Element.hasAttribute()
The Element.hasAttribute()
method returns a Boolean value indicating whether the specified element has the specified attribute or not.
Syntax
JavaScript
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<var>var result</var> = <var>element</var>.hasAttribute(<var>attName</var>);
result
- holds the return value
true
orfalse
. attName
- is a string representing the name of the attribute.
Example
JavaScript
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// check that the attribute exists before setting a value var d = document.getElementById("div1"); if (d.hasAttribute("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 |
- |
Specifications
Specification | Status | Comment |
---|---|---|
DOM The definition of 'Element.hasAttribute()' in that specification. |
Living Standard | From Document Object Model (DOM) Level 3 Core Specification, moved from Node to Element |
Document Object Model (DOM) Level 3 Core Specification The definition of 'Element.hasAttribute()' in that specification. |
Recommendation | No change from Document Object Model (DOM) Level 2 Core Specification |
Document Object Model (DOM) Level 2 Core Specification The definition of 'Element.hasAttribute()' in that specification. |
Recommendation | Initial definition. |
Browser compatibility
Feature | Chrome | Firefox (Gecko) | Internet Explorer | Opera | Safari |
---|---|---|---|---|---|
Basic support | (Yes) | (Yes) | 8.0 | (Yes) | (Yes) |
Feature | Android | Firefox Mobile (Gecko) | IE Mobile | Opera Mobile | Safari Mobile |
---|---|---|---|---|---|
Basic support | (Yes) | (Yes) | (Yes) | (Yes) | (Yes) |
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/hasattribute