XML DOM Add Nodes
Examples
The examples below use the XML file books.xml.
A function, loadXMLDoc(), in an external JavaScript is used to load the XML file.
Add a node after the last child node
This example uses appendChild() to add a child node to an existing node.
Add a node before a specified child node
This example uses insertBefore() to insert a node before a specified child node.
Add a new attribute
This example uses the setAttribute() method to add a new attribute.
Add data to a text node
This example uses insertData() to insert data into an existing text node.
Add a Node - appendChild()
The appendChild() method adds a child node to an existing node.
The new node is added (appended) after any existing child nodes.
Note: Use insertBefore() if the position of the node is important.
The following code fragment creates an element (<edition>), and adds it after the last child of the first <book> element:
Example
xmlDoc=loadXMLDoc("books.xml");
newel=xmlDoc.createElement("edition");
x=xmlDoc.getElementsByTagName("book")[0];
x.appendChild(newel);
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Try it yourself »
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Example explained:
- Load "books.xml"
into xmlDoc using loadXMLDoc()
- Create a new node <edition>
- Append the node to the first <book> element
Loop through and append an element to all <book> elements:Try it yourself
Insert a Node - insertBefore()
The insertBefore() method is used to insert a node before a specified child node.
This method is useful when the position of the added node is important:
Example
xmlDoc=loadXMLDoc("books.xml");
newNode=xmlDoc.createElement("book");
x=xmlDoc.documentElement;
y=xmlDoc.getElementsByTagName("book")[3];
x.insertBefore(newNode,y);
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Try it yourself »
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Example explained:
- Load "books.xml"
into xmlDoc using loadXMLDoc()
- Create a new element node <book>
- Insert the new node in front of the last <book> element node
If the second parameter of insertBefore() is null, the new node will be added
after the last existing child node.
x.insertBefore(newNode,null) and x.appendChild(newNode) will
both append a new child node to x.
Add a New Attribute
There is no method called addAtribute().
The setAttribute() method creates a new attribute if the attribute does
not exist:
Example
xmlDoc=loadXMLDoc("books.xml");
x=xmlDoc.getElementsByTagName('book');
x[0].setAttribute("edition","first");
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Try it yourself »
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Example explained:
- Load "books.xml"
into xmlDoc using loadXMLDoc()
- Set (create) the attribute "edition" with the value "first"
for the first <book> element
Note: If the attribute already exists, the setAttribute()
method will overwrite the existing value.
Add Text to a Text Node - insertData()
The insertData() method inserts data into an existing
text node.
The insertData() method has two parameters:
- offset - Where to begin inserting characters (starts at zero)
- string - The string to insert
The following code fragment will add "Easy" to the text
node of the first
<title>
element of the loaded XML:
Example
xmlDoc=loadXMLDoc("books.xml");
x=xmlDoc.getElementsByTagName("title")[0].childNodes[0];
x.insertData(0,"Easy ");
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Try it yourself »
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