vendor: 5,836 bytes, lines 1-209
1/*! 2 * jQuery.scrollTo 3 * Copyright (c) 2007-2015 Ariel Flesler - aflesler<a>gmail<d>com | http://flesler.blogspot.com 4 * Licensed under MIT 5 * http://flesler.blogspot.com/2007/10/jqueryscrollto.html 6 * @projectDescription Lightweight, cross-browser and highly customizable animated scrolling with jQuery 7 * @author Ariel Flesler 8 * @version 2.1.2 9 */ 10;(function(factory) { 11 'use strict'; 12 if (typeof define === 'function' && define.amd) { 13 // AMD 14 define( ['jquery'], factory ); 15 } else if (typeof module !== 'undefined' && module.exports) { 16 // CommonJS 17 module.exports = factory( require( 'jquery' ) ); 18 } else { 19 // Global 20 factory( jQuery ); 21 } 22})(function($) { 23 'use strict'; 24 25 var $scrollTo = $.scrollTo = function(target, duration, settings) { 26 return $( window ).scrollTo( target, duration, settings ); 27 }; 28 29 $scrollTo.defaults = { 30 axis:'xy', 31 duration: 0, 32 limit:true 33 }; 34 35 function isWin(elem) { 36 return ! elem.nodeName || 37 $.inArray( elem.nodeName.toLowerCase(), ['iframe','#document','html','body'] ) !== -1; 38 } 39 40 $.fn.scrollTo = function(target, duration, settings) { 41 if (typeof duration === 'object') { 42 settings = duration; 43 duration = 0; 44 } 45 if (typeof settings === 'function') { 46 settings = { onAfter:settings }; 47 } 48 if (target === 'max') { 49 target = 9e9; 50 } 51 52 settings = $.extend( {}, $scrollTo.defaults, settings ); 53 // Speed is still recognized for backwards compatibility 54 duration = duration || settings.duration; 55 // Make sure the settings are given right 56 var queue = settings.queue && settings.axis.length > 1; 57 if (queue) { 58 // Let's keep the overall duration 59 duration /= 2; 60 } 61 settings.offset = both( settings.offset ); 62 settings.over = both( settings.over ); 63 64 return this.each(function() { 65 // Null target yields nothing, just like jQuery does 66 if (target === null) { return; } 67 68 var win = isWin( this ), 69 elem = win ? this.contentWindow || window : this, 70 $elem = $( elem ), 71 targ = target, 72 attr = {}, 73 toff; 74 75 switch (typeof targ) { 76 // A number will pass the regex 77 case 'number': 78 case 'string': 79 if (/^([+-]=?)?\d+(\.\d+)?(px|%)?$/.test( targ )) { 80 targ = both( targ ); 81 // We are done 82 break; 83 } 84 // Relative/Absolute selector 85 targ = win ? $( targ ) : $( targ, elem ); 86 /* falls through */ 87 case 'object': 88 if (targ.length === 0) { return; } 89 // DOMElement / jQuery 90 if (targ.is || targ.style) { 91 // Get the real position of the target 92 toff = (targ = $( targ )).offset(); 93 } 94 } 95 96 var offset = $.isFunction( settings.offset ) && settings.offset( elem, targ ) || settings.offset; 97 98 $.each(settings.axis.split( '' ), function(i, axis) { 99 var Pos = axis === 'x' ? 'Left' : 'Top', 100 pos = Pos.toLowerCase(), 101 key = 'scroll' + Pos, 102 prev = $elem[key](), 103 max = $scrollTo.max( elem, axis ); 104 105 if (toff) {// jQuery / DOMElement 106 attr[key] = toff[pos] + (win ? 0 : prev - $elem.offset()[pos]); 107 108 // If it's a dom element, reduce the margin 109 if (settings.margin) { 110 attr[key] -= parseInt( targ.css( 'margin' + Pos ), 10 ) || 0; 111 attr[key] -= parseInt( targ.css( 'border' + Pos + 'Width' ), 10 ) || 0; 112 } 113 114 attr[key] += offset[pos] || 0; 115 116 if (settings.over[pos]) { 117 // Scroll to a fraction of its width/height 118 attr[key] += targ[axis === 'x'?'width':'height']() * settings.over[pos]; 119 } 120 } else { 121 var val = targ[pos]; 122 // Handle percentage values 123 attr[key] = val.slice && val.slice( -1 ) === '%' ? 124 parseFloat( val ) / 100 * max 125 : val; 126 } 127 128 // Number or 'number' 129 if (settings.limit && /^\d+$/.test( attr[key] )) { 130 // Check the limits 131 attr[key] = attr[key] <= 0 ? 0 : Math.min( attr[key], max ); 132 } 133 134 // Don't waste time animating, if there's no need. 135 if ( ! i && settings.axis.length > 1) { 136 if (prev === attr[key]) { 137 // No animation needed 138 attr = {}; 139 } else if (queue) { 140 // Intermediate animation 141 animate( settings.onAfterFirst ); 142 // Don't animate this axis again in the next iteration. 143 attr = {}; 144 } 145 } 146 }); 147 148 animate( settings.onAfter ); 149 150 function animate(callback) { 151 var opts = $.extend({}, settings, { 152 // The queue setting conflicts with animate() 153 // Force it to always be true 154 queue: true, 155 duration: duration, 156 complete: callback && function() { 157 callback.call( elem, targ, settings ); 158 } 159 }); 160 $elem.animate( attr, opts ); 161 } 162 }); 163 }; 164 165 // Max scrolling position, works on quirks mode 166 // It only fails (not too badly) on IE, quirks mode. 167 $scrollTo.max = function(elem, axis) { 168 var Dim = axis === 'x' ? 'Width' : 'Height', 169 scroll = 'scroll' + Dim; 170 171 if ( ! isWin( elem )) { 172 return elem[scroll] - $( elem )[Dim.toLowerCase()](); } 173 174 var size = 'client' + Dim, 175 doc = elem.ownerDocument || elem.document, 176 html = doc.documentElement, 177 body = doc.body; 178 179 return Math.max( html[scroll], body[scroll] ) - Math.min( html[size], body[size] ); 180 }; 181 182 function both(val) { 183 return $.isFunction( val ) || $.isPlainObject( val ) ? val : { top:val, left:val }; 184 } 185 186 // Add special hooks so that window scroll properties can be animated 187 $.Tween.propHooks.scrollLeft = $.Tween.propHooks.scrollTop = { 188 get: function(t) { 189 return $( t.elem )[t.prop](); 190 }, 191 set: function(t) { 192 var curr = this.get( t ); 193 // If interrupt is true and user scrolled, stop animating 194 if (t.options.interrupt && t._last && t._last !== curr) { 195 return $( t.elem ).stop(); 196 } 197 var next = Math.round( t.now ); 198 // Don't waste CPU 199 // Browsers don't render floating point scroll 200 if (curr !== next) { 201 $( t.elem )[t.prop](next); 202 t._last = this.get( t ); 203 } 204 } 205 }; 206 207 // AMD requirement 208 return $scrollTo; 209});
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