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js 缓冲效果代码

时间：2022-07-02 14:49:10 编辑：袖梨来源：一聚教程网

YPE html>

提示：您可以先修改部分代码再运行

<meta charset="utf-8">
        <meta http-equiv="X-UA-Compatible" content="IE=8">
        <style type="text/<a href=" http: target="_blank">css">
            .taxiway{
                
                
                background:#E8E8FF;
            }
            .move{
                
                
                background:#a9ea00;
            }
            #panel {
                float:left;
                }
            #panel div{
                float:left;
                
                border:1px solid #333;
                
                font-size:11px;
            }
            div.transition {
                margin-top: 30px;
                
                
                position: relative;
                margin-bottom:10px;
            }
            div.transition div {
                position: absolute;
                
                
                background: #000;
            }
            div.transition span {
                display: block;
                position: absolute;
                border-bottom: 1px solid #dadada;
                font-size: 10px;
                color: #888;
                
                left: 0px;
            }
            div.transition div#indicator {
                position:absolute;
                background-color:#a9ea00;
                
                top: 0px;
                left: 0px;
            }
            div.transition div#marker {
                background-color: #f00;
                
                
                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;
                
                
                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 style="bottom:'+Math.round((200-min)*factor)+'px">1',
                graph = range(0,200).map(function(v){
                    return '<div style="left:'+v+'px;bottom:'+Math.round((values[v]-min)*factor)+'px;">';
                }).join('') + '<div id="indicator" style="display:none">'
                    +'<div id="marker" style="display:none"><div id="label">';
                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("");
                    }
                    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>
    
    
        <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>

提示：您可以先修改部分代码再运行

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