https://blog.csdn.net/Feng_wwf/article/details/108461313
玩了一下，好像实现了每一行都是完整的话，造成一种密文的效果hhh。
<!DOCTYPE html>
<html lang="en">
<head><meta charset="UTF-8"><title>Code</title><style>body{margin: 0;overflow: hidden;}</style>
</head><body>
<canvas id="myCanvas"></canvas>
<script>const width = document.getElementById("myCanvas").width = screen.availWidth;const height = document.getElementById("myCanvas").height = screen.availHeight;const ctx = document.getElementById("myCanvas").getContext("2d");const arr = Array(Math.ceil(width / 10)).fill(0);const str = "$%@#$%$@#%$#@%#@$%$@#%$#@!%^!%#^%$!关键字#@$#@$#@!$!#@$#@!^$$$#@$#@!$!#@$#@!$".split("");function rain() {ctx.fillStyle = "rgba(0,0,0,0.05)";ctx.fillRect(0, 0, width, height);ctx.fillStyle = "#8FA";arr.forEach(function (value, index) {//Math.floor(Math.random() * str.length)]ctx.fillText(str[(index + value)%str.length], index * 10, value + 10);arr[index] = value >= height || value > 168888 * Math.random() ? 0 : value + 12;});
}setInterval(rain, 30);
</script>
</body>
</html>
