HTML (HyperText Markup Language) is the standard markup language used to create web pages. It provides the structure and content of websites, working alongside CSS for styling and JavaScript for interactivity.
CSS (Cascading Style Sheets) is used to style and layout web pages. It controls colors, fonts, spacing, positioning, and responsive design. CSS works by selecting HTML elements and applying styling rules to them.
JavaScript is a programming language that adds interactivity to web pages. It allows you to create dynamic content, handle user interactions, validate forms, and build complex web applications. This expand/collapse widget is powered by JavaScript!