web api instance method
Node: isEqualNode() method
The isEqualNode() method of the Node interface tests whether two nodes are equal.
Two nodes are equal when they have the same type, defining characteristics (for
elements, this would be their ID, number of children, and so forth), its attributes
match, and so on. The specific set of data points that must match varies depending on
the types of the nodes.
Syntax
isEqualNode(otherNode)
Parameters
otherNode- : The
Nodeto compare equality with.[!NOTE] This parameter is not optional, but can be set to
null.
- : The
Return value
A boolean value that is true if the two nodes are equals, or false if not.
If otherNode is null, isEqualNode() always return false.
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 isEqualNode() 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
const output = document.getElementById("output");
const divList = document.getElementsByTagName("div");
output.innerText += `div 0 equals div 0: ${divList[0].isEqualNode(
divList[0],
)}\n`;
output.innerText += `div 0 equals div 1: ${divList[0].isEqualNode(
divList[1],
)}\n`;
output.innerText += `div 0 equals div 2: ${divList[0].isEqualNode(
divList[2],
)}\n`;