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Summary
hasAttributeNS returns a boolean value indicating whether the current element has the specified attribute.
Syntax
result = element.hasAttributeNS( namespace, localName)
resultis the boolean valuetrueorfalse.namespaceis a string specifying the namespace of the attribute.localNameis the name of the attribute.
Example
// check that the attribute exists
// before you set a value
var d = document.getElementById("div1");
if (d.hasAttributeNS(
"https://www.mozilla.org/ns/specialspace/",
"special-align")) {
d.setAttribute("align", "center");
}
Notes
DOM methods dealing with element's attributes:
| Not namespace-aware, most commonly used methods | Namespace-aware variants (DOM Level 2) | DOM Level 1 methods for dealing with Attr nodes directly (seldom used) |
DOM Level 2 namespace-aware methods for dealing with Attr nodes directly (seldom used) |
|---|---|---|---|
setAttribute (DOM 1) |
setAttributeNS |
setAttributeNode |
setAttributeNodeNS |
getAttribute (DOM 1) |
getAttributeNS |
getAttributeNode |
getAttributeNodeNS |
hasAttribute (DOM 2) |
hasAttributeNS |
- | - |
removeAttribute (DOM 1) |
removeAttributeNS |
removeAttributeNode |
- |