烟花代码
<!DOCTYPE html>
<html lang="zh-CN">
<head>
<meta charset="UTF-8">
<title>Document</title>
<style type="text/css">
body{
background:black;
overflow:hidden;
margin:0;
}
canvas{
background:#000;
}
</style>
</head>
<body>
<div>
<canvas id="canvas"></canvas>
</div>
</body>
<script type="text/javascript">
window.addEventListener("resize", resizeCanvas, false);
window.addEventListener("DOMContentLoaded", onLoad, false);
window.requestAnimationFrame =
window.requestAnimationFrame ||
window.webkitRequestAnimationFrame ||
window.mozRequestAnimationFrame ||
window.oRequestAnimationFrame ||
window.msRequestAnimationFrame ||
function (callback) {
window.setTimeout(callback, 1000/60);
};
var canvas, ctx, w, h, particles = [], probability = 0.04,
xPoint, yPoint;
function onLoad() {
canvas = document.getElementById("canvas");
ctx = canvas.getContext("2d");
resizeCanvas();
window.requestAnimationFrame(updateWorld);
}
function resizeCanvas() {
