JavaScript built-in: Intl: DateTimeFormat: `DateTimeFormat()` constructor: `options` parameter: `options.fractionalSecondDigits` parameter
IE
- 6 - 10: Not supported
- 11: Not supported
Edge
- 12 - 83: Not supported
- 84 - 123: Supported
- 124: Supported
Firefox
- 2 - 83: Not supported
- 84 - 124: Supported
- 125: Supported
- 126 - 128: Supported
Chrome
- 4 - 83: Not supported
- 84 - 123: Supported
- 124: Supported
- 125 - 127: Supported
Safari
- 3.1 - 14: Not supported
- 14.1 - 17.3: Supported
- 17.4: Supported
- 17.5 - TP: Supported
Opera
- 10 - 69: Not supported
- 70 - 108: Supported
- 109: Supported
Safari on iOS
- 3.2 - 14.4: Not supported
- 14.5 - 17.3: Supported
- 17.4: Supported
- 17.5: Supported
Opera Mini
- all: Support unknown
Android Browser
- 2.1 - 4.4.4: Not supported
- 124: Supported
Opera Mobile
- 12 - 12.1: Not supported
- 80: Supported
Chrome for Android
- 124: Supported
Firefox for Android
- 125: Supported
UC Browser for Android
- 15.5: Support unknown
Samsung Internet
- 4 - 13.0: Not supported
- 14.0 - 23: Supported
- 24: Supported
QQ Browser
- 14.9: Support unknown
Baidu Browser
- 13.52: Support unknown
KaiOS Browser
- 2.5: Support unknown
- 3: Support unknown