javascript 实现45种缓动效果

发表时间：2010-07-21关注度：328 views 评论数：0

[runcode height="300"] .taxiway{ width:800px; height:100px; background:#E8E8FF; } .move{ width:100px; height:100px; background:#a9ea00; } ...

<!doctype html> <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> <script type="text/javascript"> 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 = '<span style="bottom:'+Math.round((0-min)*factor)+'px">0</span>'+ '<span style="bottom:'+Math.round((200-min)*factor)+'px">1</span>', graph = range(0,200).map(function(v){ return '<div style="left:'+v+'px;bottom:'+Math.round((values[v]-min)*factor)+'px;height:1px"></div>'; }).join('') + '<div id="indicator" style="display:none">' +'</div><div id="marker" style="display:none"></div><div id="label"></div>'; 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("<div onclick='draw(this.innerHTML)'>"); builder.push(ease[i]); builder.push("</div>"); } 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> <div class="taxiway"> <div class="move" onclick="transition(this,{field:'left',begin:parseFloat(getCoords(this).left),change:700,ease:tween.bouncePast})"></div> </div> <div class="taxiway"> <div class="move" onclick="transition(this,{field:'width',begin:parseFloat(getStyle(this,'width')),change:300,ease:tween.spring})"></div> </div> <span class="clear"></span> <h2>请点击下表的格子</h2> <div id="transition" class="transition"> </div> </body> </html>

提示：你可以先修改部分代码再运行。

转载请注明文章转载自：网站前端,web前端,前端脚本,前端优化|时代前端 [http://www.52shidai.com]
本文链接地址：javascript 实现45种缓动效果

标签：js缓冲

上一篇: Monster-Chrome浏览器的扩展插件（前端检测）

下一篇:上下拉幕横幅广告效果-基于jQuery

随机日志推荐

发表评论

最热文章
- 100个最漂亮|免费的wordpress模板 - 3,072 views
- 漂亮的javascript对话框(弹出层)组件[附源码] - 2,272 views
- wordpress采集插件—wp-o-matic使用详解 - 1,982 views
- 开启wordpress 3.0多用户的方法 - 1,781 views
- 12个用jQuery插件改变Button按钮的漂亮特效 - 1,765 views
- 国人原创的WordPress杂志主题wp-cms - 1,650 views
- jQuery-bind不能处理绑定hover事件 - 1,615 views
- 封装好的javascript图片滑动效果 - 1,571 views
- 推荐5个漂亮的jquery主流图表插件 - 1,557 views
- 文字向上不间断滚动代码-兼容各浏览器 - 1,362 views
最新文章
热门标签

canvas google html HTML5 JavaScript jQuery SEO wordpress 主题优化关键字兼容函数前端优化博客友情链接图片外链工具常用性能技巧排名推广插件搜索搜索引擎收录教程文章方法时间权重模板滚动漂亮特性百度经典网站菜单谷歌遍历链接鼠标滚轮

网站前端,web前端,前端脚本,前端优化|时代前端