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by Developers. Documenting web technologies, including CSS, HTML, and JavaScript, since 2005. MDN Web Docs has the most up-to-date and accurate information and the content is presented in an easy-to-understand manner.
- Learn Web Development
Welcome to the MDN learning area. This set of articles aims...
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The MDN Web Docs site provides information about Open Web...
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The MDN blog publishes web development news, tutorials, and...
- HTML
HTML (HyperText Markup Language) is the most basic building...
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Cascading Style Sheets (CSS) is a stylesheet language used...
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The following interfaces are present in the Performance API:...
- Learn Web Development
Mar 6, 2024 · Welcome to the MDN learning area. This set of articles aims to provide complete beginners to web development with fundamental skills for coding websites. The aim is not to take you from "beginner" to "expert" but to take you from "beginner" to "comfortable."
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HTML (HyperText Markup Language) is the most basic building block of the Web. It defines the meaning and structure of web content. Other technologies besides HTML are generally used to describe a web page's appearance/presentation (CSS) or functionality/behavior (JavaScript).
"Hypertext" refers to links that connect web pages to one another, either within a single website or between websites. Links are a fundamental aspect of the Web. By uploading content to the Internet and linking it to pages created by other people, you become an active participant in the World Wide Web.
HTML uses "markup" to annotate text, images, and other content for display in a Web browser. HTML markup includes special "elements" such as , , , , , , , , , , , , , , , , , , , , , , , , and many others.
An HTML element is set off from other text in a document by "tags", which consist of the element name surrounded by "<" and ">". The name of an element inside a tag is case-insensitive. That is, it can be written in uppercase, lowercase, or a mixture. For example, the tag can be written as , , or in any other way. However, the convention and recommended practice is to write tags in lowercase.
HTML Introduction
If you're new to web development, be sure to read our HTML Basics article to learn what HTML is and how to use it.
HTML Tutorials
For articles about how to use HTML, as well as tutorials and complete examples, check out our HTML Learning Area.
HTML Reference
In our extensive HTML reference section, you'll find the details about every element and attribute in HTML.
Our HTML Learning Area features multiple modules that teach HTML from the ground up — no previous knowledge required.
Introduction to HTML
This module sets the stage, getting you used to important concepts and syntax such as looking at applying HTML to text, how to create hyperlinks, and how to use HTML to structure a web page.
Multimedia and embedding
This module explores how to use HTML to include multimedia in your web pages, including the different ways that images can be included, and how to embed video, audio, and even entire other webpages.
HTML tables
CORS enabled image
The crossorigin attribute, in combination with an appropriate CORS header, allows images defined by the element to be loaded from foreign origins and used in a element as if they were being loaded from the current origin.
CORS settings attributes
Some HTML elements that provide support for CORS, such as or , have a crossorigin attribute (crossOrigin property), which lets you configure the CORS requests for the element's fetched data.
Preloading content with rel="preload"
The preload value of the element's rel attribute allows you to write declarative fetch requests in your HTML , specifying resources that your pages will need very soon after loading, which you therefore want to start preloading early in the lifecycle of a page load, before the browser's main rendering machinery kicks in. This ensures that they are made available earlier and are less likely to block the page's first render, leading to performance improvements. This article provides a basic guide to how preload works.
HTML reference
HTML consists of elements, each of which may be modified by some number of attributes. HTML documents are connected to each other with links.
HTML element reference
Browse a list of all HTML elements.
HTML attribute reference
Elements in HTML have attributes. These are additional values that configure the elements or adjust their behavior in various ways.
Applying color to HTML elements using CSS
This article covers most of the ways you use CSS to add color to HTML content, listing what parts of HTML documents can be colored and what CSS properties to use when doing so. Includes examples, links to palette-building tools, and more.
MDN Web Docs is an open-source, collaborative project documenting Web platform technologies, including CSS, HTML, JavaScript, and Web APIs. We also provide an extensive set of learning resources for beginning developers and students.
Feb 1, 2020 · MDN Web Docs is a wiki that provides developers with in-depth documentation on web technologies such as HTML5, CSS, JavaScript, and more. Learn how to use MDN Web Docs to find syntax, examples, polyfills, and contribute to the open source project.
MDN Web Docs, previously Mozilla Developer Network and formerly Mozilla Developer Center, is a documentation repository and learning resource for web developers. It was started by Mozilla in 2005 as a unified place for documentation about open web standards, Mozilla's own projects, and developer guides.
Feb 24, 2023 · Getting started with MDN Web Docs. We are an open community of developers, technical writers, and learners building resources for a better Web, regardless of brand, browser, or platform. Anyone can contribute, and each person who does contribute makes us stronger.
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