HTML5 Browser Support
HTML5 Browser Support （HTML5浏览器支持）
All the modern browsers support HTML5, automatically handling the unknown elements as inline elements. furthermore, it’s possible to “teach” the older browsers to handle such kinds of elements. （所有现代浏览器都支持HTML5 ，自动将未知元素作为内联元素处理。此外，还可以“教”旧浏览器处理此类元素。）
Semantic Elements as Block Elements
Semantic Elements as Block Elements （语义元素作为块元素）
HTML5 specifies eight new semantic elements, and all of them are block-level elements. Here they are:
HTML <header> tag
HTML <section> tag
HTML <footer> tag
HTML <aside> tag
HTML <nav> tag
HTML <main> tag
HTML <article> tag
HTML <figure> tag
Set the CSS display property for the elements mentioned above, to ensure proper behavior in older browsers. （为上述元素设置CSS display属性，以确保在较旧的浏览器中正常运行。）
HTML5Shiv
HTML5Shiv
The HTML5Shiv is placed inside of the <head> tag. It is a javascript file. It is referenced in a <script> tag.
You should use the HTML5Shiv while using the new HTML5 elements. （使用新的HTML5元素时，应使用HTML5Shiv。）
Example of the HTML5Shiv:
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<!--[if lt IE 9]>
<script src="https://oss.maxcdn.com/libs/html5shiv/3.7.0/html5shiv.js"></script>
<![endif]-->
</head>
<body>
<section>
<h1>The most beautiful places in the world</h1>
<article>
<h2>Salar de Uyuni, Bolivia</h2>
<p>The world's largest salt flats, spanning 4086 miles (10,582 sq. km), Salar de Uyuni is unlike anywhere else on earth.</p>
</article>
<article>
<h2>Moraine Lake, Canada</h2>
<p>Moraine Lake may only only half the size of its nearby neighbour Lake Louise, but it's even more scenic.</p>
</article>
<article>
<h2>Iguazu Falls, Argentina/Brazil border</h2>
<p>One of the modern natural wonders of the world, this chain of mini waterfalls is one of the planet's most awe-inspiring sights.</p>
</article>
</section>
</body>
</html>