首页 > 网络编程 > JavaScript > javascript技巧 > jQuery api

如jQuery般易用的api风格代码分享

2011-01-27 20:33:34 作者：

最近几天闲来无事，随便写了点代码玩了玩。个人觉得，应该把编码当做一种乐趣，要不然会觉得很累...

回到正题，如jQuery般易用的api风格？那到底是什么样的风格呢？个人觉得比较重要的有两点，一是对dom操作的链式调用，并且都呈队列状态，不仅仅使代码的可读语义变得通俗易懂，而且省去了对同一dom元素的多个链式操作时的回调中嵌回调的方式，这是很重要的一点。
二是对元素的批量操作，这是建立在它强大的选择器上的。jq选择器很强大，这是人所众知的，就不多说了。而且肯定也不是一两天就能实现的了的，所以下面就对我所说的这两点谈谈我的看法。

基于它强大的选择器，jquery所有的dom操作都依赖于根据它选择器取到的一个数组，很多人喜欢把这叫做jq对象。那咱们暂时也先这样叫吧。然后所有的dom操作都是依赖于这个jq对象中每一个元素并发批量执行的。具体到每一个dom操作，大部分的都是呈链式回调的状态，也就是说在这个方法链里面，直接根据方法调用在链中的先后顺序就能知道他们执行的顺序。这种方法链并且串行的形式是它的一大特色。
以至于很多人喜欢用jquery，基本就看中它两点，选择器确实很强大，链式调用确实很方便很易用，代码逻辑瞬间变得简单。正因为他把很多的代码逻辑都放到自己内部去处理了，留给编码者考虑的问题就少了很多，所以一方面你觉得好用的同时，也就失去了一次锻炼编码逻辑的机会。因此我不建议初学者直接学习使用jquery或者其他的框架，因为他们会让你对js的理解越来越少。我的观点是所有的框架或者库都是拿来使用的，拿来提高开发效率和管理便利度的，而不是拿来学习的。（当然，研究源码的除外）。
那么，既然觉得jquery的api风格好用，那我们何尝不尝试一下构建这种类似的api风格呢？（声明：以下尝试都仅仅是提供一种思路，代码并不完善...）

复制代码代码如下:

 
var get = function (ids) { 
var d = document, a = -1; 
this.elements = []; 
if (typeof ids != 'string' && !!ids.length) { 
for (var i=0; i<ids.length; i++) { 
var id = ids[i], o; 
o = typeof id == 'string' ? d.getElementById(id) : id; 
this.elements.push(o); 
} 
} else { 
while (typeof arguments[++a] == 'string') { 
this.elements.push(d.getElementById(arguments[a])); 
} 
} 
} 

然后为它扩展一些操作dom的方法

复制代码代码如下:

 
get.prototype = { 
each : function () {}, 
animate : function () {} 
} 

当然，这种方式和jQuery看起来不太一样，但能理解就行，jquery可能是这个样子：

复制代码代码如下:

 
jQuery = window.jQuery = window.$ = function( selector, context ) { 

return new jQuery.fn.init( selector, context ); 
} 

jQuery.fn = jQuery.prototype = { 
init: function( selector, context ) {} 
} 

接下来对获取的队列进行批量操作，不可避免的就需要一个each的遍历方法。

复制代码代码如下:

 
each : function (fn) { 
for (var i=0; i<this.elements.length; i++) { 
fn.call(this, this.elements[i]) 
} 
return this; 
}, 

each为get.prototype扩展出的方法，提供一个参数function，并且遍历dom列表，把function绑定到每一个元素上。然后让它返回get.prototype，因为prototype本身具有类似于“超类”的性质，所以凡是返回给prototype对象的方法都能继续调用prototype扩展出来到方法。

为了使这个尝试更有意义一点，接下来来做一个animate的函数吧。这个函数是jquery对dom操作很常用的一个方法，有了它，大部分的动画都变得那么简单和容易了。下面会是一个简单的实现：

复制代码代码如下:

 
animate: function (config) { 
if (!this.animQueue) this.animQueue = HR._animQueue = []; 
var a = 0, time, tween, ease, callback; 
while (arguments[++a]) { 
if (typeof arguments[a] == 'number') time = arguments[a]; 
if (typeof arguments[a] == 'string') { 
if (/^ease*/.test(arguments[a])) ease = arguments[a]; 
else tween = arguments[a]; 
} 
if (HR.isFunction(arguments[a])) callback = arguments[a]; 
} 

this.animQueue.push({ 
config: config, 
time: time, 
tween: tween, 
ease: ease, 
callback: callback 
}); 
if (this.animQueue.length == 1) this.execute(this.animQueue); 

return this; 
}, 

光看这一段可能看不出什么端倪，是的，因为要像jquery一样做成串行的方法链，就需要一个临时队列来操作，要不然即使方法链形成了，但这些方法都是并行的，达不到我们想要的效果。所以上面一段代码主要是处理animate推入队列的一个逻辑，然后对参数arguments做了一些判断，以便在写参数的时候能更加随意，除了第一个参数和最后一个callback外，其余参数不用考虑位置和是否必填，以增强易用性。
核心的变换函数在execute上，

复制代码代码如下:

 
execute : function (queue) { 
var _this = this, m = 0, n = 0, 
_anim = function (el, key, from, to, at, tw, ease, cb) { 
var isOP = (key == 'opacity' && !HR.support.opacity), _key = key; 
if (isOP) {to = to*100; _key = 'filter'} 
var s = +new Date, 
d = at, 
b = parseFloat(from) || 0, 
c = to-b; 

(function () { 
var t = +new Date - s; 
if (t >= d) { 
n ++; 
t = d; 
el.style[_key] = (isOP ? 'alpha(opacity=' : '') + Tween.Linear(t, b, c, d) + (key != 'opacity' ? 'px' : '') + (isOP ? ')' : ''); 
!!cb && cb.apply(el); 
if (m == n && _this.animQueue.length > 1) { 
_this.animQueue.shift(); 
_this.execute(_this.animQueue); 
} 

return; 
} 
el.style[_key] = (isOP ? 'alpha(opacity=' : '') + Tween[tw][ease](t, b, c, d) + (key != 'opacity' ? 'px' : '') + (isOP ? ')' : ''); 

if (!HR.timers[el.id]) HR.timers[el.id] = []; 
HR.timers[el.id].push(setTimeout(arguments.callee, 16)); 

})(); 
}, 
_q = this.animQueue[0]; 

return this.each(function (el) { 
for (var k in _q.config) { 
m ++; 
_anim(el, 
k, 
k == 'opacity' && !HR.support.opacity ? HR.getStyle('filter', el) == '' ? 100 : parseInt(HR.getStyle('filter', el).match(/\d{1,3}/g)[0]) : HR.getStyle(k, el), 
_q.config[k], 
typeof _q.time == 'number' ? _q.time : 1000, 
typeof _q.tween == 'string' && !/^ease*/.test(_q.tween) ? _q.tween : 'Quart', 
typeof _q.ease == 'string' && /^ease*/.test(_q.ease) ? _q.ease : 'easeOut', 
_q.callback) 
} 
}); 
} 

这一段看起来就要复杂一些了，最基本的变化还是在_anim这个私有函数上。其余的代码基本在做一些批量的操作，和透明度变化兼容性，以及当前变换是否执行完毕的功能。结合这两段，基本就实现了jquery的animate的效果了。属于一个简化版本。
当然，还不能忘了很重要的一点，就是既然可以变换，那就必须有个stop的方法让这个变换可控，要不然这个代码的可用性会大打折扣，参考以下代码：

复制代码代码如下:

 
stop : function (clearQueue) { 
if (clearQueue) HR._animQueue.length = 0; 
this.each(function (el) { 
if (!!HR.timers[el.id]) 
for (var i=0; i<HR.timers[el.id].length; i++) clearTimeout(HR.timers[el.id][i]) 
}); 
return this; 
}, 

针对不同的dom元素id设置专门的临时计时器存贮，HR.timers[el.id],然后遍历当前dom列表，把对应的计时器clear掉。参数clearQueue作为可选参数，用来控制是否清掉后续等待执行的animate。

为了让这个方法更加好玩一点，我加了几种额外的缓动方式，jquery只有一种swing，然后所有的缓动算法放置在Tween对象中以供使用。下面是我做测试的源码，（如有纰漏，各位见谅）

复制代码代码如下:

 
/* =========== animate js ============ */ 
/* @author:hongru.chen */ 
/* =================================== */ 

if (typeof HR == 'undefined' || !HR) 
HR = { 
extend : function (destination, source, override) { 
if (override === #ff0000) override = true; 
for (var property in source) { 
if (override || !(property in destination)) { 
destination[property] = source[property]; 
} 
} 
return destination; 
} 
}; 

(function () { 

var Tween = { // 以下算子的参数分别表示: t:运行时间，b:开始量，c:总变化量，d:总时间 
Linear: function(t,b,c,d){ return c*t/d + b; }, 
Quad: { 
easeIn: function(t,b,c,d){ 
return c*(t/=d)*t + b; 
}, 
easeOut: function(t,b,c,d){ 
return -c *(t/=d)*(t-2) + b; 
}, 
easeInOut: function(t,b,c,d){ 
if ((t/=d/2) < 1) return c/2*t*t + b; 
return -c/2 * ((--t)*(t-2) - 1) + b; 
} 
}, 
Cubic: { 
easeIn: function(t,b,c,d){ 
return c*(t/=d)*t*t + b; 
}, 
easeOut: function(t,b,c,d){ 
return c*((t=t/d-1)*t*t + 1) + b; 
}, 
easeInOut: function(t,b,c,d){ 
if ((t/=d/2) < 1) return c/2*t*t*t + b; 
return c/2*((t-=2)*t*t + 2) + b; 
} 
}, 
Quart: { 
easeIn: function(t,b,c,d){ 
return c*(t/=d)*t*t*t + b; 
}, 
easeOut: function(t,b,c,d){ 
return -c * ((t=t/d-1)*t*t*t - 1) + b; 
}, 
easeInOut: function(t,b,c,d){ 
if ((t/=d/2) < 1) return c/2*t*t*t*t + b; 
return -c/2 * ((t-=2)*t*t*t - 2) + b; 
} 
}, 
Quint: { 
easeIn: function(t,b,c,d){ 
return c*(t/=d)*t*t*t*t + b; 
}, 
easeOut: function(t,b,c,d){ 
return c*((t=t/d-1)*t*t*t*t + 1) + b; 
}, 
easeInOut: function(t,b,c,d){ 
if ((t/=d/2) < 1) return c/2*t*t*t*t*t + b; 
return c/2*((t-=2)*t*t*t*t + 2) + b; 
} 
}, 
Sine: { 
easeIn: function(t,b,c,d){ 
return -c * Math.cos(t/d * (Math.PI/2)) + c + b; 
}, 
easeOut: function(t,b,c,d){ 
return c * Math.sin(t/d * (Math.PI/2)) + b; 
}, 
easeInOut: function(t,b,c,d){ 
return -c/2 * (Math.cos(Math.PI*t/d) - 1) + b; 
} 
}, 
Expo: { 
easeIn: function(t,b,c,d){ 
return (t==0) ? b : c * Math.pow(2, 10 * (t/d - 1)) + b; 
}, 
easeOut: function(t,b,c,d){ 
return (t==d) ? b+c : c * (-Math.pow(2, -10 * t/d) + 1) + b; 
}, 
easeInOut: function(t,b,c,d){ 
if (t==0) return b; 
if (t==d) return b+c; 
if ((t/=d/2) < 1) return c/2 * Math.pow(2, 10 * (t - 1)) + b; 
return c/2 * (-Math.pow(2, -10 * --t) + 2) + b; 
} 
}, 
Circ: { 
easeIn: function(t,b,c,d){ 
return -c * (Math.sqrt(1 - (t/=d)*t) - 1) + b; 
}, 
easeOut: function(t,b,c,d){ 
return c * Math.sqrt(1 - (t=t/d-1)*t) + b; 
}, 
easeInOut: function(t,b,c,d){ 
if ((t/=d/2) < 1) return -c/2 * (Math.sqrt(1 - t*t) - 1) + b; 
return c/2 * (Math.sqrt(1 - (t-=2)*t) + 1) + b; 
} 
}, 
Elastic: { 
easeIn: function(t,b,c,d,a,p){ 
if (t==0) return b; if ((t/=d)==1) return b+c; if (!p) p=d*.3; 
if (!a || a < Math.abs(c)) { a=c; var s=p/4; } 
else var s = p/(2*Math.PI) * Math.asin (c/a); 
return -(a*Math.pow(2,10*(t-=1)) * Math.sin( (t*d-s)*(2*Math.PI)/p )) + b; 
}, 
easeOut: function(t,b,c,d,a,p){ 
if (t==0) return b; if ((t/=d)==1) return b+c; if (!p) p=d*.3; 
if (!a || a < Math.abs(c)) { a=c; var s=p/4; } 
else var s = p/(2*Math.PI) * Math.asin (c/a); 
return (a*Math.pow(2,-10*t) * Math.sin( (t*d-s)*(2*Math.PI)/p ) + c + b); 
}, 
easeInOut: function(t,b,c,d,a,p){ 
if (t==0) return b; if ((t/=d/2)==2) return b+c; if (!p) p=d*(.3*1.5); 
if (!a || a < Math.abs(c)) { a=c; var s=p/4; } 
else var s = p/(2*Math.PI) * Math.asin (c/a); 
if (t < 1) return -.5*(a*Math.pow(2,10*(t-=1)) * Math.sin( (t*d-s)*(2*Math.PI)/p )) + b; 
return a*Math.pow(2,-10*(t-=1)) * Math.sin( (t*d-s)*(2*Math.PI)/p )*.5 + c + b; 
} 
}, 
Back: { 
easeIn: function(t,b,c,d,s){ 
if (s == undefined) s = 1.70158; 
return c*(t/=d)*t*((s+1)*t - s) + b; 
}, 
easeOut: function(t,b,c,d,s){ 
if (s == undefined) s = 1.70158; 
return c*((t=t/d-1)*t*((s+1)*t + s) + 1) + b; 
}, 
easeInOut: function(t,b,c,d,s){ 
if (s == undefined) s = 1.70158; 
if ((t/=d/2) < 1) return c/2*(t*t*(((s*=(1.525))+1)*t - s)) + b; 
return c/2*((t-=2)*t*(((s*=(1.525))+1)*t + s) + 2) + b; 
} 
}, 
Bounce: { 
easeIn: function(t,b,c,d){ 
return c - Tween.Bounce.easeOut(d-t, 0, c, d) + b; 
}, 
easeOut: function(t,b,c,d){ 
if ((t/=d) < (1/2.75)) { 
return c*(7.5625*t*t) + b; 
} else if (t < (2/2.75)) { 
return c*(7.5625*(t-=(1.5/2.75))*t + .75) + b; 
} else if (t < (2.5/2.75)) { 
return c*(7.5625*(t-=(2.25/2.75))*t + .9375) + b; 
} else { 
return c*(7.5625*(t-=(2.625/2.75))*t + .984375) + b; 
} 
}, 
easeInOut: function(t,b,c,d){ 
if (t < d/2) return Tween.Bounce.easeIn(t*2, 0, c, d) * .5 + b; 
else return Tween.Bounce.easeOut(t*2-d, 0, c, d) * .5 + c*.5 + b; 
} 
} 
} 

var get = function (ids) { 
var d = document, a = -1; 
this.elements = []; 
if (typeof ids != 'string' && !!ids.length) { 
for (var i=0; i<ids.length; i++) { 
var id = ids[i], o; 
o = typeof id == 'string' ? d.getElementById(id) : id; 
this.elements.push(o); 
} 
} else { 
while (typeof arguments[++a] == 'string') { 
this.elements.push(d.getElementById(arguments[a])); 
} 
} 
} 

get.prototype = { 

each : function (fn) { 
for (var i=0; i<this.elements.length; i++) { 
fn.call(this, this.elements[i]) 
} 
return this; 
}, 

setStyle : function (p, v) { 
this.each(function (el) { 
el.style[p] = v; 
}); 
return this; 
}, 

show : function () { 
var _this = this; 
this.each(function (el) { 
_this.setStyle('display', 'block'); 
}) 
return this; 
}, 

hide : function () { 
var _this = this; 
this.each(function (el) { 
_this.setStyle('display', 'none'); 
}) 
return this; 
}, 

animate: function (config) { 
if (!this.animQueue) this.animQueue = HR._animQueue = []; 
var a = 0, time, tween, ease, callback; 
while (arguments[++a]) { 
if (typeof arguments[a] == 'number') time = arguments[a]; 
if (typeof arguments[a] == 'string') { 
if (/^ease*/.test(arguments[a])) ease = arguments[a]; 
else tween = arguments[a]; 
} 
if (HR.isFunction(arguments[a])) callback = arguments[a]; 
} 

this.animQueue.push({ 
config: config, 
time: time, 
tween: tween, 
ease: ease, 
callback: callback 
}); 
if (this.animQueue.length == 1) this.execute(this.animQueue); 

return this; 
}, 

stop : function (clearQueue) { 
if (clearQueue) HR._animQueue.length = 0; 
this.each(function (el) { 
if (!!HR.timers[el.id]) 
for (var i=0; i<HR.timers[el.id].length; i++) clearTimeout(HR.timers[el.id][i]) 
}); 
return this; 
}, 

execute : function (queue) { 
var _this = this, m = 0, n = 0, 
_anim = function (el, key, from, to, at, tw, ease, cb) { 
var isOP = (key == 'opacity' && !HR.support.opacity), _key = key; 
if (isOP) {to = to*100; _key = 'filter'} 
var s = +new Date, 
d = at, 
b = parseFloat(from) || 0, 
c = to-b; 

(function () { 
var t = +new Date - s; 
if (t >= d) { 
n ++; 
t = d; 
el.style[_key] = (isOP ? 'alpha(opacity=' : '') + Tween.Linear(t, b, c, d) + (key != 'opacity' ? 'px' : '') + (isOP ? ')' : ''); 
!!cb && cb.apply(el); 
if (m == n && _this.animQueue.length > 1) { 
_this.animQueue.shift(); 
_this.execute(_this.animQueue); 
} 

return; 
} 
el.style[_key] = (isOP ? 'alpha(opacity=' : '') + Tween[tw][ease](t, b, c, d) + (key != 'opacity' ? 'px' : '') + (isOP ? ')' : ''); 

if (!HR.timers[el.id]) HR.timers[el.id] = []; 
HR.timers[el.id].push(setTimeout(arguments.callee, 16)); 

})(); 
}, 
_q = this.animQueue[0]; 

return this.each(function (el) { 
for (var k in _q.config) { 
m ++; 
_anim(el, 
k, 
k == 'opacity' && !HR.support.opacity ? HR.getStyle('filter', el) == '' ? 100 : parseInt(HR.getStyle('filter', el).match(/\d{1,3}/g)[0]) : HR.getStyle(k, el), 
_q.config[k], 
typeof _q.time == 'number' ? _q.time : 1000, 
typeof _q.tween == 'string' && !/^ease*/.test(_q.tween) ? _q.tween : 'Quart', 
typeof _q.ease == 'string' && /^ease*/.test(_q.ease) ? _q.ease : 'easeOut', 
_q.callback) 
} 
}); 
} 
} 

HR.extend(HR, { 
get : function () { 
return new get(arguments); 
}, 
isFunction : function(o) { 
return typeof(o) == 'function' && (!Function.prototype.call || typeof(o.call) == 'function'); 
}, 
getStyle : function (p, el) { 
return el.currentStyle ? el.currentStyle[p] : document.defaultView.getComputedStyle(el, null).getPropertyValue(p); 
}, 
support : (function () { 
try { 
var d = document.createElement('div'); 
d.style['display'] = 'none'; 
d.innerHTML = '<a style="float:left; opacity:.5;"></a>'; 
var a = d.getElementsByTagName('a')[0]; 
return { 
opacity: a.style.opacity === '0.5' 
} 
} finally { 
d = null; 
} 
})(), 

timers : {} 

}); 
})(); 

然后为了让大家看的直观一点，小做了两个demo
【demo1】

<!doctype html> 
<html> 
<head> 
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> 
<script type="text/javascript" src="http://files.cnblogs.com/hongru/animate.js"></script><style type="text/css"> 
#me, #you { 
border: 2px solid #333; 
margin-bottom: 10px; 
position: absolute; 
overflow: hidden; 
} 
#me {left:0; top: 0} 
#you {left:0; top: 300px} 
</style> 
</head> 
<body> 
<div id="me" style="width:300px">fasdf<br>fasdf<br>fasdf<br>fasdf<br>fasdf<br>fasdf<br></div> 
<div id="you">fasdf<br>fasdf<br></div> 
<input type="button" value="stop" style="margin-top:600px" onclick="HR.get('me','you').stop().animate({top:100})" /> 
<script type="text/javascript"> 
onload = function(){ 
HR.get('me', 'you').animate({width: 500, height:100},2000, function () {this.style.backgroundColor='#333'}).animate({top:200},'easeIn').animate({left:100,opacity:0.2},function(){this.style.borderColor='red'}).animate({width:200, height: 200, left:300, top:200},function(){ 
HR.get('me').animate({width:400, height:100, top:10, left:10, opacity:0.8},2000); 
HR.get('you').animate({height:400},'Bounce','easeIn', 2000) 
}) 
} 
</script></body> 
</html>

[Ctrl+A 全选注:如需引入外部Js需刷新才能执行]

【demo2】

<!DOCTYPE HTML> 
<html> 
<head> 
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> 
<script type="text/javascript"> 
self.moveTo(0,0) 
self.resizeTo(screen.availWidth,screen.availHeight) 
onresize = function () {return false;} 
</script><title>Super Animate</title> 
<meta name="Author" content="hongru.chen" /> 
<script type="text/javascript" src="http://files.cnblogs.com/hongru/animate.js"></script><style type="text/css"> 
html, body {overflow:hidden} 
body, h1, h2, h3, h4, h5, h6, p, ul, dl, ol {margin:0; padding:0} 
li {list-style:none} 
body {height:100%; color: #fff; font: 14px/1.5 'ChunkFive Regular', Arial, Helvetica, sans-serif;} 
.mask {position: absolute; background:#000; width: 100%; height:100%; left:0; top: 0; z-index:999} 
#start {position: absolute; color:#000; font-size:50px; top: 45%; opacity:0; filter:alpha(opacity=0)} 
.bg {position:absolute; background:url(http://images.cnblogs.com/cnblogs_com/hongru/280894/o_bg-1.jpg) 50% 50%; left:0; height:100%; width: 100%} 
#menu dl {padding: 14px 8px 2px 8px} 
#menu {position: absolute; background: #000; font-size: 30px; left: 100px;top:120px; overflow:hidden;height:0; width:176px; z-index:1000} 
#menu dd {font-weight: bold; cursor:pointer; height: 44px;overflow:hidden; position:relative} 
#menu dd ul {position: absolute;left:0;top:0} 
.color-1 {color:#d61565} 
.color-2 {color:#555;} 
.info {position: absolute; width: 300px; left:300px; top: 120px;padding:14px 10px;background: #000;overflow:hidden;width:0;height:30px;display:none;z-index:1000} 
.fs-12 {font-size:12px} 
#waiting {left: 46%; top:46%;font-size:40px; color:#999;position:absolute} 
</style> 
</head> 
<body> 
<div id="menu"> 
<dl> 
<dt><em>岑安 --</em></dt> 
<dd><ul id="menu0"> 
<li>home</li> 
<li class="color-1">home</li> 
</ul></dd> 
<dd> 
<ul id="menu1"> 
<li>info</li> 
<li class="color-1">info</li> 
</ul> 
</dd> 
<dd> 
<ul id="menu2"> 
<li>gallery</li> 
<li class="color-1">gallery</li> 
</ul> 
</dd> 
<dd> 
<ul id="menu3"> 
<li>blog</li> 
<li class="color-1">blog</li> 
</ul> 
</dd> 
<dd> 
<ul id="menu4"> 
<li>contact</li> 
<li class="color-1">contact</li> 
</ul> 
</dd> 
</dl> 
</div> 
<div id="info0" class="info"> 
<p class="color-2"><em>This is Hongru's space <span class="color-1">-- home</span><br>@me: hongru.chenhr@gmail.com</em></p> 
<strong class="color-1">Welcome !</strong><br> 
<p class="fs-12">At vero eos et accusamus et iusto odio dignissimos ducimus qui blanditiis praesentium voluptatum deleniti atque cor rupti quos dolores et quas molestias excepturi sint occaecati cupiditate non provident.<br><br>Lorem ipsum dolor sit amet, consectetur adipisicing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua.<br><br> Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat.</p> 
</div> 
<div id="info1" class="info"> 
<p class="color-2"><em>This is Hongru's space <span class="color-1">-- info</span><br>@me: hongru.chenhr@gmail.com</em></p> 
<strong class="color-1">Welcome !</strong><br> 
<p class="fs-12">At vero eos et accusamus et iusto odio dignissimos ducimus qui blanditiis praesentium voluptatum deleniti atque cor rupti quos dolores et quas molestias excepturi sint occaecati cupiditate non provident.<br><br>Lorem ipsum dolor sit amet, consectetur adipisicing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua.<br><br> Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat.</p> 
</div> 
<div id="info2" class="info"> 
<p class="color-2"><em>This is Hongru's space <span class="color-1">-- gallery</span><br>@me: hongru.chenhr@gmail.com</em></p> 
<strong class="color-1">Welcome !</strong><br> 
<p class="fs-12">At vero eos et accusamus et iusto odio dignissimos ducimus qui blanditiis praesentium voluptatum deleniti atque cor rupti quos dolores et quas molestias excepturi sint occaecati cupiditate non provident.<br><br>Lorem ipsum dolor sit amet, consectetur adipisicing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua.<br><br> Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat.</p> 
</div> 
<div id="info3" class="info"> 
<p class="color-2"><em>This is Hongru's space <span class="color-1">-- blog</span><br>@me: hongru.chenhr@gmail.com</em></p> 
<strong class="color-1">Welcome !</strong><br> 
<p class="fs-12">At vero eos et accusamus et iusto odio dignissimos ducimus qui blanditiis praesentium voluptatum deleniti atque cor rupti quos dolores et quas molestias excepturi sint occaecati cupiditate non provident.<br><br>Lorem ipsum dolor sit amet, consectetur adipisicing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua.<br><br> Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat.</p> 
</div> 
<div id="info4" class="info"> 
<p class="color-2"><em>This is Hongru's space <span class="color-1">-- contact</span><br>@me: hongru.chenhr@gmail.com</em></p> 
<strong class="color-1">Welcome !</strong><br> 
<p class="fs-12">At vero eos et accusamus et iusto odio dignissimos ducimus qui blanditiis praesentium voluptatum deleniti atque cor rupti quos dolores et quas molestias excepturi sint occaecati cupiditate non provident.<br><br>Lorem ipsum dolor sit amet, consectetur adipisicing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua.<br><br> Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat.</p> 
</div> 
<div id="bg" class="bg"> 
</div> 
<div id="mask" class="mask"><strong id="waiting">Waiting...</strong></div> 
<em id="start">Start!</em> 
<script type="text/javascript"> 
onload = function () { 
HR.extend(HR, { 
addEvent: function (o, e, f) { 
o.addEventListener ? o.addEventListener(e, f, false) : o.attachEvent('on'+e, function(){f.call(o)}) 
}, 
$ : function (id) {return document.getElementById(id)}, 
$$ : function (c, p) {return p.getElementsByTagName(c)}, 
superAnim: {}, 
loadImg: function (urls, cb) { 
var n = urls.length, img = [], f = 0; 
for (var i=0; i<n; i++) { 
img[i] = new Image(); 
img[i].src = urls[i]; 
if (img[i].complete) { 
if (++f == n) {cb && cb(); return} else {f++} 
} 
img[i].onload = function () { 
if (++f == n) {cb && cb()} else {f++} 
} 
} 
} 
}) 
HR.superAnim.init = function () { 
var a = HR.$('mask').offsetWidth, 
b = HR.$('mask').offsetHeight, 
dlwp = HR.$('menu'), 
dd = HR.$$('dd', dlwp), 
flag = null, 
clickable = true, 
at; 
HR.get('bg').setStyle('top', -b+'px'); 
HR.loadImg(['http://images.cnblogs.com/cnblogs_com/hongru/280894/o_bg-1.jpg', 
'http://images.cnblogs.com/cnblogs_com/hongru/280894/o_bg-2.jpg', 
'http://images.cnblogs.com/cnblogs_com/hongru/280894/o_bg-3.jpg', 
'http://images.cnblogs.com/cnblogs_com/hongru/280894/o_bg-4.jpg', 
'http://images.cnblogs.com/cnblogs_com/hongru/280894/o_bg-5.jpg'], 
function () { 
HR.get('mask').animate({left: -a}, 3000, function () { 
HR.$('waiting').style.display = 'none'; 
HR.get('start').animate({opacity:1, left:a/2.2},'Elastic').animate({opacity:0,left:a},'Elastic','easeIn', function(){ 
HR.get('bg').animate({top:0},'Bounce',2000, function(){ 
HR.get('menu').animate({height: 286},'Back', function () { 
setTimeout(function(){bgAnim(2)}, 2000); 
}) 
}) 
}) 
}); 
}); 
for (var i=0; i<dd.length; i++) { 
HR.addEvent(dd[i], 'mouseover', function (i) { 
return function () { 
HR.get('menu'+i).stop().animate({top: -48},'Back',500) 
} 
}(i)); 
HR.addEvent(dd[i], 'mouseout', function (i) { 
return function () { 
HR.get('menu'+i).stop().animate({top: 0},'Back',500) 
} 
}(i)); 
HR.addEvent(dd[i], 'click', function (i) { 
return function () { 
if (clickable) { 
clickable = false;//console.log('yes') 
if (flag == null) { 
HR.get('info'+i).show().animate({width:300},'Back').animate({height:360},'Elastic',function(){clickable = true;flag = i;}) 
} else if (flag != i) { 
HR.get('info'+flag).animate({height:30}).animate({width:0},function(){ 
this.style.display = 'none' 
HR.get('info'+i).show().animate({width:300},'Back').animate({height:360},'Elastic',function(){clickable = true;flag = i;}); 
}); 
} else return; 
} 
} 
}(i)); 
} 
function bgAnim (i) { 
clearTimeout(at); 
HR.get('mask').animate({left: 0}, function () { 
HR.$('bg').style.backgroundImage = 'url(http://images.cnblogs.com/cnblogs_com/hongru/280894/o_bg-'+i+'.jpg)'; 
}).animate({left: -a}); 
var n = i+1 == 6 ? 1 : i+1; 
at = setTimeout(function(){bgAnim(n)}, 6000); 
} 
}(); 
} 
</script></body> 
</html>

[Ctrl+A 全选注:如需引入外部Js需刷新才能执行]

如jQuery般易用的api风格代码分享

您可能感兴趣的文章: