HTMLCSSJavaScriptPakete

HTML, CSS, and JavaScript are the core technologies for building web pages. HTML (HyperText Markup Language) provides the structural content of a page, using elements to mark up headings, paragraphs, links, images, and forms. CSS (Cascading Style Sheets) describes how that content is presented, controlling layout, typography, colors, and responsive behavior. JavaScript is a scripting language that enables interactivity and dynamic behavior, allowing pages to respond to user input, fetch data, and modify the document after it has loaded.

Historically, HTML emerged in the early 1990s, CSS in the late 1990s, and JavaScript in 1995. HTML5, CSS3, and the evolving ECMAScript standard define modern capabilities. Web standards are maintained by organizations such as the W3C and WHATWG, and browsers implement these standards to render pages consistently.

In practice, developers write HTML to structure content, CSS to control presentation and layout, and JavaScript to implement interactivity. The Document Object Model (DOM) exposes these elements to JavaScript, enabling dynamic changes. Modern approaches emphasize semantic HTML for accessibility, responsive design with CSS layout modules like Flexbox and Grid, and progressive enhancement to ensure core content remains usable without scripts.

The trio remains foundational for client-side web development, with many patterns, tools, and frameworks built around them. While other technologies exist, HTML, CSS, and JavaScript form the baseline for creating, styling, and behavior on the web.