HTML DOM Element attributes
Examples
How many attributes does the <img> element have:
let numb = document.getElementById("myImg").attributes.length;
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Display all attributes of an <img> element:
const nodeMap = document.getElementById("myImg").attributes;
let text = "";
for (let i = 0; i < nodeMap.length; i++) {
text += nodeMap[i].name + " = " + nodeMap[i].value + "<br>";
}
document.getElementById("demo").innerHTML = text;
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More examples below.
Definition and Usage
The attributes property returns a collection of attributes in an element.
The attributes property returns a NamedNodeMap.
NamedNodeMap
A NamedNodeMap is an array-like unordered collection of an element's attributes.
In other words: a NamedNodeMap is a list of Attr objects.
A NamedNodeMap has a length property that returns the number of nodes.
The nodes can be accessed by name or index numbes. The index starts at 0.
See Also:
Syntax
node.attributes
Return Value
| Type | Description |
| NamedNodeMap | A collection of attribute objects. |
More Examples
How many attributes does the <button> element have:
let numb = document.getElementById("myButton").attributes.length;
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Get the name of a <button> element's second (index 1) attribute:
let attr = document.getElementById("myBtn").attributes[1].name;
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Browser Support
element.attributes is a DOM Level 1 (1998) feature.
It is fully supported in all browsers:
| Chrome | IE | Edge | Firefox | Safari | Opera |
| Yes | 9-11 | Yes | Yes | Yes | Yes |
