Case-insensitive attribute selector

The i identifier in a CSS attribute selector matches attribute values case-insensitively in document languages like XML where attribute values are case-sensitive.

Baseline Status: Achieved Widely Available on Jul 15, 2022 (Cross-browser Newly Available since Jan 15, 2020).

Desktop Browser Engine Support

Google Chrome

49

Supported

Mozilla Firefox

47

Supported

Apple Safari

9

Supported

Microsoft Edge

79

Supported

Mobile Browser Engine Support

Chrome Android

49

Firefox Android

47

Safari iOS

9

Specifications and References

Specification ↗ Can I Use (css-case-insensitive) ↗ Feature XML ↗

MDN Browser Compat Data Keys:

css.selectors.attribute.case_insensitive_modifier ↗