html5 canvas 移动小方块

时间:2025-03-29 15:08:08
<!doctype html>
<html>
<head>
<meta charset="utf-8">
<title>无标题文档</title>
<style>
body{
background:pink;
}
#c1{
background:white;
} </style> <script>
window.onload = function ()
{
var oc = document.getElementById('c1');
var ogc = oc.getContext('2d');
var num = 0; setInterval(function (){
num++;
ogc.clearRect(0,0,oc.width,oc.height);
ogc.fillRect(num,num,100,100);
},20) }
</script>
</head> <body>
<canvas id="c1" width="400" height="300">
<span>请升级您的浏览器</span>
</canvas>
</body>
</html>