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javascript45种缓动效果非常酷_javascript技巧

来源：尔游网

参数	类型	说明
el	element	必需，为页面元素
begin	number	必需，开始的位置
change	number	必需，要移动的距离
duration	number	可选，缓动效果持续时间，默认是500ms。建议取300~1000ms。
field	string	必需，要发生变化的样式属性。请在top，left，bottom,right，width与height中选择。
ftp	number	可选，每秒进行多少帧动画，默认50帧，保证流畅播放。一些参考资料，日本动画1秒36帧，中国卡通24帧，赛车游戏60帧。
ease	function	必需，缓动公式，参数为0~1之间的数。可参考我下面给出的45条公式。
onStart	function	可选，在开始时执行。
onEnd	function	可选，在结束时执行。

prototype流派的缓动公式，只需一个参数（增至45种）

<html dir="ltr" lang="zh-CN"> 
<head> 
<meta charset="utf-8"/> 
<meta http-equiv="X-UA-Compatible" content="IE=8"> 
<style type="text/css"> 
.taxiway{ 
width:800px; 
height:100px; 
background:#E8E8FF; 
} 
.move{ 
width:100px; 
height:100px; 
background:#a9ea00; 
} 
#panel { 
float:left; 
width:810px 
} 
#panel div{ 
float:left; 
width:88px; 
border:1px solid #333; 
height:20px; 
font-size:11px; 
} 
div.transition { 
margin-top: 30px; 
width: 200px; 
height: 200px; 
position: relative; 
margin-bottom:10px; 
} 
div.transition div { 
position: absolute; 
height: 1px; 
width: 1px; 
background: #000; 
} 
div.transition span { 
display: block; 
position: absolute; 
border-bottom: 1px solid #dadada; 
font-size: 10px; 
color: #888; 
width: 200px; 
left: 0px; 
} 
div.transition div#indicator { 
position:absolute; 
background-color:#a9ea00; 
height: 200px; 
top: 0px; 
left: 0px; 
} 
div.transition div#marker { 
background-color: #f00; 
height: 6px; 
width: 6px; 
border-radius: 3px; 
-webkit-border-radius: 3px; 
-moz-border-radius: 3px; 
left: 0px; 
margin-bottom: -3px; 
margin-left: -3px; 
} 
div.transition div#label { 
background: transparent; 
color: #ABD474; 
font-size: 20px; 
height: 20px; 
width: 200px; 
text-align: center; 
top: 80px; 
left: 0px; 
z-index: -1; 
} 
</style> 
 
var getCoords = function(el){ 
var box = el.getBoundingClientRect(), 
doc = el.ownerDocument, 
body = doc.body, 
html = doc.documentElement, 
clientTop = html.clientTop || body.clientTop || 0, 
clientLeft = html.clientLeft || body.clientLeft || 0, 
top = box.top + (self.pageYOffset || html.scrollTop || body.scrollTop ) - clientTop, 
left = box.left + (self.pageXOffset || html.scrollLeft || body.scrollLeft) - clientLeft 
return { 'top': top, 'left': left }; 
}; 
var getStyle = function(el, style){ 
if(!+"\v1"){ 
style = style.replace(/\-(\w)/g, function(all, letter){ 
return letter.toUpperCase(); 
}); 
var value = el.currentStyle[style]; 
(value == "auto")&&(value = "0px" ); 
return value; 
}else{ 
return document.defaultView.getComputedStyle(el, null).getPropertyValue(style) 
} 
} 
var tween = { 
easeInQuad: function(pos){ 
return Math.pow(pos, 2); 
}, 
easeOutQuad: function(pos){ 
return -(Math.pow((pos-1), 2) -1); 
}, 
easeInOutQuad: function(pos){ 
if ((pos/=0.5) < 1) return 0.5*Math.pow(pos,2); 
return -0.5 * ((pos-=2)*pos - 2); 
}, 
easeInCubic: function(pos){ 
return Math.pow(pos, 3); 
}, 
easeOutCubic: function(pos){ 
return (Math.pow((pos-1), 3) +1); 
}, 
easeInOutCubic: function(pos){ 
if ((pos/=0.5) < 1) return 0.5*Math.pow(pos,3); 
return 0.5 * (Math.pow((pos-2),3) + 2); 
}, 
easeInQuart: function(pos){ 
return Math.pow(pos, 4); 
}, 
easeOutQuart: function(pos){ 
return -(Math.pow((pos-1), 4) -1) 
}, 
easeInOutQuart: function(pos){ 
if ((pos/=0.5) < 1) return 0.5*Math.pow(pos,4); 
return -0.5 * ((pos-=2)*Math.pow(pos,3) - 2); 
}, 
easeInQuint: function(pos){ 
return Math.pow(pos, 5); 
}, 
easeOutQuint: function(pos){ 
return (Math.pow((pos-1), 5) +1); 
}, 
easeInOutQuint: function(pos){ 
if ((pos/=0.5) < 1) return 0.5*Math.pow(pos,5); 
return 0.5 * (Math.pow((pos-2),5) + 2); 
}, 
easeInSine: function(pos){ 
return -Math.cos(pos * (Math.PI/2)) + 1; 
}, 
easeOutSine: function(pos){ 
return Math.sin(pos * (Math.PI/2)); 
}, 
easeInOutSine: function(pos){ 
return (-.5 * (Math.cos(Math.PI*pos) -1)); 
}, 
easeInExpo: function(pos){ 
return (pos==0) ? 0 : Math.pow(2, 10 * (pos - 1)); 
}, 
easeOutExpo: function(pos){ 
return (pos==1) ? 1 : -Math.pow(2, -10 * pos) + 1; 
}, 
easeInOutExpo: function(pos){ 
if(pos==0) return 0; 
if(pos==1) return 1; 
if((pos/=0.5) < 1) return 0.5 * Math.pow(2,10 * (pos-1)); 
return 0.5 * (-Math.pow(2, -10 * --pos) + 2); 
}, 
easeInCirc: function(pos){ 
return -(Math.sqrt(1 - (pos*pos)) - 1); 
}, 
easeOutCirc: function(pos){ 
return Math.sqrt(1 - Math.pow((pos-1), 2)) 
}, 
easeInOutCirc: function(pos){ 
if((pos/=0.5) < 1) return -0.5 * (Math.sqrt(1 - pos*pos) - 1); 
return 0.5 * (Math.sqrt(1 - (pos-=2)*pos) + 1); 
}, 
easeOutBounce: function(pos){ 
if ((pos) < (1/2.75)) { 
return (7.5625*pos*pos); 
} else if (pos < (2/2.75)) { 
return (7.5625*(pos-=(1.5/2.75))*pos + .75); 
} else if (pos < (2.5/2.75)) { 
return (7.5625*(pos-=(2.25/2.75))*pos + .9375); 
} else { 
return (7.5625*(pos-=(2.625/2.75))*pos + .984375); 
} 
}, 
easeInBack: function(pos){ 
var s = 1.70158; 
return (pos)*pos*((s+1)*pos - s); 
}, 
easeOutBack: function(pos){ 
var s = 1.70158; 
return (pos=pos-1)*pos*((s+1)*pos + s) + 1; 
}, 
easeInOutBack: function(pos){ 
var s = 1.70158; 
if((pos/=0.5) < 1) return 0.5*(pos*pos*(((s*=(1.525))+1)*pos -s)); 
return 0.5*((pos-=2)*pos*(((s*=(1.525))+1)*pos +s) +2); 
}, 
elastic: function(pos) { 
return -1 * Math.pow(4,-8*pos) * Math.sin((pos*6-1)*(2*Math.PI)/2) + 1; 
}, 
swingFromTo: function(pos) { 
var s = 1.70158; 
return ((pos/=0.5) < 1) ? 0.5*(pos*pos*(((s*=(1.525))+1)*pos - s)) : 
0.5*((pos-=2)*pos*(((s*=(1.525))+1)*pos + s) + 2); 
}, 
swingFrom: function(pos) { 
var s = 1.70158; 
return pos*pos*((s+1)*pos - s); 
}, 
swingTo: function(pos) { 
var s = 1.70158; 
return (pos-=1)*pos*((s+1)*pos + s) + 1; 
}, 
bounce: function(pos) { 
if (pos < (1/2.75)) { 
return (7.5625*pos*pos); 
} else if (pos < (2/2.75)) { 
return (7.5625*(pos-=(1.5/2.75))*pos + .75); 
} else if (pos < (2.5/2.75)) { 
return (7.5625*(pos-=(2.25/2.75))*pos + .9375); 
} else { 
return (7.5625*(pos-=(2.625/2.75))*pos + .984375); 
} 
}, 
bouncePast: function(pos) { 
if (pos < (1/2.75)) { 
return (7.5625*pos*pos); 
} else if (pos < (2/2.75)) { 
return 2 - (7.5625*(pos-=(1.5/2.75))*pos + .75); 
} else if (pos < (2.5/2.75)) { 
return 2 - (7.5625*(pos-=(2.25/2.75))*pos + .9375); 
} else { 
return 2 - (7.5625*(pos-=(2.625/2.75))*pos + .984375); 
} 
}, 
easeFromTo: function(pos) { 
if ((pos/=0.5) < 1) return 0.5*Math.pow(pos,4); 
return -0.5 * ((pos-=2)*Math.pow(pos,3) - 2); 
}, 
easeFrom: function(pos) { 
return Math.pow(pos,4); 
}, 
easeTo: function(pos) { 
return Math.pow(pos,0.25); 
}, 
linear: function(pos) { 
return pos 
}, 
sinusoidal: function(pos) { 
return (-Math.cos(pos*Math.PI)/2) + 0.5; 
}, 
reverse: function(pos) { 
return 1 - pos; 
}, 
mirror: function(pos, transition) { 
transition = transition || tween.sinusoidal; 
if(pos<0.5) 
return transition(pos*2); 
else 
return transition(1-(pos-0.5)*2); 
}, 
flicker: function(pos) { 
var pos = pos + (Math.random()-0.5)/5; 
return tween.sinusoidal(pos < 0 ? 0 : pos > 1 ? 1 : pos); 
}, 
wobble: function(pos) { 
return (-Math.cos(pos*Math.PI*(9*pos))/2) + 0.5; 
}, 
pulse: function(pos, pulses) { 
return (-Math.cos((pos*((pulses||5)-.5)*2)*Math.PI)/2) + .5; 
}, 
blink: function(pos, blinks) { 
return Math.round(pos*(blinks||5)) % 2; 
}, 
spring: function(pos) { 
return 1 - (Math.cos(pos * 4.5 * Math.PI) * Math.exp(-pos * 6)); 
}, 
none: function(pos){ 
return 0 
}, 
full: function(pos){ 
return 1 
} 
} 
var _ = function(id){ 
return document.getElementById(id); 
} 
var transition = function(el){ 
el.style.position = "absolute"; 
var options = arguments[1] || {}, 
begin = options.begin,//开始位置 
change = options.change,//变化量 
duration = options.duration || 500,//缓动效果持续时间 
field = options.field,//必须指定，基本上对top,left,width,height这个属性进行设置 
ftp = options.ftp || 50, 
onEnd = options.onEnd || function(){}, 
ease = options.ease,//要使用的缓动公式 
end = begin + change,//结束位置 
startTime = new Date().getTime();//开始执行的时间 
(function(){ 
setTimeout(function(){ 
var newTime = new Date().getTime(),//当前帧开始的时间 
timestamp = newTime - startTime,//逝去时间 
delta = ease(timestamp / duration); 
el.style[field] = Math.ceil(begin + delta * change) + "px" 
if(duration <= timestamp){ 
el.style[field] = end + "px"; 
onEnd(); 
}else{ 
setTimeout(arguments.callee,1000/ftp); 
} 
},1000/ftp) 
})() 
} 
if (typeof Array.prototype['max'] == 'undefined') { 
Array.prototype.map = function(fn, thisObj) { 
var scope = thisObj || window; 
var a = []; 
for ( var i=0, j=this.length; i < j; ++i ) { 
a.push(fn.call(scope, this[i], i, this)); 
} 
return a; 
}; 
Array.prototype.max = function(){ 
return Math.max.apply({},this) 
} 
Array.prototype.min = function(){ 
return Math.min.apply({},this) 
} 
} 
var range = function(start,end){ 
var _range = [] 
for(var i = start,l=end-start;i<l;i++){ 
_range.push(i) 
} 
return _range 
} 
var draw = function(ease){ 
var demo = _("transition"); 
demo.innerHTML = "";//还原！ 
//***********绘制控制台******************** 
var values = range(0,200).map(function(v){ 
return tween[ease](v/200) * 200; 
}), 
max = Math.max(200, values.max()), 
min = Math.min(0, values.min()); 
if (min==max) { 
min = 0; 
max = 200; 
} 
var factor = 200/(max-min), 
grid = '0'+ 
'1', 
graph = range(0,200).map(function(v){ 
return ''; 
}).join('') + '' 
+''; 
demo.innerHTML = grid + graph; 
var indicator = _("indicator"), 
marker = _("marker"), 
label = _("label"), 
demoTransition = function(pos){ 
var value = tween[ease](pos); 
indicator.style.display = "block"; 
marker.style.display = "block"; 
marker.style.left = Math.round(pos*200)+'px'; 
marker.style.bottom = Math.round((value*200-min)*factor)+'px'; 
label.innerHTML = Math.round(pos*200)+'px'; 
return value; 
} 
transition(indicator,{field:"left",begin:parseFloat(getCoords(demo).left),change:200, 
ease:demoTransition}) 
} 
window.onload = function(){ 
var panelHTML = function(){ 
var builder = []; 
var _temp = 'Back Circ Cubic Expo Quad Quart Quint Sine'.split(' '); 
var ease = _temp.map(function(v){ 
return 'easeIn'+v; 
}); 
ease = ease.concat(_temp.map(function(v){ 
return 'easeOut'+v; 
})); 
ease = ease.concat(_temp.map(function(v){ 
return 'easeInOut'+v; 
})); 
ease = ease.concat('blink bounce bouncePast easeFrom easeFromTo easeOutBounce easeTo elastic'.split(' ')); 
ease = ease.concat('flicker full linear mirror none pulse reverse sinusoidal spring swingTo swingFrom swingFromTo wobble'.split(' ')) 
for(var i =0,l=ease.length;i<l;i++){ 
builder.push(""); 
builder.push(ease[i]); 
builder.push(""); 
} 
return builder.join(''); 
} 
var panel = document.createElement("div"); 
panel.id = "panel" 
panel.innerHTML = panelHTML(); 
_("transition").parentNode.insertBefore(panel,_("transition").nextSibling); 
} 
</ script> 
<title>缓动BY司徒正美</title> 
</head> 
<body> 
 
 
 
 
 
 
 
<h2>请点击下表的格子</h2> 
 
 
</body> 
</html>

[Ctrl+A 全选注:如需引入外部Js需刷新才能执行]