Element.hasAttributeNS()
Summary
hasAttributeNS
returns a boolean value indicating whether the current element has the specified attribute.
Syntax
JavaScript
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result = element.hasAttributeNS( namespace, localName)
result
is the boolean valuetrue
orfalse
.namespace
is a string specifying the namespace of the attribute.localName
is the name of the attribute.
Example
JavaScript
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// check that the attribute exists // before you set a value var d = document.getElementById("div1"); if (d.hasAttributeNS( "http://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 |
- |
Specification
DOM Level 2 Core: hasAttributeNS
License
© 2016 Mozilla Contributors
Licensed under the Creative Commons Attribution-ShareAlike License v2.5 or later.
https://developer.mozilla.org/en-us/docs/web/api/element/hasattributens