vendor: 5,817 bytes, lines 1-215
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 2.1.3 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 function isFunction(obj) { 41 // Brought from jQuery since it's deprecated 42 return typeof obj === 'function' 43 } 44 45 $.fn.scrollTo = function(target, duration, settings) { 46 if (typeof duration === 'object') { 47 settings = duration; 48 duration = 0; 49 } 50 if (typeof settings === 'function') { 51 settings = { onAfter:settings }; 52 } 53 if (target === 'max') { 54 target = 9e9; 55 } 56 57 settings = $.extend({}, $scrollTo.defaults, settings); 58 // Speed is still recognized for backwards compatibility 59 duration = duration || settings.duration; 60 // Make sure the settings are given right 61 var queue = settings.queue && settings.axis.length > 1; 62 if (queue) { 63 // Let's keep the overall duration 64 duration /= 2; 65 } 66 settings.offset = both(settings.offset); 67 settings.over = both(settings.over); 68 69 return this.each(function() { 70 // Null target yields nothing, just like jQuery does 71 if (target === null) return; 72 73 var win = isWin(this), 74 elem = win ? this.contentWindow || window : this, 75 $elem = $(elem), 76 targ = target, 77 attr = {}, 78 toff; 79 80 switch (typeof targ) { 81 // A number will pass the regex 82 case 'number': 83 case 'string': 84 if (/^([+-]=?)?\d+(\.\d+)?(px|%)?$/.test(targ)) { 85 targ = both(targ); 86 // We are done 87 break; 88 } 89 // Relative/Absolute selector 90 targ = win ? $(targ) : $(targ, elem); 91 /* falls through */ 92 case 'object': 93 if (targ.length === 0) return; 94 // DOMElement / jQuery 95 if (targ.is || targ.style) { 96 // Get the real position of the target 97 toff = (targ = $(targ)).offset(); 98 } 99 } 100 101 var offset = isFunction(settings.offset) && settings.offset(elem, targ) || settings.offset; 102 103 $.each(settings.axis.split(''), function(i, axis) { 104 var Pos = axis === 'x' ? 'Left' : 'Top', 105 pos = Pos.toLowerCase(), 106 key = 'scroll' + Pos, 107 prev = $elem[key](), 108 max = $scrollTo.max(elem, axis); 109 110 if (toff) {// jQuery / DOMElement 111 attr[key] = toff[pos] + (win ? 0 : prev - $elem.offset()[pos]); 112 113 // If it's a dom element, reduce the margin 114 if (settings.margin) { 115 attr[key] -= parseInt(targ.css('margin'+Pos), 10) || 0; 116 attr[key] -= parseInt(targ.css('border'+Pos+'Width'), 10) || 0; 117 } 118 119 attr[key] += offset[pos] || 0; 120 121 if (settings.over[pos]) { 122 // Scroll to a fraction of its width/height 123 attr[key] += targ[axis === 'x'?'width':'height']() * settings.over[pos]; 124 } 125 } else { 126 var val = targ[pos]; 127 // Handle percentage values 128 attr[key] = val.slice && val.slice(-1) === '%' ? 129 parseFloat(val) / 100 * max 130 : val; 131 } 132 133 // Number or 'number' 134 if (settings.limit && /^\d+$/.test(attr[key])) { 135 // Check the limits 136 attr[key] = attr[key] <= 0 ? 0 : Math.min(attr[key], max); 137 } 138 139 // Don't waste time animating, if there's no need. 140 if (!i && settings.axis.length > 1) { 141 if (prev === attr[key]) { 142 // No animation needed 143 attr = {}; 144 } else if (queue) { 145 // Intermediate animation 146 animate(settings.onAfterFirst); 147 // Don't animate this axis again in the next iteration. 148 attr = {}; 149 } 150 } 151 }); 152 153 animate(settings.onAfter); 154 155 function animate(callback) { 156 var opts = $.extend({}, settings, { 157 // The queue setting conflicts with animate() 158 // Force it to always be true 159 queue: true, 160 duration: duration, 161 complete: callback && function() { 162 callback.call(elem, targ, settings); 163 } 164 }); 165 $elem.animate(attr, opts); 166 } 167 }); 168 }; 169 170 // Max scrolling position, works on quirks mode 171 // It only fails (not too badly) on IE, quirks mode. 172 $scrollTo.max = function(elem, axis) { 173 var Dim = axis === 'x' ? 'Width' : 'Height', 174 scroll = 'scroll'+Dim; 175 176 if (!isWin(elem)) 177 return elem[scroll] - $(elem)[Dim.toLowerCase()](); 178 179 var size = 'client' + Dim, 180 doc = elem.ownerDocument || elem.document, 181 html = doc.documentElement, 182 body = doc.body; 183 184 return Math.max(html[scroll], body[scroll]) - Math.min(html[size], body[size]); 185 }; 186 187 function both(val) { 188 return isFunction(val) || $.isPlainObject(val) ? val : { top:val, left:val }; 189 } 190 191 // Add special hooks so that window scroll properties can be animated 192 $.Tween.propHooks.scrollLeft = 193 $.Tween.propHooks.scrollTop = { 194 get: function(t) { 195 return $(t.elem)[t.prop](); 196 }, 197 set: function(t) { 198 var curr = this.get(t); 199 // If interrupt is true and user scrolled, stop animating 200 if (t.options.interrupt && t._last && t._last !== curr) { 201 return $(t.elem).stop(); 202 } 203 var next = Math.round(t.now); 204 // Don't waste CPU 205 // Browsers don't render floating point scroll 206 if (curr !== next) { 207 $(t.elem)[t.prop](next); 208 t._last = this.get(t); 209 } 210 } 211 }; 212 213 // AMD requirement 214 return $scrollTo; 215});
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