boxSizing

This feature is well established and works across many devices and browser versions. It’s been available across browsers since July 2015.

Syntax: content-box | border-box

Initial value: content-box

| Chrome  | Firefox | Safari  |  Edge  |  IE   |
| :-----: | :-----: | :-----: | :----: | :---: |
|   10    |   29    |   5.1   |   12   |   8   |
|    1′   |    1′   |    3′   |        |       |

See also