<canvas id="canvas" width="100" height="100"></canvas> | |
<script> | |
var canvas = document.getElementById('canvas'); | |
var ctx = canvas.getContext('2d'); | |
ctx.globalAlpha = 0.5; | |
ctx.fillStyle = '#000'; | |
ctx.fillRect(25, 45, 50, 20); | |
ctx.fillStyle = '#0f0'; | |
ctx.fillRect(25, 25, 50, 20); | |
</script> |