Which programming language is commonly used to make web pages interactive?

JavaScript is the programming language that is most commonly used to make web pages interactive. It allows developers to create dynamic content that can respond to user actions, such as clicks, mouse movements, keyboard input, and more. Through JavaScript, web pages can implement complex features like animations, form validation, and real-time updates, which enhance the overall user experience by allowing for interactivity without the need for page reloads.

HTML (HyperText Markup Language) is essential for structuring content on the web, laying out text and images but does not inherently provide interactivity. CSS (Cascading Style Sheets) is primarily used for styling the appearance of web pages, such as colors, fonts, and layouts, but it does not add interactive capabilities. Python, while a powerful programming language often used in web development for server-side applications, is not typically used for client-side interactions directly in browsers.

JavaScript's capabilities are further enhanced by numerous frameworks and libraries, such as jQuery, React, and Angular, which simplify the process of creating interactive web applications. This makes it the go-to choice for web developers looking to create engaging user interfaces.