What is JavaScript?

JavaScript is a versatile, high-level programming language that plays a crucial role in web development. It is primarily used to create dynamic and interactive elements on websites, allowing web pages to respond to user actions without needing to reload the entire page. This capability makes websites more engaging and user-friendly. In web development, JavaScript works alongside HTML and CSS. While HTML provides the structure and CSS handles the styling of a web page, JavaScript adds behavior and interactivity. For example, JavaScript can validate form inputs, create animations, update content dynamically, and handle events like clicks or keyboard input. Beyond the browser, JavaScript is also used on the server side through environments like Node.js, enabling developers to build full-stack applications using a single language. Overall, JavaScript is essential for modern web development because it enhances user experience and enables complex functionality that would be difficult or impossible to achieve with just HTML and CSS.