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HomeWeb Front-endJS TutorialJS Attribute属性操作详解_基础知识

Attribute是属性的意思,文章仅对部分兼容IE和FF的Attribute相关的介绍。

attributes:获取一个属性作为对象

getAttribute:获取某一个属性的值

setAttribute:建立一个属性,并同时给属性捆绑一个值

createAttribute:仅建立一个属性

removeAttribute:删除一个属性

getAttributeNode:获取一个节点作为对象

setAttributeNode:建立一个节点

removeAttributeNode:删除一个节点

attributes可以获取一个对象中的一个属性,并且作为对象来调用,注意在这里要使用“[]”,IE在这里可以使用“()”,考虑到兼容性的问题,要使用“[]”。关于attributes属性的使用方式上,IE和FF有巨大的分歧,在此不多介绍。

attributes的使用方法:(IE和FF通用)

<body>
<div id = "t"><input type = "hidden" id = "sss" value = "aaa"></div>
</body>
<script>
var d = document.getElementById("sss").attributes["value"];
document.write(d.name);
document.write(d.value);
//显示value aaa
</script>

getAttribute,setAttribute,createAttribute,removeAttribute四兄弟的概念比较容易理解,使用方法也比较简单,唯一需要注意这几点:

1、createAttribute在使用的时候不需要基于对象的,document.createAttribute()就可以。

2、setAttribute,createAttribute在使用的时候不要使用name,type,value等单词,IE和FF的反应都奇怪的难以理解。

3、createAttribute在使用的时候如果只定义了名字,没有d.nodeValue = "hello";语句定义值,FF会认为是一个空字符串,IE认为是undefined,注意到这点就可以了。

getAttribute的使用方法:

<body>
<div id = "t"><input type = "hidden" id = "sss" value = "aaa"></div>
</body>
<script>
var d = document.getElementById("sss").getAttribute("value");
document.write(d);
//显示 aaa
</script>

setAttribute的使用方法:(你会发现多了一个名为good的属性hello)

<body>
<div id = "t"><input type = "hidden" id = "sss" value = "aaa"></div>
</body>
<script>
var d = document.getElementById("sss").setAttribute("good","hello");
alert(document.getElementById("t").innerHTML)
</script>

createAttribute的使用方法:(多了一个名为good的空属性)

<head>
    <meta charset="UTF-8">
    <title></title>
    <script>
      window.onload = function (){
        var oBox = document.getElementById('box');
        alert( document.body.innerHTML );
        oBox.setAttribute('value','name');
        alert( document.body.innerHTML );
        attr = document.createAttribute('hallo');
        alert( document.body.innerHTML );/*同上*/
        attr.nodeValue = 'world';/*对自定义属性进行编辑*/
        alert( document.body.innerHTML );/*同上*/
        oBox.setAttributeNode(attr);/*对标签插入自定义属性*/
        alert( document.body.innerHTML );/*改变*/
      };
    </script>
  </head>
  <body>
    <ul id="box">
    </ul>
  </body>

removeAttribute的使用方法:(少了一个)

<body>
<div id = "t"><input type = "hidden" id = "sss" value = "aaa"></div>
</body>
<script>
var d = document.getElementById("sss").removeAttribute("value");
alert(document.getElementById("t").innerHTML)
</script>

getAttributeNode,setAttributeNode,removeAttributeNode三个方法的特点是都直接操作一个node(节点),removeAttributeNode在一开始的时候总会用错,但是充分理解了node的含义的时候,就能够应用自如了。

getAttributeNode的使用方法:

<body>
<div id = "t"><input type = "hidden" id = "sss" value = "aaa"></div>
</body>
<script>
var d = document.getElementById("sss").getAttributeNode("value"); 
document.write(d.name);
document.write(d.value);
//显示 value aaa
</script>

setAttributeNode的使用方法:

<body>
<div id = "t"><input type = "hidden" id = "sss" value = "aaa"></div>
</body>
<script>
var d = document.createAttribute("good");
document.getElementById("sss").setAttributeNode(d);
alert(document.getElementById("t").innerHTML);
</script>

removeAttributeNode的使用方法:

<body>
<div id = "t"><input type = "hidden" id = "sss" value = "aaa"></div>
</body>
<script>
var d = document.getElementById("sss").getAttributeNode("value")
document.getElementById("sss").removeAttributeNode(d); 
alert(document.getElementById("t").innerHTML);
</script>
更多的关于attributes属必性问题,可在w3school中查询!

以上这篇JS Attribute属性操作详解就是小编分享给大家的全部内容了,希望能给大家一个参考,也希望大家多多支持脚本之家。

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