HTML5实现的震撼3D焦点图动画的示例代码

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.dg-container{    width: 100%;    height: 450px;    position: relative;}.dg-wrapper{    width: 481px;    height: 316px;    margin: 0 auto;    position: relative;    -webkit-transform-style: preserve-3d;    -moz-transform-style: preserve-3d;    -o-transform-style: preserve-3d;    -ms-transform-style: preserve-3d;    transform-style: preserve-3d;    -webkit-perspective: 1000px;    -moz-perspective: 1000px;    -o-perspective: 1000px;    -ms-perspective: 1000px;    perspective: 1000px;}.dg-wrapper a{    width: 482px;    height: 316px;    display: block;    position: absolute;    left: 0;    top: 0;    background: transparent url(../images/browser.png) no-repeat top left;    box-shadow: 0px 10px 20px rgba(0,0,0,0.3);}.dg-wrapper a.dg-transition{    -webkit-transition: all 0.5s ease-in-out;    -moz-transition: all 0.5s ease-in-out;    -o-transition: all 0.5s ease-in-out;    -ms-transition: all 0.5s ease-in-out;    transition: all 0.5s ease-in-out;}.dg-wrapper a img{    display: block;    padding: 41px 0px 0px 1px;}.dg-wrapper a div{    font-style: italic;    text-align: center;    line-height: 50px;    text-shadow: 1px 1px 1px rgba(255,255,255,0.5);    color: #333;    font-size: 16px;    width: 100%;    bottom: -55px;    display: none;    position: absolute;}.dg-wrapper a.dg-center div{    display: block;}.dg-container nav{    width: 58px;    position: absolute;    z-index: 1000;    bottom: 40px;    left: 50%;    margin-left: -29px;}.dg-container nav span{    text-indent: -9000px;    float: left;    cursor:pointer;    width: 24px;    height: 25px;    opacity: 0.8;    background: transparent url(../images/arrows.png) no-repeat top left;}.dg-container nav span:hover{    opacity: 1;}.dg-container nav span.dg-next{    background-position: top right;    margin-left: 10px;}</pre>## JavaScript代码<pre class="brush: javascript; gutter: false; first-line: 1 hljs" style="margin: 15px auto; padding: 10px 15px; display: block; overflow-x: auto; color: rgb(51, 51, 51); background: rgb(251, 251, 251); word-break: break-all; overflow-wrap: break-word; white-space: pre-wrap; font: 400 12px/20px &quot;courier new&quot;; border-width: 1px 1px 1px 4px; border-style: solid; border-color: rgb(221, 221, 221); border-image: initial; letter-spacing: normal; orphans: 2; text-align: left; text-indent: 0px; text-transform: none; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration-style: initial; text-decoration-color: initial;">/** * jquery.gallery.js * http://www.codrops.com * * Copyright 2011, Pedro Botelho / Codrops * Free to use under the MIT license. * * Date: Mon Jan 30 2012 */(function( $, undefined ) {    /*     * Gallery object.     */    $.Gallery               = function( options, element ) {        this.$el    = $( element );        this._init( options );    };    $.Gallery.defaults      = {        current     : 0,    // index of current item        autoplay    : false,// slideshow on / off        interval    : 2000  // time between transitions    };    $.Gallery.prototype     = {        _init               : function( options ) {            this.options        = $.extend( true, {}, $.Gallery.defaults, options );            // support for 3d / 2d transforms and transitions            this.support3d      = Modernizr.csstransforms3d;            this.support2d      = Modernizr.csstransforms;            this.supportTrans   = Modernizr.csstransitions;            this.$wrapper       = this.$el.find('.dg-wrapper');            this.$items         = this.$wrapper.children();            this.itemsCount     = this.$items.length;            this.$nav           = this.$el.find('nav');            this.$navPrev       = this.$nav.find('.dg-prev');            this.$navNext       = this.$nav.find('.dg-next');            // minimum of 3 items            if( this.itemsCount < 3 ) {                this.$nav.remove();                return false;            }               this.current        = this.options.current;            this.isAnim         = false;            this.$items.css({                'opacity'   : 0,                'visibility': 'hidden'            });            this._validate();            this._layout();            // load the events            this._loadEvents();            // slideshow            if( this.options.autoplay ) {                this._startSlideshow();            }        },        _validate           : function() {            if( this.options.current < 0 || this.options.current > this.itemsCount - 1 ) {                this.current = 0;            }           },        _layout             : function() {            // current, left and right items            this._setItems();            // current item is not changed            // left and right one are rotated and translated            var leftCSS, rightCSS, currentCSS;            if( this.support3d && this.supportTrans ) {                leftCSS     = {                    '-webkit-transform' : 'translateX(-350px) translateZ(-200px) rotateY(45deg)',                    '-moz-transform'    : 'translateX(-350px) translateZ(-200px) rotateY(45deg)',                    '-o-transform'      : 'translateX(-350px) translateZ(-200px) rotateY(45deg)',                    '-ms-transform'     : 'translateX(-350px) translateZ(-200px) rotateY(45deg)',                    'transform'         : 'translateX(-350px) translateZ(-200px) rotateY(45deg)'                };                rightCSS    = {                    '-webkit-transform' : 'translateX(350px) translateZ(-200px) rotateY(-45deg)',                    '-moz-transform'    : 'translateX(350px) translateZ(-200px) rotateY(-45deg)',                    '-o-transform'      : 'translateX(350px) translateZ(-200px) rotateY(-45deg)',                    '-ms-transform'     : 'translateX(350px) translateZ(-200px) rotateY(-45deg)',                    'transform'         : 'translateX(350px) translateZ(-200px) rotateY(-45deg)'                };                leftCSS.opacity     = 1;                leftCSS.visibility  = 'visible';                rightCSS.opacity    = 1;                rightCSS.visibility = 'visible';            }            else if( this.support2d && this.supportTrans ) {                leftCSS     = {                    '-webkit-transform' : 'translate(-350px) scale(0.8)',                    '-moz-transform'    : 'translate(-350px) scale(0.8)',                    '-o-transform'      : 'translate(-350px) scale(0.8)',                    '-ms-transform'     : 'translate(-350px) scale(0.8)',                    'transform'         : 'translate(-350px) scale(0.8)'                };                rightCSS    = {                    '-webkit-transform' : 'translate(350px) scale(0.8)',                    '-moz-transform'    : 'translate(350px) scale(0.8)',                    '-o-transform'      : 'translate(350px) scale(0.8)',                    '-ms-transform'     : 'translate(350px) scale(0.8)',                    'transform'         : 'translate(350px) scale(0.8)'                };                currentCSS  = {                    'z-index'           : 999                };                leftCSS.opacity     = 1;                leftCSS.visibility  = 'visible';                rightCSS.opacity    = 1;                rightCSS.visibility = 'visible';            }            this.$leftItm.css( leftCSS || {} );            this.$rightItm.css( rightCSS || {} );            this.$currentItm.css( currentCSS || {} ).css({                'opacity'   : 1,                'visibility': 'visible'            }).addClass('dg-center');        },        _setItems           : function() {            this.$items.removeClass('dg-center');            this.$currentItm    = this.$items.eq( this.current );            this.$leftItm       = ( this.current === 0 ) ? this.$items.eq( this.itemsCount - 1 ) : this.$items.eq( this.current - 1 );            this.$rightItm      = ( this.current === this.itemsCount - 1 ) ? this.$items.eq( 0 ) : this.$items.eq( this.current + 1 );            if( !this.support3d && this.support2d && this.supportTrans ) {                this.$items.css( 'z-index', 1 );                this.$currentItm.css( 'z-index', 999 );            }            // next & previous items            if( this.itemsCount > 3 ) {                // next item                this.$nextItm       = ( this.$rightItm.index() === this.itemsCount - 1 ) ? this.$items.eq( 0 ) : this.$rightItm.next();                this.$nextItm.css( this._getCoordinates('outright') );                // previous item                this.$prevItm       = ( this.$leftItm.index() === 0 ) ? this.$items.eq( this.itemsCount - 1 ) : this.$leftItm.prev();                this.$prevItm.css( this._getCoordinates('outleft') );            }        },        _loadEvents         : function() {            var _self   = this;            this.$navPrev.on( 'click.gallery', function( event ) {                if( _self.options.autoplay ) {                    clearTimeout( _self.slideshow );                    _self.options.autoplay  = false;                }                _self._navigate('prev');                return false;            });            this.$navNext.on( 'click.gallery', function( event ) {                if( _self.options.autoplay ) {                    clearTimeout( _self.slideshow );                    _self.options.autoplay  = false;                }                _self._navigate('next');                return false;            });            this.$wrapper.on( 'webkitTransitionEnd.gallery transitionend.gallery OTransitionEnd.gallery', function( event ) {                _self.$currentItm.addClass('dg-center');                _self.$items.removeClass('dg-transition');                _self.isAnim    = false;            });        },        _getCoordinates     : function( position ) {            if( this.support3d && this.supportTrans ) {                switch( position ) {                    case 'outleft':                        return {                            '-webkit-transform' : 'translateX(-450px) translateZ(-300px) rotateY(45deg)',                            '-moz-transform'    : 'translateX(-450px) translateZ(-300px) rotateY(45deg)',                            '-o-transform'      : 'translateX(-450px) translateZ(-300px) rotateY(45deg)',                            '-ms-transform'     : 'translateX(-450px) translateZ(-300px) rotateY(45deg)',                            'transform'         : 'translateX(-450px) translateZ(-300px) rotateY(45deg)',                            'opacity'           : 0,                            'visibility'        : 'hidden'                        };                        break;                    case 'outright':                        return {                            '-webkit-transform' : 'translateX(450px) translateZ(-300px) rotateY(-45deg)',                            '-moz-transform'    : 'translateX(450px) translateZ(-300px) rotateY(-45deg)',                            '-o-transform'      : 'translateX(450px) translateZ(-300px) rotateY(-45deg)',                            '-ms-transform'     : 'translateX(450px) translateZ(-300px) rotateY(-45deg)',                            'transform'         : 'translateX(450px) translateZ(-300px) rotateY(-45deg)',                            'opacity'           : 0,                            'visibility'        : 'hidden'                        };                        break;                    case 'left':                        return {                            '-webkit-transform' : 'translateX(-350px) translateZ(-200px) rotateY(45deg)',                            '-moz-transform'    : 'translateX(-350px) translateZ(-200px) rotateY(45deg)',                            '-o-transform'      : 'translateX(-350px) translateZ(-200px) rotateY(45deg)',                            '-ms-transform'     : 'translateX(-350px) translateZ(-200px) rotateY(45deg)',                            'transform'         : 'translateX(-350px) translateZ(-200px) rotateY(45deg)',                            'opacity'           : 1,                            'visibility'        : 'visible'                        };                        break;                    case 'right':                        return {                            '-webkit-transform' : 'translateX(350px) translateZ(-200px) rotateY(-45deg)',                            '-moz-transform'    : 'translateX(350px) translateZ(-200px) rotateY(-45deg)',                            '-o-transform'      : 'translateX(350px) translateZ(-200px) rotateY(-45deg)',                            '-ms-transform'     : 'translateX(350px) translateZ(-200px) rotateY(-45deg)',                            'transform'         : 'translateX(350px) translateZ(-200px) rotateY(-45deg)',                            'opacity'           : 1,                            'visibility'        : 'visible'                        };                        break;                    case 'center':                        return {                            '-webkit-transform' : 'translateX(0px) translateZ(0px) rotateY(0deg)',                            '-moz-transform'    : 'translateX(0px) translateZ(0px) rotateY(0deg)',                            '-o-transform'      : 'translateX(0px) translateZ(0px) rotateY(0deg)',                            '-ms-transform'     : 'translateX(0px) translateZ(0px) rotateY(0deg)',                            'transform'         : 'translateX(0px) translateZ(0px) rotateY(0deg)',                            'opacity'           : 1,                            'visibility'        : 'visible'                        };                        break;                };            }            else if( this.support2d && this.supportTrans ) {                switch( position ) {                    case 'outleft':                        return {                            '-webkit-transform' : 'translate(-450px) scale(0.7)',                            '-moz-transform'    : 'translate(-450px) scale(0.7)',                            '-o-transform'      : 'translate(-450px) scale(0.7)',                            '-ms-transform'     : 'translate(-450px) scale(0.7)',                            'transform'         : 'translate(-450px) scale(0.7)',                            'opacity'           : 0,                            'visibility'        : 'hidden'                        };                        break;                    case 'outright':                        return {                            '-webkit-transform' : 'translate(450px) scale(0.7)',                            '-moz-transform'    : 'translate(450px) scale(0.7)',                            '-o-transform'      : 'translate(450px) scale(0.7)',                            '-ms-transform'     : 'translate(450px) scale(0.7)',                            'transform'         : 'translate(450px) scale(0.7)',                            'opacity'           : 0,                            'visibility'        : 'hidden'                        };                        break;                    case 'left':                        return {                            '-webkit-transform' : 'translate(-350px) scale(0.8)',                            '-moz-transform'    : 'translate(-350px) scale(0.8)',                            '-o-transform'      : 'translate(-350px) scale(0.8)',                            '-ms-transform'     : 'translate(-350px) scale(0.8)',                            'transform'         : 'translate(-350px) scale(0.8)',                            'opacity'           : 1,                            'visibility'        : 'visible'                        };                        break;                    case 'right':                        return {                            '-webkit-transform' : 'translate(350px) scale(0.8)',                            '-moz-transform'    : 'translate(350px) scale(0.8)',                            '-o-transform'      : 'translate(350px) scale(0.8)',                            '-ms-transform'     : 'translate(350px) scale(0.8)',                            'transform'         : 'translate(350px) scale(0.8)',                            'opacity'           : 1,                            'visibility'        : 'visible'                        };                        break;                    case 'center':                        return {                            '-webkit-transform' : 'translate(0px) scale(1)',                            '-moz-transform'    : 'translate(0px) scale(1)',                            '-o-transform'      : 'translate(0px) scale(1)',                            '-ms-transform'     : 'translate(0px) scale(1)',                            'transform'         : 'translate(0px) scale(1)',                            'opacity'           : 1,                            'visibility'        : 'visible'                        };                        break;                };            }            else {                switch( position ) {                    case 'outleft'  :                     case 'outright' :                     case 'left'     :                     case 'right'    :                        return {                            'opacity'           : 0,                            'visibility'        : 'hidden'                        };                        break;                    case 'center'   :                        return {                            'opacity'           : 1,                            'visibility'        : 'visible'                        };                        break;                };            }        },        _navigate           : function( dir ) {            if( this.supportTrans && this.isAnim )                return false;            this.isAnim = true;            switch( dir ) {                case 'next' :                    this.current    = this.$rightItm.index();                    // current item moves left                    this.$currentItm.addClass('dg-transition').css( this._getCoordinates('left') );                    // right item moves to the center                    this.$rightItm.addClass('dg-transition').css( this._getCoordinates('center') );                     // next item moves to the right                    if( this.$nextItm ) {                        // left item moves out                        this.$leftItm.addClass('dg-transition').css( this._getCoordinates('outleft') );                        this.$nextItm.addClass('dg-transition').css( this._getCoordinates('right') );                    }                    else {                        // left item moves right                        this.$leftItm.addClass('dg-transition').css( this._getCoordinates('right') );                    }                    break;                case 'prev' :                    this.current    = this.$leftItm.index();                    // current item moves right                    this.$currentItm.addClass('dg-transition').css( this._getCoordinates('right') );                    // left item moves to the center                    this.$leftItm.addClass('dg-transition').css( this._getCoordinates('center') );                    // prev item moves to the left                    if( this.$prevItm ) {                        // right item moves out                        this.$rightItm.addClass('dg-transition').css( this._getCoordinates('outright') );                        this.$prevItm.addClass('dg-transition').css( this._getCoordinates('left') );                    }                    else {                        // right item moves left                        this.$rightItm.addClass('dg-transition').css( this._getCoordinates('left') );                    }                    break;              };            this._setItems();            if( !this.supportTrans )                this.$currentItm.addClass('dg-center');        },        _startSlideshow     : function() {            var _self   = this;            this.slideshow  = setTimeout( function() {                _self._navigate( 'next' );                if( _self.options.autoplay ) {                    _self._startSlideshow();                }            }, this.options.interval );        },        destroy             : function() {            this.$navPrev.off('.gallery');            this.$navNext.off('.gallery');            this.$wrapper.off('.gallery');        }    };    var logError            = function( message ) {        if ( this.console ) {            console.error( message );        }    };    $.fn.gallery            = function( options ) {        if ( typeof options === 'string' ) {            var args = Array.prototype.slice.call( arguments, 1 );            this.each(function() {                var instance = $.data( this, 'gallery' );                if ( !instance ) {                    logError( "cannot call methods on gallery prior to initialization; " +                    "attempted to call method '" + options + "'" );                    return;                }                if ( !$.isFunction( instance[options] ) || options.charAt(0) === "_" ) {                    logError( "no such method '" + options + "' for gallery instance" );                    return;                }                instance[ options ].apply( instance, args );            });        }         else {            this.each(function() {                var instance = $.data( this, 'gallery' );                if ( !instance ) {                    $.data( this, 'gallery', new $.Gallery( options, this ) );                }            });        }        return this;    };})( jQuery );