In our exciting journey of learning JavaScript, we have encountered various functions and methods used to create dynamic web pages. By now, you might understand how HTML is used for webpage layout, and how JavaScript makes it more interactive by manipulating the DOM. In this chapter, we are going to delve deeper and explore Asynchronous JavaScript, which makes our web pages faster and more efficient.

But why do we need Asynchronous JavaScript in the first place? Imagine you are on a shopping website, and you click on a button to view a product. If the JavaScript code for loading the product details is synchronous, the entire web page would freeze until the product details are loaded. This is not a great user experience, is it? To solve this problem and make our web pages more interactive, we use several features in JavaScript like Arrow Functions, Callbacks, the setTimeout method, Promises, and Async/Await. Let's break down each one of these:

Arrow Functions, introduced in ES6, provide a compact and more readable way to write JavaScript functions. Here's an example:

In the context of Arrow Functions, the const keyword is used to declare the function name, followed by the list of parameters in parentheses ( ), the arrow symbol =>, and then the function code inside { } braces.

But how does the same thing look if we were to use regular function syntax? Here's how: