CSS Property: border-top-width
The width of the top border of a box, above the content and padding areas and before the top margin area.
Possible Values
| Value | Note | Example |
|---|---|---|
| [length] | Should not be a negative value. | 10px |
thin | ||
medium | ||
thick | ||
inherit | ||
initial | ||
unset | ||
Example
#adder { border-top-width: 1px; }