| <!DOCTYPE html> | |
| <style> | |
| .cb { | |
| position: relative; | |
| border: 3px solid black; | |
| height: 100px; | |
| width: 150px; | |
| display: inline-block; | |
| vertical-align: top; | |
| margin: 5px; | |
| } | |
| .abs { | |
| margin: 0; | |
| position: absolute; | |
| box-sizing: border-box; | |
| top: 3px; | |
| left: 3px; | |
| outline: 2px solid lime; | |
| width: calc(100% - 6px); | |
| height: calc(100% - 6px); | |
| } | |
| </style> | |
| <div class="cb"><button class="abs">button</button></div> |