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<!DOCTYPE html> <html> <head> <title>更多好玩代码来我学习群领取：1097393594</title> </head>
<body> <canvas id="canvas"></canvas> <style type="text/css"> body{margin: 0;
padding: 0; overflow: hidden;} </style> <script type="text/javascript"> var
canvas = document.getElementById('canvas'); var ctx = canvas.getContext('2d');
canvas.height = window.innerHeight; canvas.width = window.innerWidth; var texts
= '0123456789'.split(''); var fontSize = 16; var columns =
canvas.width/fontSize; // 用于计算输出文字时坐标，所以长度即为列数 var drops = []; //初始值 for(var x
= 0; x < columns; x++){ drops[x] = 1; } function draw(){ //让背景逐渐由透明到不透明
ctx.fillStyle = 'rgba(0, 0, 0, 0.05)'; ctx.fillRect(0, 0, canvas.width,
canvas.height); //文字颜色 ctx.fillStyle = '#0F0'; ctx.font = fontSize + 'px
arial'; //逐行输出文字 for(var i = 0; i < drops.length; i++){ var text =
texts[Math.floor(Math.random()*texts.length)]; ctx.fillText(text, i*fontSize,
drops[i]*fontSize); if(drops[i]*fontSize > canvas.height || Math.random() >
0.95){ drops[i] = 0; } drops[i]++; } } setInterval(draw, 33); </script> </body>
</html>
使用方法：复制代码，保存到文本文档中，改后缀为html即可!
