Node.isSameNode()

The isSameNode() method for Node objects is a legacy alias the for the === strict equality operator. That is, it tests whether two nodes are the same (in other words, whether they reference the same object).

There’s no need to use isSameNode(); instead use the === strict equality operator.

Syntax

const isSameNode = node.isSameNode(otherNode)

Parameters

otherNode The Node to test against.

Example

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>

#output {
  width: 440px;
  border: 2px solid black;
  border-radius: 5px;
  padding: 10px;
  margin-top: 20px;
  display: block;
}

JavaScript

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/>";

Results

Specifications

Specification
DOM Standard (DOM) # dom-node-issamenode

Browser compatibility

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