What is an advantage of using JavaScript in web development?

Using JavaScript in web development enhances the user interface by making it interactive. This is one of its key advantages, as JavaScript allows developers to create dynamic content that responds to user actions, such as clicks, while ensuring a smooth and engaging experience. For instance, JavaScript enables features such as form validation, interactive maps, animated graphics, and real-time updates on web pages without needing a page refresh.

This interactivity improves user engagement and can lead to higher satisfaction and usability of web applications. Such enhancements play a significant role in modern web design, where user experience is paramount. The ability to manipulate the Document Object Model (DOM) in real time allows developers to provide a more responsive and appealing interface, which is crucial for retaining users.