| <svg style="display: block; width: 0; height: 0"> |
| <defs> |
| <filter id="merge"> |
| <femerge> |
| <femergenode in="StrokePaint"></femergenode> |
| <femergenode in="SourceGraphic"></femergenode> |
| </femerge> |
| </filter> |
| </defs> |
| </svg> |
| <canvas id="canvas" width="100" height="100"></canvas> |
| <script> |
| var canvas = document.getElementById('canvas'); |
| var ctx = canvas.getContext('2d'); |
| ctx.filter = 'url(#merge)'; |
| ctx.fillStyle = '#00f'; |
| ctx.strokeStyle = '#0f0'; |
| ctx.fillRect(40, 40, 20, 20); |
| ctx.strokeStyle = '#ff0'; |
| ctx.fillRect(70, 70, 20, 20); |
| </script> |