Web technology for developers | MDN

JavaScript programming APIs you can use to build apps on the Web.

HTML provides the fundamental building blocks for structuring Web documents and apps.

Cascading Style Sheets are used to describe the appearance of Web documents and apps.

JavaScript is the Web’s native programming language.

WebAssembly allows programs written in C, C++, Rust, Swift, C#, Go, and more to run on the Web.

Events are what you build Web apps to react to; for example, when a Web page finishes loading, or a user selects something, presses a key, resizes a window, submits a form, or pauses a video.

HTTP is the fundamental Internet protocol for fetching documents, stylesheets, scripts, images, videos, fonts, and other resources over the Web — and for sending data back to Web servers.

Formats, codecs, protocols, APIs, and techniques for embedding and streaming video, audio, and image content in Web documents and apps.

Scalable Vector Graphics lets you create images that scale smoothly to any size.

MathML lets you display complex mathematical notation on the Web.

Web Components are custom elements that you can define and reuse in your Web apps.

WebDriver is a browser-automation mechanism for remotely controlling a browser by emulating the actions of a real person using the browser. It’s widely used for cross-browser testing of Web apps.

Web Extensions are a way for you to give users enhanced capabilities in their browsers — for doing things such as blocking ads and other content, customizing the appearance of pages, and more.

Web App Manifests let you enable users to install Web apps to their device home screens, with aspects such as portrait/landscape screen orientation and display mode (e.g., full screen) pre-set.

Progressive Web Apps provide a user experience similar to native mobile apps.