Node.isSameNode()

The isSameNode() method for Node objects tests whether two nodes are the same (that is, whether they reference the same object).

const isSameNode = node.isSameNode(otherNode)

• otherNode The Node to test against.

In this example, we create three <div> blocks. The first and third have the same contents and attributes, while the second is different. Then we run some JavaScript to compare the nodes using isSameNode() and output the results.

HTML

<div>This is the first element.</div>
<div>This is the second element.</div>
<div>This is the first element.</div>

<p id="output"></p>

let output = document.getElementById("output");
let divList  = document.getElementsByTagName("div");

output.innerHTML += "div 0 same as div 0: " + divList[0].isSameNode(divList[0]) + "<br/>";
output.innerHTML += "div 0 same as div 1: " + divList[0].isSameNode(divList[1]) + "<br/>";
output.innerHTML += "div 0 same as div 2: " + divList[0].isSameNode(divList[2]) + "<br/>";

• Node.isEqualNode()