XML DOM replaceChild() method
Definition and usage
replaceChild()
The method replaces the child node with a new node.
The new node can be an existing node in the document or a newly created node.
Tip:The replaced child node can be inserted later into any element in the same document. Please use the insertBefore() or appendChild() method to insert it into the same document later, or use the adoptNode() or importNode() method to insert the replaced node into another document.
Syntax
nodeObject.replaceChild(newchild,oldchild)
Parameters
Parameters | Description |
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newchild | Required. Node object. The new node to be inserted into the child node list. |
oldchild | Required. Node object. The node to be replaced in the child node list. |
Technical details
DOM version: | Core Level 1 Node Object. Modified in DOM Level 3. |
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Rückgabewert: | Node-Objekt. Der ersetzte Knoten (oldchild). |
Beispiel
Das folgende Code fügt "books.xml" in xmlDoc ein und ersetzt den ersten <book>-Knoten:
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; // Ein book-Element, ein title-Element und ein Textknoten werden erstellt newNode = xmlDoc.createElement("book"); newTitle = xmlDoc.createElement("title"); newText = xmlDoc.createTextNode("Hello World"); // Der Textknoten wird zum title-Knoten hinzugefügt newTitle.appendChild(newText); // Der title-Knoten wird zum book-Knoten hinzugefügt newNode.appendChild(newTitle); y = xmlDoc.getElementsByTagName("book")[0]; // Der neue book-Knoten ersetzt den ersten book-Knoten x.replaceChild(newNode, y); z = xmlDoc.getElementsByTagName("title"); // Ausgabe aller Titel for (i = 0; i < z.length; i++) { txt += z[i].childNodes[0].nodeValue + "<br>"; } document.getElementById("demo").innerHTML = txt; }
Browser Support
Chrome | Edge | Firefox | Safari | Opera |
---|---|---|---|---|
Chrome | Edge | Firefox | Safari | Opera |
Support | Support | Support | Support | Support |
All major browsers support replaceChild()
Methods.