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钟表.html
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<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta http-equiv="X-UA-Compatible" content="ie=edge">
<title>Document</title>
<style>
* {
margin: 0;
padding: 0;
}
html,body {
height: 100%;
overflow: hidden;
background: pink;
}
#clock {
background: gray;
position: absolute;
left: 50%;
top: 50%;
transform: translate3d(-50%,-50%,0);
}
</style>
</head>
<body>
<canvas id="clock" width="400" height="400"></canvas>
<script>
window.onload = function () {
let clock = document.querySelector("#clock");
if( clock.getContext ){
let ctx = clock.getContext("2d");
setInterval( function () {
ctx.clearRect(0, 0, clock.width, clock.height);
move();
}, 1000);
move();
function move () {
ctx.save();
ctx.lineWidth = 8;
ctx.strokeStyle = "black";
ctx.lineCap = "round";
ctx.translate(200,200);
ctx.rotate(-90*Math.PI/180);
ctx.beginPath();
ctx.save();
ctx.lineWidth = 14;
ctx.strokeStyle = "#325FA2";
ctx.beginPath();
ctx.arc(0,0,140,0,360*Math.PI/180);
ctx.stroke();
ctx.restore();
ctx.save();
for ( let i = 0; i < 12; i++) {
ctx.rotate(30*Math.PI/180);
ctx.beginPath();
ctx.moveTo(100,0);
ctx.lineTo(120,0);
ctx.stroke();
}
ctx.restore();
ctx.save();
ctx.lineWidth = 4;
for ( let i = 0; i < 60; i++) {
if( i % 5 != 0 ) {
ctx.beginPath();
ctx.moveTo(117,0);
ctx.lineTo(120,0);
ctx.stroke();
}
ctx.rotate( 6 * Math.PI / 180);
}
ctx.restore();
let date = new Date();
let s = date.getSeconds();
let m = date.getMinutes() + s / 60;
let h = date.getHours() + m / 60;
h = h > 12 ? h - 12 : h;
ctx.save();
ctx.lineWidth = 14;
ctx.rotate( h * 30 * Math.PI / 180);
ctx.beginPath();
ctx.moveTo( -20, 0);
ctx.lineTo(80, 0);
ctx.stroke();
ctx.restore();
ctx.save();
ctx.lineWidth = 10;
ctx.rotate( m * 6 * Math.PI / 180);
ctx.beginPath();
ctx.moveTo( -28, 0);
ctx.lineTo(112, 0);
ctx.stroke();
ctx.restore();
ctx.save();
ctx.lineWidth = 6;
ctx.strokeStyle = "#D40000";
ctx.fillStyle = "#D40000";
ctx.rotate(s * 6 * Math.PI / 180);
ctx.beginPath();
ctx.moveTo(-30,0);
ctx.lineTo(83,0);
ctx.stroke();
ctx.beginPath();
ctx.arc(0,0,10,0,360 * Math.PI / 180);
ctx.fill();
ctx.beginPath();
ctx.arc(96,0,10,0,360 * Math.PI / 180);
ctx.stroke();
ctx.restore();
ctx.restore();
}
}
};
</script>
</body>
</html>