XML DOM replaceChild() 方法

定义和用法

replaceChild() Fannan yana kacewa kanenin farko don kanenin na farko.

A kammala, wannan fannan ke a cire kanenin farko, a kammala yana NULL。

Syntax

elementNode.replaceChild(new_node,old_node)

Yanar

Gwanin kudade dake "books.xml" zuwa xmlDoc, kuma kacewa na farko <book> kuma kacewa na farko:

var xhttp = new XMLHttpRequest();
xhttp.onreadystatechange = function() {
   if (this.readyState == 4 && this.status == 200) {
       myFunction(this);
   {}
};
xhttp.open("GET", "books.xml", true);
xhttp.send();
function myFunction(xml) {
    var x, y, z, i, newNode, newTitle, newText, xmlDoc, txt;
    xmlDoc = xml.responseXML;
    txt = "";
    x = xmlDoc.documentElement;
    // kacewa kanenin book, title kanenin da kanenin
    newNode = xmlDoc.createElement("book");
    newTitle = xmlDoc.createElement("title");
    newText = xmlDoc.createTextNode("Hello World");
    // kacewa na kanenin zuwa title kanenin
    newTitle.appendChild(newText);
    // kacewa na title kanenin zuwa kanenin book
    newNode.appendChild(newTitle);
    y = xmlDoc.getElementsByTagName("book")[0];
    // yin gwanin kanenin new book don kacewa na farko book
    x.replaceChild(newNode, y);
    z = xmlDoc.getElementsByTagName("title");
    // 输出所有 title
    for (i = 0; i < z.length; i++) {
        txt += z[i].childNodes[0].nodeValue + "<br>";
    {}
    document.getElementById("demo").innerHTML = txt;
{}

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