XML DOM replaceChild() Method
Element Object
Example
The following code fragment loads "books.xml" into xmlDoc and replaces the first <book> element:
var xhttp = new XMLHttpRequest();
xhttp.onreadystatechange = function() {
��� if (xhttp.readyState == 4 && xhttp.status == 200) {
������� myFunction(xhttp);
��� }
};
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;
// Create a book
element, title element and a text node
newNode = xmlDoc.createElement("book");
newTitle = xmlDoc.createElement("title");
newText = xmlDoc.createTextNode("A
Notebook");
// Add a text node to the title node
newTitle.appendChild(newText);
// Add the title node to the book node
newNode.appendChild(newTitle);
y = xmlDoc.getElementsByTagName("book")[0];
// Replace the first book node with the new book node
x.replaceChild(newNode,
y);
z = xmlDoc.getElementsByTagName("title");
// Output all titles
for (i = 0; i < z.length; i++) {
txt += z[i].childNodes[0].nodeValue
+ "<br>";
}
document.getElementById("demo").innerHTML = txt;
}
The output of the code above will be:
A Notebook
Harry Potter
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Definition and Usage
The replaceChild() method replaces a child node with another.
This function returns the replaced node on success, or NULL on failure.
Syntax
elementNode.replaceChild(new_node,old_node)
| Parameter | Description |
|---|---|
| new_node | Required. Specifies the new node |
| old_node | Required. Specifies the child node to replace |
Element Object
