Element: hasAttributeNS() method
The hasAttributeNS()
method of the Element
interface returns a boolean value indicating whether the current element has the specified attribute with the specified namespace.
If you are working with HTML documents and you don't need to specify the requested attribute as being part of a specific namespace, use the hasAttribute()
method instead.
Syntax
js
hasAttributeNS(namespace,localName)
Parameters
namespace
is a string specifying the namespace of the attribute.localName
is the name of the attribute.
Return value
A boolean.
Examples
js
// 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");
}
Specifications
Specification |
---|
DOM Standard # ref-for-dom-element-hasattributens① |
Browser compatibility
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