HTML5 Semantic Element
Semantic = meaning.
Semantic Element = Meaning of element.
What is a semantic element?
A semantic element can Clearly describe its meaning to browsers and developers.
Semantic element examples: <div> and <span> - no need to consider content.
Semantic element examples: <form>, <table>, and <img> - clearly defines its content.
No semantic element examples: <div> and <span> - No need to consider the content.
Semantic element examples: <form>, <table> , and <img> - clearly defines its content.
<title> is a typical semantic tag that defines the title of the document.
New semantic elements in HTML5
Many existing websites contain the following HTML code: <div id="nav">, <div class="header">, or <div id="footer">, to indicate navigation Links, headers, and trailers.
HTML5 provides new semantic elements to identify different parts of a Web page:
<header>
<nav>
<section> ;
<article>
<aside>
<figcaption>
<figure>
<footer>
HTML5 <section> Element
<section> tag defines a section (section, section) in the document. Such as chapters, headers, footers, or other parts of the document.
According to W3C HTML5 documentation: section contains a set of content and its title.
<!DOCTYPE html> <html> <head> <meta charset="utf-8"> <title></title> </head> <body> <section> <h1>沁园春 雪</h1> <p>北国风光， 千里冰封， 万里雪飘。 望长城内外， 惟余茫茫。 大河上下， 顿失滔滔。 山舞银蛇， 原驰蜡象。 欲与天公誓比高。 须睛日， 看红装素裹， 分外妖娆。 江山如此多娇， 引无数英雄竞折腰。 昔秦皇汉武， 略疏文采； 唐宗宋祖， 稍逊风骚。 一代天骄， 成吉思汗， 只识弯弓射大雕。 俱往矣， 数风流人物， 还看今朝。</p> </section> <section> <h1>我爱这土地</h1> <p>假如我是一只鸟， 我也应该用嘶哑的喉咙歌唱： 这被暴风雨所打击着的土地， 这永远汹涌着我们的悲愤的河流， 这无止息地吹刮着的激怒的风， 和那来自林间的无比温柔的黎明</p> </section> </body> </html>
HTML5 <article> Element
<article> tag defines independent content. .
<article> Element usage example:
Forum post
Blog post
News story
Comment
<!DOCTYPE html> <html> <head> <meta charset="utf-8"> <title>php中文网(php.cn)</title> </head> <body> <article> <h1>Internet Explorer 9</h1> <p> Windows Internet Explorer 9(缩写为 IE9 )在2011年3月14日21:00 发布。</p> </article> </body> </html>
HTML5 <nav> Element The
<nav> tag defines the portion of the navigation link. The
<nav> element is used to define the navigation link area of the page. However, not all links need to be included in the <nav> element!
HTML5 <aside> Element The
<aside> tag defines content outside the main area of the page (such as a sidebar).
The content of the aside tag should be related to the content of the main area.
HTML5 <header> element
<header> element describes the head area of the document
<header> element Note that it is used to define the introductory display area of the content.
You can use multiple <header> elements in the page.
HTML5 <footer> Element
The<footer> element describes the bottom area of the document.
The<footer> element should contain its containing element
A footer usually contains the author of the document , copyright information, linked terms of use, contact information, etc.
You can use multiple <footer> elements in the document.
HTML5 <figure> and <figcaption> elements
The<figure> tag specifies independent stream content (images, charts, photos, code, etc.). The content of the
<figure> element should be related to the main content, but should have no impact on document flow if removed.
<figcaption> tag defines the title of the <figure> element.
The<figcaption> element should be placed as the first or last child element of the "figure" element. .
Write a comprehensive example and you will understand after comparing it:
<!doctype html> <html> <head> <meta charset="UTF-8"> <title>语义元素</title> </head> <body> <!--结构元素--> <header>头部</header> <section>表示一个段落：用于区域的章节表述</section> <footer>区域的页脚部分</footer> <nav>菜单 导航</nav> <article>表示文章的主体内容</article> <!--块级元素 用于区域的划分--> <aside></aside> <figure> <figcaption></figcaption> </figure> <code>表示一段代码</code> <dialog>表示对话 <dt>说话的人</dt><dd>内容</dd> </dialog> <!--语义元素--> <mtter>一定范围的数值</mtter> <time></time> <progress>进度条</progress> <video>视频</video> <audio>音频</audio> <!--交互元素--> <details>一段具体内容 通过某个方法显示</details> <datagrid>用来控制客户端数据显示</datagrid> <menu>动态交互菜单</menu> <command>命名</command> <!--显示文章案例--> <article> <header> <h1>HTML head 头部分的标签</h1> <time>2015年12月12日</time> </header> <p>HTML head 头部分的标签、元素有很多，涉及到浏览器对网页的渲染，SEO等等，而各个浏览器内核以及各个国内浏览器厂商都有些自己的标签元素,这就造成了很多差异性。移动互联网时代，head 头部结构，移动端的meta 元素，显得更为重要。了解每个标签的意义，写出满足自己需求的head 头标签，是本文的目的。本篇以一丝的文章为基础，进行扩展总结介绍常用的head中各个标签、元素的意义以及使用场景。</p> <footer> <p>http://www.baidu.com</p> </footer> </article> <!--评论--> <section> <h2>评论</h2> <article> <header> <h3>张帅</h3> <p><time pubdata datatime="2013-09-23 10:00 - 11:00">一小时前</time></p> </header> <p>评论内容</p> </article> <article> <header> <h3>张帅</h3> <p><time pubdata datatime="2013-09-23 10:00 - 11:00">一小时前</time></p> </header> <p>评论内容</p> </article> </section> </body> </html>
