转自：http://www.cnblogs.com/wintersun/archive/2012/04/09/2438646.html
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
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
<!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.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。