Browser Compatibility Testing of Case-insensitive CSS attribute selectors

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Case-insensitive CSS attribute selectors
Case-insensitive CSS attribute selectors

Case-insensitive CSS attribute selectors

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BROWSER SUPPORT FOR Case-insensitive CSS attribute selectors

Google Chrome

Case-insensitive CSS attribute selectors element is not supported by Chrome version 4 to 48. This property is supported by Chrome 49 to 67.

Mozilla Firefox

This element is not supported by Mozilla Firefox browser version 2 to 46. Firefox 47 to 60 supports Case-insensitive CSS attribute selectors.

Internet Explorer

IE browser doesn't support Case-insensitive CSS attribute selectors.


Safari browser version 3.1 to 8 doesn't support case-insensitive css attribute selector.

Microsoft Edge

Microsoft Edge browser doesn't support this property at all.


Early Opera browser versions from 10.1 to 35 doesn't support Case-insensitive CSS attribute selectors at all. It is fully supported by Opera version 36 - 53.

Information sourced from

"Can I use" provides up-to-date browser support tables for support of front-end web technologies on desktop and mobile web browsers.

  • Google Chrome
  • Mozilla
  • Edge
  • IE
  • opera
  • Safari
  • Yandex

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