您可以帮助老版本浏览器处理 HTML5。
所有现代浏览器都支持 HTML5。 此外,所有浏览器,不论新旧,都会自动把未识别元素当做行内元素来处理。 正因如此,您可以帮助老式浏览器处理”未知的“ HTML 元素。 注释:您甚至可以教授石器时代的 IE6 如何处理未知的 HTML 元素。
HTML5 定义了八个新的语义 HTML 元素。所有都是块级元素。 您可以把 CSS display 属性设置为 block
您可以通过浏览器 trick 向 HTML 添加任何新元素: 本例向 HTML 添加了一个名为 <myHero>:的新元素,并为其定义 display 样式:
<!DOCTYPE html> <html> <head> <title>Creating an HTML Element</title> <script>document.createElement("myHero")</script> <style> myHero { display: block; background-color: #ddd; padding: 50px; font-size: 30px; } </style> </head> <body> <h1>My First Heading</h1> <p>My first paragraph.</p> <myHero>My First Hero</myHero> </body> </html>
<!DOCTYPE html> <html> <head> <title>Styling HTML5</title> <!--[if lt IE 9]> <script src="http://html5shiv.googlecode.com/svn/trunk/html5.js"></script> <![endif]--> </head> <body> <h1>My First Article</h1> <article> London is the capital city of England. It is the most populous city in the United Kingdom, with a metropolitan area of over 13 million inhabitants. </article> </body> </html>
<!DOCTYPE html> <html lang="en"> <head> <title>HTML5 Skeleton</title> <meta charset="utf-8"> <!--[if lt IE 9]> <script src="http://html5shiv.googlecode.com/svn/trunk/html5.js"> </script> <![endif]--> <style> body {font-family: Verdana, sans-serif; font-size:0.8em;} header,nav, section,article,footer {border:1px solid grey; margin:5px; padding:8px;} nav ul {margin:0; padding:0;} nav ul li {display:inline; margin:5px;} </style> </head> <body> <header> <h1>HTML5 SKeleton</h1> </header> <nav> <ul> <li><a href="html5_semantic_elements.asp">HTML5 Semantic</a></li> <li><a href="html5_geolocation.asp">HTML5 Geolocation</a></li> <li><a href="html5_canvas.asp">HTML5 Graphics</a></li> </ul> </nav> <section> <h1>Famous Cities</h1> <article> <h2>London</h2> <p>London is the capital city of England. It is the most populous city in the United Kingdom, with a metropolitan area of over 13 million inhabitants.</p> </article> <article> <h2>Paris</h2> <p>Paris is the capital and most populous city of France.</p> </article> <article> <h2>Tokyo</h2> <p>Tokyo is the capital of Japan, the center of the Greater Tokyo Area, and the most populous metropolitan area in the world.</p> </article> </section> <footer> <p>© 2014 W3Schools. All rights reserved.</p> </footer> </body> </html>
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