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>

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