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html5写的一个时钟

看到的一个htm技术分享l5写的时钟

<!doctype><html><head>  <script>   window.onload=function(){    var canvas=document.getElementById("myCanvas");    var c=canvas.getContext("2d");//getContenText  返回一个绘图的环境,其中2d是目前唯一合法的字符  指的是         var drawClock=function(){          c.clearRect(0,0,500,500);//清除画布,          var now =new Date();     var sec=now.getSeconds();     var min=now.getMinutes();     var hour=now.getHours();     hour=hour+min/60;     hour=hour>12?hour-12:hour;//21:36:21 把24小时转12小时制               //表盘     c.lineWidth=10;     c.strokeStyle="blue";     c.beginPath();     c.arc(250,250,200,0,360,false);     c.closePath();     c.stroke();          //1.刻度          //1.1 时刻度     c.lineWidth=7;     c.strokeStyle="#000";     for(var i=0;i<12;i++){           c.save();      c.translate(250,250);      c.rotate(i*30*Math.PI/180);      c.beginPath();      c.moveTo(0,-170);      c.lineTo(0,-190);      c.closePath();      c.stroke();      c.restore();     }          //1.2 分刻度     c.lineWidth=5;     c.strokeStyle="#000";     for(var i=0;i<60;i++){           c.save();      c.translate(250,250);      c.rotate(i*6*Math.PI/180);      c.beginPath();      c.moveTo(0,-170);      c.lineTo(0,-180);      c.closePath();      c.stroke();      c.restore();     }          //2.1 时针         c.save();     c.lineWidth=7;     c.strokeStyle="#000";     c.translate(250,250);     c.rotate(hour*30*Math.PI/180);     c.beginPath();     c.moveTo(0,-100);     c.lineTo(0,10);     c.closePath();     c.stroke();     c.restore();          //2.2 分针         c.save();     c.lineWidth=5;     c.strokeStyle="#333";     c.translate(250,250);     c.rotate( min*6*Math.PI/180);     c.beginPath();     c.moveTo(0,-140);     c.lineTo(0,15);     c.closePath();     c.stroke();     c.restore();          //2.3 秒针         c.save();     c.lineWidth=2;     c.strokeStyle="red";     c.translate(250,250);     c.rotate(sec * 6 *Math.PI/180);     c.beginPath();     c.moveTo(0,-160);     c.lineTo(0,20);     c.closePath();     c.stroke();          //圆心加个圆圈     c.beginPath();     c.arc(0,0,5,0,360,false);     c.closePath();     c.fillStyle="green";     c.fill();     //在秒针前端加个圆点     c.beginPath();     c.arc(0,-140,10,0,360,false);          c.closePath();          c.fillStyle="red";     c.fill();     c.restore();          //3 盘外时刻数字         for(var i=1;i<13;i++){           c.save();      c.lineWidth=5;      c.strokeStyle="blue";      c.font="40px 黑体";      c.translate(250,250);      c.rotate(i*30*Math.PI/180);      c.beginPath();      c.strokeText(""+i,-20,-210);      c.closePath();      c.stroke();      c.restore();     }         }    drawClock();    setInterval(drawClock,1000);   }  </script></head><body>  <canvas width="500" height="500" id="myCanvas" style="background-color:yellow">     垃圾浏览器不支持canvas标签      </canvas> </body></html>

效果图

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html5写的一个时钟