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https://github.com/phistuck/Modernizr/commit/3fb7217f5f8274e2f11fe6cfeda7cfaf9948a1f5\r\n\t\tvar prop = property + ':',\r\n\t\t\tel = document.createElement( 'test' ),\r\n\t\t\tmStyle = el.style;\r\n\r\n\t\tif( !noPrefixes ) {\r\n\t\t\tmStyle.cssText = prop + [ '-webkit-', '-moz-', '-ms-', '-o-', '' ].join( value + ';' + prop ) + value + ';';\r\n\t\t} else {\r\n\t\t\tmStyle.cssText = prop + value;\r\n\t\t}\r\n\t\treturn mStyle[ property ].indexOf( value ) !== -1;\r\n\t}\r\n\r\n\tfunction getPx( unit ) {\r\n\t\treturn parseInt( unit, 10 ) || 0;\r\n\t}\r\n\r\n\tvar uniqueIdCounter = 0;\r\n\r\n\tvar S = {\r\n\t\tclasses: {\r\n\t\t\tplugin: 'fixedsticky',\r\n\t\t\tactive: 'fixedsticky-on',\r\n\t\t\tinactive: 'fixedsticky-off',\r\n\t\t\tclone: 'fixedsticky-dummy',\r\n\t\t\twithoutFixedFixed: 'fixedsticky-withoutfixedfixed'\r\n\t\t},\r\n\t\tkeys: {\r\n\t\t\toffset: 'fixedStickyOffset',\r\n\t\t\tposition: 'fixedStickyPosition',\r\n\t\t\tid: 'fixedStickyId'\r\n\t\t},\r\n\t\ttests: {\r\n\t\t\tsticky: featureTest( 'position', 'sticky' ),\r\n\t\t\tfixed: featureTest( 'position', 'fixed', true )\r\n\t\t},\r\n\t\t// Thanks jQuery!\r\n\t\tgetScrollTop: function() {\r\n\t\t\tvar prop = 'pageYOffset',\r\n\t\t\t\tmethod = 'scrollTop';\r\n\t\t\treturn win ? (prop in win) ? win[ prop ] :\r\n\t\t\t\twin.document.documentElement[ method ] :\r\n\t\t\t\twin.document.body[ method ];\r\n\t\t},\r\n\t\tbypass: function() {\r\n\t\t\t// Check native sticky, check fixed and if fixed-fixed is also included on the page and is supported\r\n\t\t\treturn ( S.tests.sticky && !S.optOut ) ||\r\n\t\t\t\t!S.tests.fixed ||\r\n\t\t\t\twin.FixedFixed && !$( win.document.documentElement ).hasClass( 'fixed-supported' );\r\n\t\t},\r\n\t\tupdate: function( el ) {\r\n\t\t\tif( !el.offsetWidth ) { return; }\r\n\r\n\t\t\tvar $el = $( el ),\r\n\t\t\t\theight = $el.outerHeight(),\r\n\t\t\t\tinitialOffset = $el.data( S.keys.offset ),\r\n\t\t\t\tscroll = S.getScrollTop(),\r\n\t\t\t\tisAlreadyOn = $el.is( '.' + S.classes.active ),\r\n\t\t\t\ttoggle = function( turnOn ) {\r\n\t\t\t\t\t$el[ turnOn ? 'addClass' : 'removeClass' ]( S.classes.active )\r\n\t\t\t\t\t\t[ !turnOn ? 'addClass' : 'removeClass' ]( S.classes.inactive );\r\n\t\t\t\t},\r\n\t\t\t\tviewportHeight = $( window ).height(),\r\n\t\t\t\tposition = $el.data( S.keys.position ),\r\n\t\t\t\tskipSettingToFixed,\r\n\t\t\t\telTop,\r\n\t\t\t\telBottom,\r\n\t\t\t\t$parent = $el.parent(),\r\n\t\t\t\tparentOffset = $parent.offset().top,\r\n\t\t\t\tparentHeight = $parent.outerHeight();\r\n\r\n\t\t\tif( initialOffset === undefined ) {\r\n\t\t\t\tinitialOffset = $el.offset().top;\r\n\t\t\t\t$el.data( S.keys.offset, initialOffset );\r\n\t\t\t\t$el.after( $( '<div>' ).addClass( S.classes.clone ).height( height ) );\r\n\t\t\t} else {\r\n\t\t\t\t$el.next( '.' + S.classes.clone ).height( height );\r\n\t\t\t}\r\n\r\n\t\t\tif( !position ) {\r\n\t\t\t\t// Some browsers require fixed/absolute to report accurate top/left values.\r\n\t\t\t\tskipSettingToFixed = $el.css( 'top' ) !== 'auto' || $el.css( 'bottom' ) !== 'auto';\r\n\r\n\t\t\t\tif( !skipSettingToFixed ) {\r\n\t\t\t\t\t$el.css( 'position', 'fixed' );\r\n\t\t\t\t}\r\n\r\n\t\t\t\tposition = {\r\n\t\t\t\t\ttop: $el.css( 'top' ) !== 'auto',\r\n\t\t\t\t\tbottom: $el.css( 'bottom' ) !== 'auto'\r\n\t\t\t\t};\r\n\r\n\t\t\t\tif( !skipSettingToFixed ) {\r\n\t\t\t\t\t$el.css( 'position', '' );\r\n\t\t\t\t}\r\n\r\n\t\t\t\t$el.data( S.keys.position, position );\r\n\t\t\t}\r\n\r\n\t\t\tfunction isFixedToTop() {\r\n\t\t\t\tvar offsetTop = scroll + elTop;\r\n\r\n\t\t\t\t// Initial Offset Top\r\n\t\t\t\treturn initialOffset < offsetTop &&\r\n\t\t\t\t\t// Container Bottom\r\n\t\t\t\t\toffsetTop + height <= parentOffset + parentHeight;\r\n\t\t\t}\r\n\r\n\t\t\tfunction isFixedToBottom() {\r\n\t\t\t\t// Initial Offset Top + Height\r\n\t\t\t\treturn initialOffset + ( height || 0 ) > scroll + viewportHeight - elBottom &&\r\n\t\t\t\t\t// Container Top\r\n\t\t\t\t\tscroll + viewportHeight - elBottom >= parentOffset + ( height || 0 );\r\n\t\t\t}\r\n\r\n\t\t\telTop = getPx( $el.css( 'top' ) );\r\n\t\t\telBottom = getPx( $el.css( 'bottom' ) );\r\n\r\n\t\t\tif( position.top && isFixedToTop() || position.bottom && isFixedToBottom() ) {\r\n\t\t\t\tif( !isAlreadyOn ) {\r\n\t\t\t\t\ttoggle( true );\r\n\t\t\t\t}\r\n\t\t\t} else {\r\n\t\t\t\tif( isAlreadyOn ) {\r\n\t\t\t\t\ttoggle( false );\r\n\t\t\t\t}\r\n\t\t\t}\r\n\t\t},\r\n\t\tdestroy: function( el ) {\r\n\t\t\tvar $el = $( el );\r\n\t\t\tif (S.bypass()) {\r\n\t\t\t\treturn $el;\r\n\t\t\t}\r\n\r\n\t\t\treturn $el.each(function() {\r\n\t\t\t\tvar $this = $( this );\r\n\t\t\t\tvar id = $this.data( S.keys.id );\r\n\t\t\t\t$( win ).unbind( '.fixedsticky' + id );\r\n\r\n\t\t\t\t$this\r\n\t\t\t\t\t.removeData( [ S.keys.offset, S.keys.position, S.keys.id ] )\r\n\t\t\t\t\t.removeClass( S.classes.active )\r\n\t\t\t\t\t.removeClass( S.classes.inactive )\r\n\t\t\t\t\t.next( '.' + S.classes.clone ).remove();\r\n\t\t\t});\r\n\t\t},\r\n\t\tinit: function( el ) {\r\n\t\t\tvar $el = $( el );\r\n\r\n\t\t\tif( S.bypass() ) {\r\n\t\t\t\treturn $el;\r\n\t\t\t}\r\n\r\n\t\t\treturn $el.each(function() {\r\n\t\t\t\tvar _this = this;\r\n\t\t\t\tvar id = uniqueIdCounter++;\r\n\t\t\t\t$( this ).data( S.keys.id, id );\r\n\r\n\t\t\t\t$( win ).bind( 'scroll.fixedsticky' + id, function() {\r\n\t\t\t\t\tS.update( _this );\r\n\t\t\t\t}).trigger( 'scroll.fixedsticky' + id );\r\n\r\n\t\t\t\t$( win ).bind( 'resize.fixedsticky' + id , function() {\r\n\t\t\t\t\tif( $el.is( '.' + S.classes.active ) ) {\r\n\t\t\t\t\t\tS.update( _this );\r\n\t\t\t\t\t}\r\n\t\t\t\t});\r\n\t\t\t});\r\n\t\t}\r\n\t};\r\n\r\n\twin.FixedSticky = S;\r\n\r\n\t// Plugin\r\n\t$.fn.fixedsticky = function( method ) {\r\n\t\tif ( typeof S[ method ] === 'function') {\r\n\t\t\treturn S[ method ].call( S, this);\r\n\t\t} else if ( typeof method === 'object' || ! method ) {\r\n\t\t\treturn S.init.call( S, this );\r\n\t\t} else {\r\n\t\t\tthrow new Error( 'Method `' +  method + '` does not exist on jQuery.fixedsticky' );\r\n\t\t}\r\n\t};\r\n\r\n\t// Add fallback when fixed-fixed is not available.\r\n\tif( !win.FixedFixed ) {\r\n\t\t$( win.document.documentElement ).addClass( S.classes.withoutFixedFixed );\r\n\t}\r\n\r\n})( window, jQuery );\r\n"]}