DOM - 节点对象方法 - normalize

方法 normalize 添加所有文本节点，包括属性节点，该节点定义了一种标准形式，其中包含元素、注释、处理指令、CDATA 部分和实体引用的节点结构将文本节点分开，即既不是相邻的文本节点也不是空的文本节点。

语法

以下是使用 normalize 方法的语法。

nodeobject.normalize();

此方法没有参数，也没有返回值。

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 normalize 方法的用法 −

<!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.createElement('Employee');
         x.appendChild( document.createTextNode("EmployeeA ") );
         x.appendChild( document.createTextNode("EmployeeB ") );

         document.write("<b>Before normalize</b><br>");
         document.write("<b>Child node length: </b>"+x.childNodes.length+"<br>");
         document.write("<b>First child node: </b>"+x.childNodes[0].textContent+"<br>");
         document.write("<b>Second child node: </b>"+x.childNodes[1].textContent+"<br>");

         x.normalize();
         document.write("<b>After normalize</b><br>");
         document.write("<b>Child node length: </b>"+x.childNodes.length+"<br>");
         document.write("<b>First child node: </b>"+x.childNodes[0].textContent+"<br>");
      </script>
   </body>
</html>

执行

将此文件另存为服务器路径上的nodemethod_normalise.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 −

Before normalize
Child node length: 2
First child node: EmployeeA
Second child node: EmployeeB
After normalize
Child node length: 1
First child node: EmployeeA EmployeeB