The Element.hasAttribute() method returns a Boolean value indicating whether the specified element has the specified attribute or not.
SyntaxEdit
var result = element.hasAttribute(attName);
result- holds the return value
trueorfalse. attName- is a string representing the name of the attribute.
ExampleEdit
// check that the attribute exists before setting a value
var d = document.getElementById("div1");
if (d.hasAttribute("align")) {
d.setAttribute("align", "center");
}NotesEdit
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 |
- |
SpecificationsEdit
| 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. |