JavaScript
JavaScript is a programming language that runs in web browsers and can dynamically process content, user actions, interfaces, and application state. It complements HTML and CSS for form validation, navigation, data fetching, and interactive components. With suitable runtimes, JavaScript is also used on servers and in other application environments.
JavaScript should be used deliberately: large script payloads, blocking execution, and unnecessary third parties can harm loading time, stability, privacy, and conversion. Progressive enhancement keeps essential content and functions as robust as possible. Secure implementation includes output encoding, controlled DOM usage, maintained dependencies, and protection against cross-site scripting.
- Programming language for dynamic behaviour
- Runs in browsers and other runtime environments
- Complements HTML and CSS
- Limit script payloads and third parties
- Consider security and progressive enhancement
Frequently asked questions
JavaScript is a programming language for dynamic applications and a core component of modern web browsers.
No. Content and simple functions can work without JavaScript, although it is often required for complex interactions and web applications.
