tryhtml5_canvas_linejoin 在线代码实例

 <canvas id="myCanvas" width="300" height="150" style="border:1px solid #d3d3d3;">
您的浏览器不支持 HTML5 canvas 标签。</canvas>
<script>
var c=document.getElementById("myCanvas");
var ctx=c.getContext("2d");
ctx.beginPath();
ctx.lineWidth=10;
ctx.lineJoin="round";
ctx.moveTo(20,20);
ctx.lineTo(100,50);
ctx.lineTo(20,100);
ctx.stroke();
</script>