vendor: 6,279 bytes, lines 1-210
1/*! 2 * jQuery.scrollTo 3 * Copyright (c) 2007 Ariel Flesler - aflesler â gmail ⢠com | https://github.com/flesler 4 * Licensed under MIT 5 * https://github.com/flesler/jquery.scrollTo 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 = typeof settings.offset === 'function' && 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 typeof val === 'function' || $.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 = 188 $.Tween.propHooks.scrollTop = { 189 get: function(t) { 190 return $(t.elem)[t.prop](); 191 }, 192 set: function(t) { 193 var curr = this.get(t); 194 // If interrupt is true and user scrolled, stop animating 195 if (t.options.interrupt && t._last && t._last !== curr) { 196 return $(t.elem).stop(); 197 } 198 var next = Math.round(t.now); 199 // Don't waste CPU 200 // Browsers don't render floating point scroll 201 if (curr !== next) { 202 $(t.elem)[t.prop](next); 203 t._last = this.get(t); 204 } 205 } 206 }; 207 208 // AMD requirement 209 return $scrollTo; 210});
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