canvas基本绘图
<!DOCTYPE html>
<html>
<body>
<meta charset="utf-8">
<canvas id="myCanvas" width="500" height="500">
你的浏览器不支持HTML5
</canvas>
<P>你好，世界</p>
<script type="text/javascript">
var c=document.getElementById("myCanvas");
var ctx=c.getContext("2d");
ctx.lineWidth=10;
ctx.strokeStyle="red";
ctx.lineCap="round";
ctx.beginPath();
ctx.moveTo(10,10);
ctx.lineTo(150,50);
ctx.stroke();
ctx.strokeRect(50,60,20,30);
ctx.fillStyle="green";
ctx.beginPath();
ctx.fillRect(65,75,90,70);
ctx.stroke();
ctx.lineWidth=3;
ctx.strokeStyle="red";
ctx.beginPath();
ctx.arc(300,300,100,0,360*Math.PI/180,true);
ctx.stroke();
ctx.beginPath();
ctx.arc(300,300,50,0,160*Math.PI/180,true);
ctx.stroke();
</script>
</body>
</html>
效果:
