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JavaScript is a versatile programming language used in web development. It can be utilized for various purposes, including creating interactive web forms, handling user input, updating web page content, building complex web applications and games, and more. The language is object-oriented, which means it deals with data and functionality in the form of objects. JavaScript also relies heavily on event-driven programming, allowing it to respond to user actions like clicks, keyboard inputs, and other events. Modern web browsers support JavaScript, making it a cross-browser language. Additionally, JavaScript supports asynchronous programming through features like callbacks, promises, and async/await. Overall, JavaScript is a dynamic and widely-used language that enables web developers to create interactive and engaging web applications.