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<body><div id="box" kerwin="hello"> hello </div><input type="text" value="111111" id="username"><input type="checkbox" checked="checked" id="rember"><img src="" alt="" id="photo"><ul><li>111111</li><li>222222</li> <li>333333</li></ul><!-- 自定义标签data- --><div id="box2" data-kerwin="hello" data-tiechui="hello2" data-xiaoming="hello3"></div><script>// 自定义属性// 设置属性box.setAttribute("tiechui","111111111")// 获取属性 console.log(box.getAttribute("tiechui"))// 删除属性box.removeAttribute("tiechui")box.removeAttribute("kerwin")// var oitems = document.getElementsByTagName("li")// for(var i=0;i<oitems.length;i++){// oitems[i].setAttribute("kkindex",i)// }// h5 data-自定义属性的特有标签// 获取console.log(box2.dataset)// 设置box2.dataset.xiaoming = "hello3333"// 删除delete box2.dataset.xiaomingdelete box2.dataset.kerwindelete box2.dataset.tiechuivar oitems = document.getElementsByTagName("li")for(var i=0;i<oitems.length;i++){oitems[i].dataset.index = i}</script>
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