name : jquery.scrollTo.js /*! * jQuery.scrollTo * Copyright (c) 2007-2015 Ariel Flesler - aflesler<a>gmail<d>com | http://flesler.blogspot.com * Licensed under MIT * http://flesler.blogspot.com/2007/10/jqueryscrollto.html * @projectDescription Lightweight, cross-browser and highly customizable animated scrolling with jQuery * @author Ariel Flesler * @version 2.1.2 */ ;(function(factory) { 'use strict'; if (typeof define === 'function' && define.amd) { // AMD define( ['jquery'], factory ); } else if (typeof module !== 'undefined' && module.exports) { // CommonJS module.exports = factory( require( 'jquery' ) ); } else { // Global factory( jQuery ); } })(function($) { 'use strict'; var $scrollTo = $.scrollTo = function(target, duration, settings) { return $( window ).scrollTo( target, duration, settings ); }; $scrollTo.defaults = { axis:'xy', duration: 0, limit:true }; function isWin(elem) { return ! elem.nodeName || $.inArray( elem.nodeName.toLowerCase(), ['iframe','#document','html','body'] ) !== -1; } $.fn.scrollTo = function(target, duration, settings) { if (typeof duration === 'object') { settings = duration; duration = 0; } if (typeof settings === 'function') { settings = { onAfter:settings }; } if (target === 'max') { target = 9e9; } settings = $.extend( {}, $scrollTo.defaults, settings ); // Speed is still recognized for backwards compatibility duration = duration || settings.duration; // Make sure the settings are given right var queue = settings.queue && settings.axis.length > 1; if (queue) { // Let's keep the overall duration duration /= 2; } settings.offset = both( settings.offset ); settings.over = both( settings.over ); return this.each(function() { // Null target yields nothing, just like jQuery does if (target === null) { return; } var win = isWin( this ), elem = win ? this.contentWindow || window : this, $elem = $( elem ), targ = target, attr = {}, toff; switch (typeof targ) { // A number will pass the regex case 'number': case 'string': if (/^([+-]=?)?\d+(\.\d+)?(px|%)?$/.test( targ )) { targ = both( targ ); // We are done break; } // Relative/Absolute selector targ = win ? $( targ ) : $( targ, elem ); /* falls through */ case 'object': if (targ.length === 0) { return; } // DOMElement / jQuery if (targ.is || targ.style) { // Get the real position of the target toff = (targ = $( targ )).offset(); } } var offset = $.isFunction( settings.offset ) && settings.offset( elem, targ ) || settings.offset; $.each(settings.axis.split( '' ), function(i, axis) { var Pos = axis === 'x' ? 'Left' : 'Top', pos = Pos.toLowerCase(), key = 'scroll' + Pos, prev = $elem[key](), max = $scrollTo.max( elem, axis ); if (toff) {// jQuery / DOMElement attr[key] = toff[pos] + (win ? 0 : prev - $elem.offset()[pos]); // If it's a dom element, reduce the margin if (settings.margin) { attr[key] -= parseInt( targ.css( 'margin' + Pos ), 10 ) || 0; attr[key] -= parseInt( targ.css( 'border' + Pos + 'Width' ), 10 ) || 0; } attr[key] += offset[pos] || 0; if (settings.over[pos]) { // Scroll to a fraction of its width/height attr[key] += targ[axis === 'x'?'width':'height']() * settings.over[pos]; } } else { var val = targ[pos]; // Handle percentage values attr[key] = val.slice && val.slice( -1 ) === '%' ? parseFloat( val ) / 100 * max : val; } // Number or 'number' if (settings.limit && /^\d+$/.test( attr[key] )) { // Check the limits attr[key] = attr[key] <= 0 ? 0 : Math.min( attr[key], max ); } // Don't waste time animating, if there's no need. if ( ! i && settings.axis.length > 1) { if (prev === attr[key]) { // No animation needed attr = {}; } else if (queue) { // Intermediate animation animate( settings.onAfterFirst ); // Don't animate this axis again in the next iteration. attr = {}; } } }); animate( settings.onAfter ); function animate(callback) { var opts = $.extend({}, settings, { // The queue setting conflicts with animate() // Force it to always be true queue: true, duration: duration, complete: callback && function() { callback.call( elem, targ, settings ); } }); $elem.animate( attr, opts ); } }); }; // Max scrolling position, works on quirks mode // It only fails (not too badly) on IE, quirks mode. $scrollTo.max = function(elem, axis) { var Dim = axis === 'x' ? 'Width' : 'Height', scroll = 'scroll' + Dim; if ( ! isWin( elem )) { return elem[scroll] - $( elem )[Dim.toLowerCase()](); } var size = 'client' + Dim, doc = elem.ownerDocument || elem.document, html = doc.documentElement, body = doc.body; return Math.max( html[scroll], body[scroll] ) - Math.min( html[size], body[size] ); }; function both(val) { return $.isFunction( val ) || $.isPlainObject( val ) ? val : { top:val, left:val }; } // Add special hooks so that window scroll properties can be animated $.Tween.propHooks.scrollLeft = $.Tween.propHooks.scrollTop = { get: function(t) { return $( t.elem )[t.prop](); }, set: function(t) { var curr = this.get( t ); // If interrupt is true and user scrolled, stop animating if (t.options.interrupt && t._last && t._last !== curr) { return $( t.elem ).stop(); } var next = Math.round( t.now ); // Don't waste CPU // Browsers don't render floating point scroll if (curr !== next) { $( t.elem )[t.prop](next); t._last = this.get( t ); } } }; // AMD requirement return $scrollTo; });