The class global attribute is a space-separated list of the case-sensitive classes of the element. Classes allow CSS and Javascript to select and access specific elements via the class selectors or functions like the DOM method document.getElementsByClassName.
The source for this interactive example is stored in a GitHub repository. If you'd like to contribute to the interactive examples project, please clone https://github.com/mdn/interactive-examples and send us a pull request.
Though the specification doesn't put requirements on the name of classes, web developers are encouraged to use names that describe the semantic purpose of the element, rather than the presentation of the element. For example, attribute to describe an attribute rather than italics, although an element of this class may be presented by italics. Semantic names remain logical even if the presentation of the page changes.
Specifications
| Specification | Status | Comment |
| HTML Living StandardThe definition of 'class' in that specification. | Living Standard | No change from latest snapshot, HTML 5.1 |
| HTML 5.1The definition of 'class' in that specification. | Recommendation | Snapshot of HTML Living Standard, no change from HTML5 |
| HTML5The definition of 'class' in that specification. | Recommendation | Snapshot of HTML Living Standard. From HTML 4.01 Specification, class is now a true global attribute.
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| HTML 4.01 SpecificationThe definition of 'class' in that specification. | Recommendation | Supported on all elements but <base>, <basefont>, <head>, <html>, <meta>, <param>, <script>, <style>, and <title>.
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Browser compatibility
The compatibility table in this page is generated from structured data. If you'd like to contribute to the data, please check out https://github.com/mdn/browser-compat-data and send us a pull request.
Update compatibility data on GitHub
| Desktop | Mobile | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
class
|
Chrome
Full support Yes |
Edge
Full support 12 |
Firefox
Full support 32 |
IE
Full support Yes |
Opera
Full support Yes |
Safari
Full support Yes |
WebView Android
Full support Yes |
Chrome Android
Full support Yes |
Firefox Android
Full support 32 |
Opera Android
Full support Yes |
Safari iOS
Full support Yes |
Samsung Internet Android
Full support Yes |
Legend
- Full support
- Full support
See also
class by Mozilla Contributors is licensed under CC-BY-SA 2.5.
