JavaScript, or often called JS, is a programming language that is very important in web development today. First envisioned by Brendan Eich in 1995, JavaScript has evolved from just a programming language for adding interactivity to web pages into a powerful ecosystem for building complex web applications. Why is JavaScript So Important? JavaScript is the only programming language supported by all major browsers such as Chrome, Firefox, Safari, and Edge. This makes it a universal language for web development, as any internet user can run JavaScript code without having to install additional plugins or additional software. Key Features of Dynamic and Interactive JavaScript: JavaScript allows developers to add interactive effects into web pages, such as animations, transition effects, and direct responses to user input. Asynchronous Programming: With support for non-blocking operations, JavaScript is able to manage processes that take a long time without stopping the execution of the main program. Frameworks and Libraries: JavaScript has various frameworks and libraries that speed up web application development, such as React.js, Angular, and Vue.js, which enable developers to build complex UIs easily. Use of JavaScript in Web Development JavaScript is widely used for development: Front-end Development: Control user interactions, form validation, UI/UX animations, and more.