchronous tasks in JavaScript were handled using callback functions. A callback is a function passed into another function as an argument, which is then executed after the completion of the operation. Ex...