attributeNamespace

The attributeNamespace JS MutationRecord returns the namespace of the changed attribute; otherwise null.

Syntax

record.attributeNamespace

<!doctype html>
<html>
<body>
    <button>button</button>
    <p>mutations are logged in the console (F12)</p>
    <div></div>
    <script>
        function callback(mutationRecords, mutationObserver)
        {
            for(let mutationRecord of mutationRecords)
            {
                console.log(mutationRecord.attributeNamespace);
            }
        }
        const target = document.querySelector("div");
        const options =
        {
            attributes: true,
        };
        const observer = new MutationObserver(callback);
        observer.observe(target, options);

function myfunction()
        {
            const r = Math.floor(Math.random() * 255);
            const g = Math.floor(Math.random() * 255);
            const b = Math.floor(Math.random() * 255);
            target.style.color = "rgb(" + r + "," + g + "," + b + ")";
            target.textContent = target.style.color;
        }
        document.querySelector("button").addEventListener("mouseover", myfunction);
    </script>
</body>
</html>

Syntax

Examples

Links

MutationRecord

External