border-radius
Widely available since 2018-01-29
The border-radius CSS property rounds the corners of the border drawn around an element.
Learning resources on MDN
Browser support (view on caniuse.com)
- Chrome 4 Released on 2010-01-25
- Chrome Android 18 Released on 2012-06-27
- Edge 12 Released on 2015-07-29
- Firefox 4 Released on 2011-03-22
- Firefox for Android 4 Released on 2011-03-29
- Safari 5 Released on 2010-06-07
- Safari on iOS 4.2 Released on 2010-11-22