若干个HTML5的新特性与技术
1. 新的Doctype
尽管使用,即使浏览器不懂这句话也会按照标准模式去渲染
2. Figure元素
用
<figure> <img src="/static/imghw/default1.png" data-src="path/to/image" class="lazy" alt="About image"> <figcaption> </figcaption></figure>Copy after login<p>This is an image of something interesting. </p>Copy after loginCopy after login
3. 重新定义的
已经被重新定义了,现在被用来表示小的排版,如网站底部的版权声明
4. 去掉link和script标签里面的type属性
5. 加/不加 括号
HTML5没有严格的要求属性必须加引号,闭合不闭合,但是建议加上引号和闭合标签
6. 让你的内容可编辑,只需要加一个contenteditable属性
7. Email Inputs
如果我们给Input的type设置为email,浏览器就会验证这个输入是否是email类型,当然不能只依赖前端的校验,后端也得有相应的校验
8. Placeholders
这个input属性的意义就是不必通过javascript来做placeholder的效果了
9. Local Storage
使用Local Storage可以永久存储大的数据片段在客户端(除非主动删除),目前大部分浏览器已经支持,在使用之前可以检测一下window.localStorage是否存在
10. 语义化的header和footer
11. 更多的HTML5表单特性
12. IE和HTML5
默认的,HTML5新元素被以inline的方式渲染,不过可以通过下面这种方式让
其以block方式渲染
header, footer, article, section, nav, menu, hgroup {
display: block;
}
不幸的是IE会忽略这些样式,可以像下面这样fix:
document.createElement("article"); document.createElement("footer");Copy after logindocument.createElement("header"); document.createElement("hgroup");Copy after logindocument.createElement("nav"); document.createElement("menu");Copy after login
13. hgroup
一般在header里面用来将一组标题组合在一起,如
<header> <hgroup> <h1 id="Recall-Fan-Page"> Recall Fan Page </h1> </hgroup></header>Copy after login<h2 id="Only-for-people-who-want-the-memory-of-a-lifetime"> Only for people who want the memory of a lifetime. </h2>Copy after login
14. Required属性
required属性定义了一个input是否是必须的,你可以像下面这样声明
或者
15. Autofocus属性
正如它的词义,就是聚焦到输入框里面
16. Audio支持
HTML5提供了
<audio autoplay="autoplay" controls="controls"> </audio>Copy after login<source src="file.ogg"></source><!--FF--> <source src="file.mp3"></source>Copy after login

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