以下是 弹性拖动交互切换特效代码 的示例演示效果:
部分效果截图:
HTML代码(index.html):
<!DOCTYPE html>
<html lang="en" class="no-js">
<head>
<meta charset="gb2312" />
<meta http-equiv="X-UA-Compatible" content="IE=edge,chrome=1">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>弹性拖动交互切换特效</title>
<link rel="stylesheet" type="text/css" href="css/normalize.css" />
<link rel="stylesheet" type="text/css" href="css/demo.css" />
<link rel="stylesheet" type="text/css" href="css/component.css" />
<script src="js/modernizr.custom.js"></script>
</head>
<body>
<div class="container">
<ul id="elasticstack" class="elasticstack">
<li><img src="img/1.jpg" alt="01"/><h5>Saudade</h5></li>
<li><img src="img/2.jpg" alt="02"/><h5>Tuqburni</h5></li>
<li><img src="img/3.jpg" alt="03"/><h5>Retrouvailles</h5></li>
<li><img src="img/4.jpg" alt="04"/><h5>Onsra</h5></li>
<li><img src="img/5.jpg" alt="05"/><h5>Mamihlapinatapai</h5></li>
<li><img src="img/6.jpg" alt="06"/><h5>Koi No Yokan</h5></li>
</ul>
</div><!-- /container -->
<script src="js/draggabilly.pkgd.min.js"></script>
<script src="js/elastiStack.js"></script>
<script>
new ElastiStack( document.getElementById( 'elasticstack' ) );
</script>
</body>
</html>
JS代码(elastiStack.js):
/** * elastiStack.js v1.0.0 * http://www.codrops.com * * Licensed under the MIT license. * http://www.opensource.org/licenses/mit-license.php * * Copyright 2013,Codrops * http://www.codrops.com */
;
( function( window ){
'use strict';
function extend( a,b ){
for( var key in b ){
if( b.hasOwnProperty( key ) ){
a[key] = b[key];
}
}
return a;
}
// supportvar is3d = !!getStyleProperty( 'perspective' ),supportTransitions = Modernizr.csstransitions,// transition end event nametransEndEventNames ={
'WebkitTransition':'webkitTransitionEnd','MozTransition':'transitionend','OTransition':'oTransitionEnd','msTransition':'MSTransitionEnd','transition':'transitionend'}
,transEndEventName = transEndEventNames[ Modernizr.prefixed( 'transition' ) ];
function ElastiStack( el,options ){
this.container = el;
this.options = extend({
}
,this.options );
extend( this.options,options );
this._init();
}
function setTransformStyle( el,tval ){
el.style.WebkitTransform = tval;
el.style.msTransform = tval;
el.style.transform = tval;
}
ElastiStack.prototype.options ={
// distDragBack:if the user stops dragging the image in a area that does not exceed [distDragBack]px for either x or y then the image goes back to the stackdistDragBack:200,// distDragMax:if the user drags the image in a area that exceeds [distDragMax]px for either x or y then the image moves away from the stackdistDragMax:450,// callbackonUpdateStack:function( current ){
return false;
}
}
;
ElastiStack.prototype._init = function(){
// itemsthis.items = [].slice.call( this.container.children );
// total itemsthis.itemsCount = this.items.length;
// current item's index (the one on the top of the stack)this.current = 0;
// set initial stylesthis._setStackStyle();
// return if no items or only oneif( this.itemsCount <= 1 ) return;
// add dragging capabilitythis._initDragg();
// init drag eventsthis._initEvents();
}
;
ElastiStack.prototype._initEvents = function(){
var self = this;
this.draggie.on( 'dragStart',function( i,e,p ){
self._onDragStart( i,e,p );
}
);
this.draggie.on( 'dragMove',function( i,e,p ){
self._onDragMove( i,e,p );
}
);
this.draggie.on( 'dragEnd',function( i,e,p ){
self._onDragEnd( i,e,p );
}
);
}
;
ElastiStack.prototype._setStackStyle = function(){
var item1 = this._firstItem(),item2 = this._secondItem(),item3 = this._thirdItem();
if( item1 ){
item1.style.opacity = 1;
item1.style.zIndex = 4;
setTransformStyle( item1,is3d ? 'translate3d(0,0,0)':'translate(0,0)' );
}
if( item2 ){
item2.style.opacity = 1;
item2.style.zIndex = 3;
setTransformStyle( item2,is3d ? 'translate3d(0,0,-60px)':'translate(0,0)' );
}
if( item3 ){
item3.style.opacity = 1;
item3.style.zIndex = 2;
setTransformStyle( item3,is3d ? 'translate3d(0,0,-120px)':'translate(0,0)' );
}
}
;
ElastiStack.prototype._moveAway = function( instance ){
// disable dragthis._disableDragg();
// add class "animate"classie.add( instance.element,'animate' );
// calculate how much to translate in the x and y axisvar tVal = this._getTranslateVal( instance );
// apply itsetTransformStyle( instance.element,is3d ? 'translate3d(' + tVal.x + 'px,' + tVal.y + 'px,0px)':'translate(' + tVal.x + 'px,' + tVal.y + 'px)' );
// item also fades outinstance.element.style.opacity = 0;
// other items move back to stackvar item2 = this._secondItem(),item3 = this._thirdItem();
if( item2 ){
classie.add( item2,'move-back' );
classie.add( item2,'animate' );
setTransformStyle( item2,is3d ? 'translate3d(0,0,-60px)':'translate(0,0)' );
}
if( item3 ){
classie.add( item3,'move-back' );
classie.add( item3,'animate' );
setTransformStyle( item3,is3d ? 'translate3d(0,0,-120px)':'translate(0,0)' );
}
// after transition ends..var self = this,onEndTransFn = function(){
instance.element.removeEventListener( transEndEventName,onEndTransFn );
// reset first itemsetTransformStyle( instance.element,is3d ? 'translate3d(0,0,-180px)':'translate(0,0,0)' );
instance.element.style.left = instance.element.style.top = '0px';
instance.element.style.zIndex = -1;
classie.remove( instance.element,'animate' );
// reorder stackself.current = self.current < self.itemsCount - 1 ? self.current + 1:0;
// new front itemsvar item1 = self._firstItem(),item2 = self._secondItem(),item3 = self._thirdItem();
// reset transition timing functionclassie.remove( item1,'move-back' );
if( item2 ) classie.remove( item2,'move-back' );
if( item3 ) classie.remove( item3,'move-back' );
setTimeout( function(){
// the upcoming one will animate..classie.add( self._lastItem(),'animate' );
// reset styleself._setStackStyle();
}
,25 );
// add dragging capabilityself._initDragg();
// init drag events on new current itemself._initEvents();
// callbackself.options.onUpdateStack( self.current );
}
;
if( supportTransitions ){
instance.element.addEventListener( transEndEventName,onEndTransFn );
}
else{
onEndTransFn.call();
}
}
;
ElastiStack.prototype._moveBack = function( instance ){
var item2 = this._secondItem(),item3 = this._thirdItem();
classie.add( instance.element,'move-back' );
classie.add( instance.element,'animate' );
setTransformStyle( instance.element,is3d ? 'translate3d(0,0,0)':'translate(0,0)' );
instance.element.style.left = '0px';
instance.element.style.top = '0px';
if( item2 ){
classie.add( item2,'move-back' );
classie.add( item2,'animate' );
setTransformStyle( item2,is3d ? 'translate3d(0,0,-60px)':'translate(0,0)' );
}
if( item3 ){
classie.add( item3,'move-back' );
classie.add( item3,'animate' );
setTransformStyle( item3,is3d ? 'translate3d(0,0,-120px)':'translate(0,0)' );
}
}
;
ElastiStack.prototype._onDragStart = function( instance,event,pointer ){
// remove transition classes if anyvar item2 = this._secondItem(),item3 = this._thirdItem();
classie.remove( instance.element,'move-back' );
classie.remove( instance.element,'animate' );
if( item2 ){
classie.remove( item2,'move-back' );
classie.remove( item2,'animate' );
}
if( item3 ){
classie.remove( item3,'move-back' );
classie.remove( item3,'animate' );
}
}
;
ElastiStack.prototype._onDragMove = function( instance,event,pointer ){
if( this._outOfBounds( instance ) ){
this._moveAway( instance );
}
else{
// the second and third items also movevar item2 = this._secondItem(),item3 = this._thirdItem();
if( item2 ){
setTransformStyle( item2,is3d ? 'translate3d(' + ( instance.position.x * .6 ) + 'px,' + ( instance.position.y * .6 ) + 'px,-60px)':'translate(' + ( instance.position.x * .6 ) + 'px,' + ( instance.position.y * .6 ) + 'px)' );
}
if( item3 ){
setTransformStyle( item3,is3d ? 'translate3d(' + ( instance.position.x * .3 ) + 'px,' + ( instance.position.y * .3 ) + 'px,-120px)':'translate(' + ( instance.position.x * .3 ) + 'px,' + ( instance.position.y * .3 ) + 'px)' );
}
}
}
;
ElastiStack.prototype._onDragEnd = function( instance,event,pointer ){
if( this._outOfBounds( instance ) ) return;
if( this._outOfSight(instance) ){
this._moveAway( instance );
}
else{
this._moveBack( instance );
}
}
;
ElastiStack.prototype._initDragg = function(){
this.draggie = new Draggabilly( this.items[ this.current ] );
}
;
ElastiStack.prototype._disableDragg = function(){
this.draggie.disable();
}
;
// returns true if x or y is bigger than distDragMaxElastiStack.prototype._outOfBounds = function( el ){
return Math.abs( el.position.x ) > this.options.distDragMax || Math.abs( el.position.y ) > this.options.distDragMax;
}
;
// returns true if x or y is bigger than distDragBackElastiStack.prototype._outOfSight = function( el ){
return Math.abs( el.position.x ) > this.options.distDragBack || Math.abs( el.position.y ) > this.options.distDragBack;
}
;
ElastiStack.prototype._getTranslateVal = function( el ){
var h = Math.sqrt( Math.pow( el.position.x,2 ) + Math.pow( el.position.y,2 ) ),a = Math.asin( Math.abs( el.position.y ) / h ) / ( Math.PI / 180 ),hL = h + this.options.distDragBack,dx = Math.cos( a * ( Math.PI / 180 ) ) * hL,dy = Math.sin( a * ( Math.PI / 180 ) ) * hL,tx = dx - Math.abs( el.position.x ),ty = dy - Math.abs( el.position.y );
return{
x:el.position.x > 0 ? tx:tx * -1,y:el.position.y > 0 ? ty:ty * -1}
}
;
// returns the first item in the stackElastiStack.prototype._firstItem = function(){
return this.items[ this.current ];
}
;
// returns the second item in the stackElastiStack.prototype._secondItem = function(){
if( this.itemsCount >= 2 ){
return this.current + 1 < this.itemsCount ? this.items[ this.current + 1 ]:this.items[ Math.abs( this.itemsCount - ( this.current + 1 ) ) ];
}
}
;
// returns the third item in the stackElastiStack.prototype._thirdItem = function(){
if( this.itemsCount >= 3 ){
return this.current + 2 < this.itemsCount ? this.items[ this.current + 2 ]:this.items[ Math.abs( this.itemsCount - ( this.current + 2 ) ) ];
}
}
;
// returns the last item (of the first three) in the stackElastiStack.prototype._lastItem = function(){
if( this.itemsCount >= 3 ){
return this._thirdItem();
}
else{
return this._secondItem();
}
}
;
// add to global namespacewindow.ElastiStack = ElastiStack;
}
)( window );
JS代码(modernizr.custom.js):
/* Modernizr 2.6.3 (Custom Build) | MIT & BSD * Build:http://modernizr.com/download/#-csstransitions-shiv-cssclasses-prefixed-testprop-testallprops-domprefixes-load */
;
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function x(a){
j.cssText=a}
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return x(prefixes.join(a+";
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return typeof a===b}
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return!!~(""+a).indexOf(b)}
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if(!A(e,"-")&&j[e]!==c)return b=="pfx"?e:!0}
return!1}
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for(j in d)e.setAttribute(j,d[j]);
g||(n.parentNode.insertBefore(e,n),m(c,0))}
}
(this,document),Modernizr.load=function(){
yepnope.apply(window,[].slice.call(arguments,0))}
;
CSS代码(component.css):
*,*:after,*::before{-webkit-box-sizing:border-box;-moz-box-sizing:border-box;box-sizing:border-box;}
.elasticstack{position:relative;margin:40px auto;padding:0;width:340px;height:380px;list-style:none;-webkit-perspective:1000px;-webkit-perspective-origin:50% 150%;perspective:1000px;perspective-origin:50% 150%;}
.no-js .elasticstack{max-width:1090px;width:100%;height:auto;text-align:center;}
.elasticstack li{position:absolute;z-index:1;width:340px;height:380px;border-width:60px 20px;border-style:solid;border-color:#fff;box-shadow:0 10px 7px -7px rgba(0,0,0,0.12),0 0 4px rgba(0,0,0,0.1);opacity:0;cursor:pointer;-webkit-transform:translate3d(0,0,-180px);transform:translate3d(0,0,-180px);-webkit-transform-style:preserve-3d;transform-style:preserve-3d;}
.no-js .elasticstack li{position:relative;display:inline-block;opacity:1;margin:10px;cursor:default;-webkit-transform:translate3d(0,0,0);transform:translate3d(0,0,0);}
.elasticstack li img{display:block;}
.elasticstack li h5{margin:0 5px;color:#143f51;height:60px;text-align:right;font-size:1.4em;font-family:"Sacramento",cursive;line-height:60px;}
.elasticstack li.animate{-webkit-transition:all 0.3s ease-out;transition:all 0.3s ease-out;}
.elasticstack li.move-back{/* http://matthewlein.com/ceaser/ */
-webkit-transition-timing-function:cubic-bezier(0.175,0.885,0.470,1);/* older webkit */
-webkit-transition-timing-function:cubic-bezier(0.175,0.885,0.470,1.515);transition-timing-function:cubic-bezier(0.175,0.885,0.470,1.515);}
CSS代码(demo.css):
@import url(http://fonts.googleapis.com/css?family=Lato:300,400,700|Sacramento);@font-face{font-family:'codropsicons';src:url('../fonts/codropsicons/codropsicons.eot');src:url('../fonts/codropsicons/codropsicons.eot?#iefix') format('embedded-opentype'),url('../fonts/codropsicons/codropsicons.woff') format('woff'),url('../fonts/codropsicons/codropsicons.ttf') format('truetype'),url('../fonts/codropsicons/codropsicons.svg#codropsicons') format('svg');font-weight:normal;font-style:normal;}
body{font-family:'Lato',Arial,sans-serif;background:#add8df;color:#fff;overflow-x:hidden;overflow-y:scroll;font-weight:300;}
.clearfix:before,.clearfix:after{content:'';display:table;}
.clearfix:after{clear:both;}
a{color:rgba(0,0,0,0.4);text-decoration:none;outline:none;}
a:hover,a:focus{color:#fff;}
.container > header{margin:0 auto;padding:2em;text-align:center;background:rgba(0,0,0,0.01);}
.container > header h1{font-size:2.625em;line-height:1.3;margin:0;font-weight:300;}
.container > header span{display:block;font-size:63%;font-weight:400;color:rgba(0,0,0,0.4);padding:0.2em 0 0.6em 0.1em;}
.container > header span a{color:#fff;}
.container > header span a:hover{opacity:0.7;}
/* To Navigation Style */
.codrops-top{background:rgba(255,255,255,0.2);text-transform:uppercase;width:100%;font-size:0.7em;line-height:2.2;font-weight:700;}
.codrops-top a{text-decoration:none;padding:0 1em;letter-spacing:0.1em;display:inline-block;}
.codrops-top a:hover{background:rgba(255,255,255,0.6);color:#333;}
.codrops-top span.right{float:right;}
.codrops-top span.right a{float:left;display:block;}
.codrops-icon:before{font-family:'codropsicons';margin:0 4px;speak:none;font-style:normal;font-weight:normal;font-variant:normal;text-transform:none;line-height:1;-webkit-font-smoothing:antialiased;}
.codrops-icon-drop:before{content:"\e001";}
.codrops-icon-prev:before{content:"\e004";}
.related{text-align:center;font-size:1.6em;padding:2em 0;}
.related a{display:block;max-width:200px;margin:0 auto;}
.related a span{display:block;font-size:0.5em;font.weight:300;}
@media screen and (max-width:25em){.codrops-icon span{display:none;}
}
CSS代码(normalize.css):
article,aside,details,figcaption,figure,footer,header,hgroup,main,nav,section,summary{display:block;}
audio,canvas,video{display:inline-block;}
audio:not([controls]){display:none;height:0;}
[hidden]{display:none;}
html{font-family:sans-serif;-ms-text-size-adjust:100%;-webkit-text-size-adjust:100%;}
body{margin:0;}
a:focus{outline:thin dotted;}
a:active,a:hover{outline:0;}
h1{font-size:2em;margin:0.67em 0;}
abbr[title]{border-bottom:1px dotted;}
b,strong{font-weight:bold;}
dfn{font-style:italic;}
hr{-moz-box-sizing:content-box;box-sizing:content-box;height:0;}
mark{background:#ff0;color:#000;}
code,kbd,pre,samp{font-family:monospace,serif;font-size:1em;}
pre{white-space:pre-wrap;}
q{quotes:"\201C" "\201D" "\2018" "\2019";}
small{font-size:80%;}
sub,sup{font-size:75%;line-height:0;position:relative;vertical-align:baseline;}
sup{top:-0.5em;}
sub{bottom:-0.25em;}
img{border:0;}
svg:not(:root){overflow:hidden;}
figure{margin:0;}
fieldset{border:1px solid #c0c0c0;margin:0 2px;padding:0.35em 0.625em 0.75em;}
legend{border:0;padding:0;}
button,input,select,textarea{font-family:inherit;font-size:100%;margin:0;}
button,input{line-height:normal;}
button,select{text-transform:none;}
button,html input[type="button"],input[type="reset"],input[type="submit"]{-webkit-appearance:button;cursor:pointer;}
button[disabled],html input[disabled]{cursor:default;}
input[type="checkbox"],input[type="radio"]{box-sizing:border-box;padding:0;}
input[type="search"]{-webkit-appearance:textfield;-moz-box-sizing:content-box;-webkit-box-sizing:content-box;box-sizing:content-box;}
input[type="search"]::-webkit-search-cancel-button,input[type="search"]::-webkit-search-decoration{-webkit-appearance:none;}
button::-moz-focus-inner,input::-moz-focus-inner{border:0;padding:0;}
textarea{overflow:auto;vertical-align:top;}
table{border-collapse:collapse;border-spacing:0;}
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