JavaScript node.insertBefore() Method
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JavaScript node.insertBefore() Method
The node.insertBefore() method inserts a new node before the reference node (specified node).
Note: If the given node already exists in the document, insertBefore() moves it from its current position to the new position.
Example
HTML Online Editor
<!DOCTYPE html>
<html>
<body>
<p id="point">End</p>
<script>
var parentNode = document.getElementsByTagName("body")[0];
var refNode = document.getElementById("point");
var newNode = document.createElement("p");
var textnode = document.createTextNode("Start");
newNode.appendChild(textnode);
parentNode.insertBefore(newNode, refNode);
</script>
</body>
</html>
Syntax
node.insertBefore(newNode, refNode)
Parameter Values
| Value | Type | Explanation |
|---|---|---|
| newNode | Required | The node to be inserted. |
| refNode | Required | The node before which newNode is inserted. |
More Examples
Example
HTML Online Editor
<!DOCTYPE html>
<html>
<body>
<ol><li>Apple</li></ol>
<button onclick="myFunction()">Add Mango</button>
<script>
var parentNode = document.getElementsByTagName("ol")[0];
function myFunction(){
var newNode = document.createElement("li");
var textnode = document.createTextNode("Mango");
newNode.appendChild(textnode);
parentNode.insertBefore(newNode, parentNode.childNodes[0]);
}
</script>
</body>
</html>
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