DOM - 属性对象属性 - isId
属性 isId 返回该属性是否已知为 ID 类型(即包含其所有者元素的标识符)。
语法
以下是使用 isId 属性的语法。
attrObject.isId
示例
node.xml 内容如下 −
<?xml version = "1.0"?>
<Company>
<Employee category = "Technical">
<FirstName>Tanmay</FirstName>
<LastName>Patil</LastName>
<ContactNo>1234567890</ContactNo>
<Email>tanmaypatil@xyz.com</Email>
</Employee>
<Employee category = "Non-Technical">
<FirstName>Taniya</FirstName>
<LastName>Mishra</LastName>
<ContactNo>1234667898</ContactNo>
<Email>taniyamishra@xyz.com</Email>
</Employee>
<Employee category = "Management">
<FirstName>Tanisha</FirstName>
<LastName>Sharma</LastName>
<ContactNo>1234562350</ContactNo>
<Email>tanishasharma@xyz.com</Email>
</Employee>
</Company>
以下示例演示了 name 属性的用法 −
<!DOCTYPE html>
<html>
<head>
<script>
function loadXMLDoc(filename) {
if (window.XMLHttpRequest) {
xhttp = new XMLHttpRequest();
} else // code for IE5 and IE6 {
xhttp = new ActiveXObject("Microsoft.XMLHTTP");
}
xhttp.open("GET",filename,false);
xhttp.send();
return xhttp.responseXML;
}
</script>
</head>
<body>
<script>
xmlDoc = loadXMLDoc("/dom/node.xml");
x = xmlDoc.getElementsByTagName('Employee');
document.write("Specifies if attribute have the ID specified for its owner element or not : ");
document.write("<br>");
document.write(x.item(0).attributes[0].isId);
</script>
</body>
</html>
执行
将此文件保存为服务器路径上的 domattribute_specified.html(此文件和 node.xml 应位于服务器中的同一路径)。我们将获得如下所示的输出 −
Specifies if attribute have the ID specified for its owner element or not : undefined
dom_attribute_object.htm
