HTML: HyperText Markup Language | MDN

原作者: [db:作者] 来自: 网络收藏邀请

开源软件名称：

开源软件地址：

开源编程语言：

开源软件介绍：

HTML: HyperText Markup Language

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 <head>, <title>, <body>, <header>, <footer>, <article>, <section>, <p>, <div>, <span>, <img>, <aside>, <audio>, <canvas>, <datalist>, <details>, <embed>, <nav>, <output>, <progress>, <video>, <ul>, <ol>, <li> 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 <title> tag can be written as <Title>, <TITLE>, or in any other way. However, the convention and recommended practice is to write tags in lowercase.

The articles below can help you learn more about HTML.

Key resources

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.

Looking to become a front-end web developer?

We have put together a course that includes all the essential information you need to work towards your goal.

Get started

Beginner's tutorials

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: Representing tabular data on a webpage in an understandable, accessible way can be a challenge. This module covers basic table markup, along with more complex features such as implementing captions and summaries.
HTML forms: Forms are a very important part of the Web — these provide much of the functionality you need for interacting with websites, e.g. registering and logging in, sending feedback, buying products, and more. This module gets you started with creating the client-side/front-end parts of forms.
Use HTML to solve common problems: Provides links to sections of content explaining how to use HTML to solve very common problems when creating a web page: dealing with titles, adding images or videos, emphasizing content, creating a basic form, etc.

Advanced topics

CORS enabled image: The crossorigin attribute, in combination with an appropriate CORS header, allows images defined by the <img> element to be loaded from foreign origins and used in a <canvas> element as if they were being loaded from the current origin.
CORS settings attributes: Some HTML elements that provide support for CORS, such as <img> or <video>, 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 <link> element's rel attribute allows you to write declarative fetch requests in your HTML <head>, 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.

Reference

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.
Global attributes: Global attributes may be specified on all HTML elements, even those not specified in the standard. This means that any non-standard elements must still permit these attributes, even though those elements make the document HTML5-noncompliant.
Inline elements and block-level elements: HTML elements are usually "inline" or "block-level" elements. An inline element occupies only the space bounded by the tags that define it. A block-level element occupies the entire space of its parent element (container), thereby creating a "block".
Link types: In HTML, various link types can be used to establish and define the relationship between two documents. Link elements that types can be set on include <a>, <area> and <link>.
Guide to media types and formats on the web: The <audio> and <video> elements allow you to play audio and video media natively within your content without the need for external software support.
HTML content categories: HTML is comprised of several kinds of content, each of which is allowed to be used in certain contexts and is disallowed in others. Similarly, each has a set of other content categories they can contain and elements that can or can't be used in them. This is a guide to these categories.
Quirks mode and standards mode: Historical information on quirks mode and standards mode.

客服电话

电子邮件

HTML: HyperText Markup Language | MDN

开源软件名称：

开源软件地址：

开源编程语言：

开源软件介绍：

HTML: HyperText Markup Language

Key resources

Looking to become a front-end web developer?

Beginner's tutorials

Advanced topics

Reference

Related topics

请发表评论

全部评论

上一篇：

下一篇：

CVE-2022-30526

dphi-official/Machine_Learning_Bootcamp

delphi批量更改文件名

juven/maven-bash-completion: Maven Bash

win7系统注册表编辑器打开的操作方法

剪的笔顺,诠释剪的笔画,认识剪的部首

六六分期app的软件客服如何联系？(六六分期

florent37/ViewAnimator: A fluent Android

florent37/Shrine-MaterialDesign2: implem

CVE-2020-36276

SimpleSoftwareIO/simple-sms: Send and re

关于我们

产品与服务

解决方案

139-2527-9053