HTML5进度条特效
建站知识 2021-07-02 23:00www.168986.cn长沙网站建设
请使用支持HTML5的浏览器查看本特效
复制代码
代码如下:<!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;
: 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);
};
/========================================================/
/ Particles
/========================================================/
this.Particle = function () {
this.x = _this.loader.x + ((_this.loaded / 100) _this.loaderWidth) - _this.rand(0, 1);
this.y = _this.ch / 2 + _this.rand(0, _this.loaderHeight) - _this.loaderHeight / 2;
this.vx = (_this.rand(0, 4) - 2) / 100;
this.vy = (_this.rand(0, _this.particleLift) - _this.particleLift 2) / 100;
this.width = _this.rand(1, 4) / 2;
this.height = _this.rand(1, 4) / 2;
this.hue = _this.hue;
};
this.Particle.prototype.update = function (i) {
this.vx += (_this.rand(0, 6) - 3) / 100;
this.vy += _this.gravity;
this.x += this.vx;
this.y += this.vy;
if (this.y > _this.ch) {
_this.particles.splice(i, 1);
}
};
this.Particle.prototype.render = function () {
_this.ctx.fillStyle = 'hsla(' + this.hue + ', 100%, ' + _this.rand(50, 70) + '%, ' + _this.rand(20, 100) / 100 + ')';
_this.ctx.fillRect(this.x, this.y, this.width, this.height);
};
this.createParticles = function () {
var i = this.particleRate;
while (i--) {
this.particles.push(new this.Particle());
};
};
this.updateParticles = function () {
var i = this.particles.length;
while (i--) {
var p = this.particles[i];
p.update(i);
};
};
this.renderParticles = function () {
var i = this.particles.length;
while (i--) {
var p = this.particles[i];
p.render();
};
};</p> <p>/========================================================/
/ Clear Canvas
/========================================================/
this.clearCanvas = function () {
this.ctx.globalCompositeOperation = 'source-over';
this.ctx.clearRect(0, 0, this.cw, this.ch);
this.ctx.globalCompositeOperation = 'lighter';
};
/========================================================/
/ Animation Loop
/========================================================/
this.loop = function () {
var loopIt = function () {
requestAnimationFrame(loopIt, _this.c);
_this.clearCanvas();
_this.createParticles();
_this.updateLoader();
_this.updateParticles();
_this.renderLoader();
_this.renderParticles();
};
loopIt();
};
};
/========================================================/
/ Check Canvas Support
/========================================================/
var isCanvasSupported = function () {
var elem = document.createElement('canvas');
return !!(elem.getContext && elem.getContext('2d'));
};
/========================================================/
/ Setup requestAnimationFrame
/========================================================/
var setupRAF = function () {
var lastTime = 0;
var vendors = ['ms', 'moz', 'webkit', 'o'];
for (var x = 0; x < vendors.length && !window.requestAnimationFrame; ++x) {
window.requestAnimationFrame = window[vendors[x] + 'RequestAnimationFrame'];
window.cancelAnimationFrame = window[vendors[x] + 'CancelAnimationFrame'] || window[vendors[x] + 'CancelRequestAnimationFrame'];
};
if (!window.requestAnimationFrame) {
window.requestAnimationFrame = function (callback, element) {
var currTime = new Date().getTime();
var timeToCall = Math.max(0, 16 - (currTime - lastTime));
var id = window.setTimeout(function () { callback(currTime + timeToCall); }, timeToCall);
lastTime = currTime + timeToCall;
return id;
};
};
if (!window.cancelAnimationFrame) {
window.cancelAnimationFrame = function (id) {
clearTimeout(id);
};
};
};
/========================================================/
/ Define Canvas and Initialize
/========================================================/
if (isCanvasSupported) {
var c = document.createElement('canvas');
c.width = 400;
c.height = 100;
var cw = c.width;
var ch = c.height;
document.body.appendChild(c);
var cl = new lightLoader(c, cw, ch);
setupRAF();
cl.init();
}
</script>
<div style="position:absolute; : 0;width:100%">
<div class="footer-banner" style="width:728px;margin:10px auto;color:White">
HTML5进度条
请使用支持HTML5的浏览器查看本页</div>
</div>
</body>
</html>
上一篇：浅谈html5 响应式布局
下一篇：html5+svg学习指南之SVG基础知识
长沙网站设计
- 如何自己建一个网站 自己想建个网站,怎么建
- 如何制作网站免费建站 创建网站免费注册
- html简单网页代码 html简单网页代码超链接
- dreamweaver网页制作 dreamweaver网页制作模板
- 上海网站建设 上海网站建设制作微信
- 如何制作网站和网页 如何制作一个网页
- html网页制作代码大全 端午节html网页制作代码大
- app开发公司 app开发公司前十名
- html网页制作 html网页制作文字居中
- app制作一个需要多少钱 请人制作一个app多少钱
- 成都网站制作 成都网站制作维护
- 百度建一个网站多少钱 百度做个公司网站要多少
- html+css网页制作成品 web网页制作成品css+javascrip
- html网页制作案例 html网页设计案例
- html+css网页制作成品 web网页制作成品css+javascrip
- 个人网站模板 个人网站模板HTML