Html 5中自定义data-*特性

Html 5中支持用户自定义的data-*特性，它们在UI是不可见的。例如data-length,它可以附加在input的标签上。更加具体信息可参考W3C Html 5 data-说明书http://www.w3.org/TR/2012/WD-html5-20120329/global-attributes.html#attr-data

有这么一段描述:

Custom data attributes are intended to store custom data private to the page or application, for which there are no more appropriate attributes or elements.

接下来我们就可以实现这样一个简单例子:

<!DOCTYPE html>
<html>
<head>
    <title>Html5 custom data attribute Test</title>
</head>
<body >
   <li class="user" data-name="Peter Liu" data-city="ShangHai"
      data-lang="CSharp" data-food="apple">
   <b>Peter says:</b> <span>Hello, how are you?</span>
</li>
<script type="text/javascript">
     var user = document.getElementsByTagName("li")[0];
     var pos = 0, span = user.getElementsByTagName("span")[0];

     var phrases = [
   { name: "city", prefix: "I am from " },
   { name: "food", prefix: "I like to eat " },
   { name: "lang", prefix: "I like to program in " }
];

     user.addEventListener("click", function () {
         var phrase = phrases[pos++];
         // Use the .dataset property
         span.innerHTML = phrase.prefix + user.dataset[phrase.name];
     }, false);

</script>
</body>
</html>

上面的li标签中嵌入一些data-*特性，当你点击那个span，读取了每个data-*的value, 最后实现一个切换文字效果。你有注意到上面js中有用到一个dataset属性。W3C官方也是有关于dataset的介绍。上面的代码测试通过在 Firefox 11.0, Chrome 18.0.1025.151
注意这个在IE9是不支持的。 IE9 需要改写为getAttribute

     var phrases = [
   { name: "city", prefix: "I am from " },
   { name: "food", prefix: "I like to eat " },
   { name: "lang", prefix: "I like to program in " }
];

     user.addEventListener("click", function () {
         var phrase = phrases[pos++];
         // Use the .dataset property
         span.innerHTML = phrase.prefix + user.getAttribute('data-'+phrase.name);
     }, false);

</script>
</body>
</html>

上面的代码在IE 9.0.8112测试通过。您也可以在IE, FF中单步调试js看其中结果

希望对您Web开发有帮助。

作者：Petter Liu

补充：web前端 , HTML 5 ,