JavaScript - hasAttributeNS() method

revision: January 5, 2025

Category : element

hasAttributeNS returns a boolean value indicating whether the current element has the specified attribute.

Syntax :

        hasAttributeNS(namespace,localName)
    

Parameters:

namespace : is a string specifying the namespace of the attribute.

localName : is the name of the attribute.

Examples:

            // Check that the attribute exists before you set a value
            const d = document.getElementById("div1");
            if (
              d.hasAttributeNS("http://www.mozilla.org/ns/specialspace/", "special-align")
            ) {
                 d.setAttribute("align", "center");
            }
        

Practical examples