xxxxxxxxxx<html><head><meta charset="utf-8"><title>W3Cschool教程(w3cschool.cn)</title></head><body><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.moveTo(20,20); //创建一个起点ctx.lineTo(100,20); // 创建一个水平线ctx.arcTo(150,20,150,70,50); // 创建一个弧ctx.lineTo(150,120); // 继续垂直线ctx.stroke(); //绘画</script> </body></html>