To replace a specified node, we can use the replaceChild() method, while text in a text node can be replaced by the nodeValue property.
Replace an Element Node:
Replacing a node is possible with the replaceChild() method.
Books.xml:
ABC Author Name 2020 100.00 XQuery Book Author 1 Author 2 Author 3 Author 4 2005 350.00
Example:
Explanation:
In the above example, we are replacing the first <book> element, for which we are loading “books.xml” in the xmlDoc. After creating a new element node <book>, a new element node <title>, and a new text node with the text “A Notebook”, we will append the new text node to the new element node <title>, the new element node <title> to the new element node <book> and will replace the first <book> element node with the new <book> element node.
Replace Data In a Text Node:
We can replace data in a text node using the replaceData() method having three parameters:
- offset – It is used to specify the value to begin replacing characters. Its value starts at zero.
- length – It is used to specify the number of characters to replace.
- string – It is used to specify the string to insert.
Example:
Explanation:
In the above example, we are loading “books.xml” in the xmlDoc to get the text node of the first <title> element node. We are then replacing the eight first characters from the text node using the replaceData method.
Use of nodeValue Property:
Using the nodeValue property, we can easily replace the data in a text node.
Example:
Explanation:
In the above example, we will replace the text node value in the first <title> element. We will first load “books.xml” in the xmlDoc to get the text node of the first <title> element node. We will then change the text of the text node using the nodeValue property.
