HTML - DOMTokenList supports() Method

Quiz

HTML DOMTokenList supports() method returns boolean value representing whether the token specified in parameter is supported in DOMTokenList or not. This method is used for feature detection.

Syntax

domtokenlist.supports(token);

Parameter

This method accepts a single parameter as listed below.

Parameter	Description
token	It represents the name of token for which you want to check.

Return Value

It returns a boolean value where true represents the tokens which are supported and false if not supported.

Example of HTML DOMTokenList 'supports()' Method

The following examples check if "allow-popups" is supported by iframe element or not.

<!DOCTYPE html>
<html>
<head>
    <title>
        HTML DOMTokenList supports() Method
    </title>
</head>
<body>
    <iframe id="support"></iframe>
    <p>Click below to check.</p>
    <button onclick="fun()">Check</button>
    <p id="token"></p>
    <script>
        function fun() {
            let x = document.getElementById("support")
                .sandbox.supports("allow-popups");
            document.getElementById("token").innerHTML = x;
        }
    </script>
</body>
</html>

Supported Browsers

Method
supports()	Yes 49	Yes 17	Yes 49	Yes 10.1	Yes 36

html_dom.htm

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