HTML | DOM contains() Method
The contains() method is used to find whether the specified node is a descendant of the given node. This descendant can be a child, grandchild, great-grandchild, and so on.
Syntax:
node.contains( otherNode )
Parameters: The “othernode” in the syntax is the parameter required in this function.
Return Value: It returns true if node is descendant of the given node else false.
Example:
HTML
<!DOCTYPE html><html><head> <title>HTML | DOM contains() Method</title> <!--script to check, if a node contains descendant--> <script> function containchild() { var span = document.getElementById("sp1"); var div = document.getElementById("para1").contains(span); document.getElementById("result").innerHTML = div; } </script></head><body> <center> <h1 style="color:green"> Welcome to GeeksforGeeks</h1></center> <div id="para1"> <p>Social media is not about the <span id="sp1">exploitation of technology</span> but service to community.</p> </div> <p>Click the button to find out if the div element contains a span element.</p> <button onclick="containchild()">Check</button> <!--for displaying boolean value --> <p id="result"></p></body></html> |
Output:
Before clicking on the check button:
After clicking on the check button:
Supported Browsers: The browser supported by DOM contain() Method are listed below:
- Google Chrome 16 and above
- Edge 12 and above
- Internet Explorer 9 and above
- Firefox 9 and above
- Opera 7 and above
- Safari 1.1 and above
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