请使用支持HTML5的浏览器查看本特效
复制代码
<!DOCTYPE html>
<html>
<head>
<meta charset=’UTF-8′>
<title>HTML5有特色的进度条</title>
<base target=”_blank” />
<style>
body {
background: #111;
color:White;
}
a{color:White;}
canvas {
background: #111;
border: 1px solid #171717;
display: block;
left: 50%;
margin: -51px 0 0 -201px;
position: absolute;
top: 50%;
}
</style>
</head>
<body>
<script type=”text/javascript”>
/*==============================================*/
/* Light Loader
/*==================================================*/
var lightLoader = function (c, cw, ch) {
var _this = this;
this.c = c;
this.ctx = c.getContext(‘2d’);
this.cw = cw;
this.ch = ch;
this.loaded = 0;
this.loaderSpeed = .6;
this.loaderHeight = 10;
this.loaderWidth = 310;
this.loader = {
x: (this.cw / 2) – (this.loaderWidth / 2),
y: (this.ch / 2) – (this.loaderHeight / 2)
};
this.particles = [];
this.particleLift = 180;
this.hueStart = 0
this.hueEnd = 120;
this.hue = 0;
this.gravity = .15;
this.particleRate = 4;
/*========================================================*/
/* Initialize
/*========================================================*/
this.init = function () {
this.loop();
};
/*========================================================*/
/* Utility Functions
/*========================================================*/
this.rand = function (rMi, rMa) { return ~ ~((Math.random() * (rMa – rMi + 1)) + rMi); };
this.hitTest = function (x1, y1, w1, h1, x2, y2, w2, h2) { return !(x1 + w1 < x2 || x2 + w2 < x1 || y1 + h1 < y2 || y2 + h2 < y1); };
/*========================================================*/
/* Update Loader
/*========================================================*/
this.updateLoader = function () {
if (this.loaded < 100) {
this.loaded += this.loaderSpeed;
} else {
this.loaded = 0;
}
};
/*========================================================*/
/* Render Loader
/*========================================================*/
this.renderLoader = function () {
this.ctx.fillStyle = ‘#000’;
this.ctx.fillRect(this.loader.x, this.loader.y, this.loaderWidth, this.loaderHeight);
this.hue = this.hueStart + (this.loaded / 100) * (this.hueEnd – this.hueStart);
var newWidth = (this.loaded / 100) * this.loaderWidth;
this.ctx.fillStyle = ‘hsla(‘ + this.hue + ‘, 100%, 40%, 1)’;
this.ctx.fillRect(this.loader.x, this.loader.y, newWidth, this.loaderHeight);
this.ctx.fillStyle = ‘#222’;
this.ctx.fillRect(this.loader.x, this.loader.y, newWidth, this.loaderHeight / 2);
