HTML DOM isId Property

Last Updated : 30 Aug, 2024

The isId Property contains a boolean value that returns a true if the Element has an attribute type of ID, otherwise, it returns a false or undefined value. This Property is used for read-only.

Syntax:

attribute.isId

Return Value: It returns a Boolean value i.e. true if the attribute type is ID, else it returns a false.

Example: In this example, we will use isId Property.

html

<!DOCTYPE html>
<html>

<head>
    <title>
        DOM isID property
    </title>
</head>

<body>
    <center>
        <h1 style="color:green;">GeeksforGeeks</h1>
        <h2> DOM isId Property</h2>
        <button onclick="geeks()">Submit</button>
        <p id="sudo"></p>
        <script>
            function geeks() {
                let x = document.getElementById("sudo");
                x.innerHTML = x.attributes[0].isId;
            }
        </script>
    </center>
</body>

</html>

Output:

Supported Browser: No major browser support the DOM isID property.

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