tabindex global attribute
- LSSpecifies the focusability of the element and in what order (if any) it should become focused (relative to other elements) when "tabbing" through the document.
Chrome
- 4 - 14: Support unknown
- 15 - 110: Supported
- 111: Supported
- 112 - 114: Supported
Edge
- 12 - 110: Supported
- 111: Supported
Safari
- 3.1 - 5: Support unknown
- 5.1 - 16.2: Supported
- 16.3: Supported
- 16.4 - TP: Supported
Firefox
- 2 - 3.6: Support unknown
- 4 - 110: Supported
- 111: Supported
- 112 - 113: Supported
Opera
- 9: Support unknown
- 9.5 - 94: Supported
- 95: Supported
IE
- 5.5 - 6: Support unknown
- 7 - 10: Supported
- 11: Supported
Chrome for Android
- 111: Supported
Safari on iOS
- 3.2 - 16.2: Supported
- 16.3: Supported
- 16.4: Supported
Samsung Internet
- 4 - 19.0: Support unknown
- 20: Support unknown
Opera Mini
- all: Support unknown
Opera Mobile
- 10 - 12.1: Support unknown
- 73: Supported
UC Browser for Android
- 13.4: Supported
Android Browser
- 2.1 - 4.4.4: Support unknown
- 111: Support unknown
Firefox for Android
- 110: Supported
QQ Browser
- 13.1: Supported
Baidu Browser
- 13.18: Supported
KaiOS Browser
- 2.5: Supported
- 3: Supported
Mac OS X "Full Keyboard Access" refers to setting Keyboard→Shortcuts→Full Keyboard Access to "All controls" in the System Preferences.
"Unknown" support for mobile browsers is due to lacking a method of tabbing through fields.
- Resources:
- MDN Web Docs - tabindex attribute