How to use canvas to draw hollow circles and solid circles in html5

This article mainly introduces how to use canvas to draw hollow circles and solid circles in HTML5. Friends who need it can refer to it

Here I will share with you an example of how to draw hollow circles and solid circles when learning canvas. The exercises are very simple.

<canvas id="canvas" width="500" height="500" style="background-color: yellow;"></canvas>

var canvas=document.getElementById("canvas");
     var cxt=canvas.getContext("2d");
     //画一个空心圆
     cxt.beginPath();
     cxt.arc(200,200,50,0,360,false);
     cxt.lineWidth=5;
     cxt.strokeStyle="green";
     cxt.stroke();//画空心圆
     cxt.closePath();
     //画一个实心圆
     cxt.beginPath();
     cxt.arc(200,100,50,0,360,false);
     cxt.fillStyle="red";//填充颜色,默认是黑色
     cxt.fill();//画实心圆
     cxt.closePath();
     //空心和实心的组合
     cxt.beginPath();
     cxt.arc(300,300,50,0,360,false);
     cxt.fillStyle="red";
     cxt.fill();
     cxt.strokeStyle="green";
     cxt.stroke();
     cxt.closePath();

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