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:optional CSS pseudo-class

The :optional pseudo class matches form inputs that do not have a :required attribute.

Last updated on : 2026-02-09

Browser Versions

IE

Edge

Firefox

Chrome

Safari

Opera

5.5 - 9

10 - 11

12 - 144

2 - 3

4 - 150

15 - 147

3.2 - 4

5.1 - 26.3

10.6 - 12

15 - 125

Fully Supported

Partially

No Support

Specifications

HTML Standard # selector-optional Selectors Level 4 # opt-pseudos

Syntax

:optional

Browser Compatibility

:optional CSS pseudo-class on IE is fully supported on 10-11, and not supported on 5.5-9 IE versions.

:optional CSS pseudo-class on Edge is fully supported on all Edge versions.

:optional CSS pseudo-class on Firefox is fully supported on 4-150, and not supported on 2-3 Firefox versions.

:optional CSS pseudo-class on Chrome is fully supported on all Chrome versions.

:optional CSS pseudo-class on Safari is fully supported on 5.1-26.3, and not supported on 3.2-4 Safari versions.

:optional CSS pseudo-class on Opera is fully supported on 15-125 and partially supported on 10.6-12 Opera versions.

:optional CSS pseudo-class on Safari on iOS is fully supported on 5-26.3, and not supported on 3.2-4 Safari on iOS versions.

:optional CSS pseudo-class on Android Browser is fully supported on all Android Browser versions.

:optional CSS pseudo-class on Opera Mobile is fully supported on 64-80 and partially supported on 10-12 Opera Mobile versions.

:optional CSS pseudo-class on Chrome for Android is fully supported on all Chrome for Android versions.

:optional CSS pseudo-class on Firefox for Android is fully supported on all Firefox for Android versions.

:optional CSS pseudo-class on Samsung Internet is fully supported on all Samsung Internet versions.

Browser Support for :optional CSS pseudo-class

:optional CSS pseudo-class on Chrome

:optional CSS pseudo-class on Safari

:optional CSS pseudo-class on Firefox

:optional CSS pseudo-class on Internet Explorer

:optional CSS pseudo-class on Opera

:optional CSS pseudo-class on Edge

References

Data sourced from

97

High

Overall Browser Compatibility Score

Note::optional CSS pseudo-class shows a browser compatibility score of 97. This is a collective score out of 100 to represent browser support of a web technology. The higher this score is, the greater is the browser compatibility. The browser compatibility score is not a 100% reflection for every browser and the web technology support. However, it does give you an estimate on how much you should rely on a particular web technology in terms of browser compatibility.

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