text: /**
   * smooth-scroll v5.3.3
   * Animate scrolling to anchor links, by Chris Ferdinandi.
   * http://github.com/cferdinandi/smooth-scroll
   *
   * Free to use under the MIT License.
   * http://gomakethings.com/mit/
   */
  
  
  (function (root, factory) {
  	if ( typeof define === 'function' && define.amd ) {
  		define('smoothScroll', factory(root));
  	} else if ( typeof exports === 'object' ) {
  		module.exports = factory(root);
  	} else {
  		root.smoothScroll = factory(root);
  	}
  })(window || this, function (root) {
  
  	'use strict';
  
  	//
  	// Variables
  	//
  
  	var smoothScroll = {}; // Object for public APIs
  	var supports = !!document.querySelector && !!root.addEventListener; // Feature test
  	var settings, eventTimeout, fixedHeader;
  
  	// Default settings
  	var defaults = {
  		speed: 500,
  		easing: 'easeInOutCubic',
  		offset: 0,
  		updateURL: true,
  		callbackBefore: function () {},
  		callbackAfter: function () {}
  	};
  
  
  	//
  	// Methods
  	//
  
  	/**
  	 * A simple forEach() implementation for Arrays, Objects and NodeLists
  	 * @private
  	 * @param {Array|Object|NodeList} collection Collection of items to iterate
  	 * @param {Function} callback Callback function for each iteration
  	 * @param {Array|Object|NodeList} scope Object/NodeList/Array that forEach is iterating over (aka `this`)
  	 */
  	var forEach = function (collection, callback, scope) {
  		if (Object.prototype.toString.call(collection) === '[object Object]') {
  			for (var prop in collection) {
  				if (Object.prototype.hasOwnProperty.call(collection, prop)) {
  					callback.call(scope, collection[prop], prop, collection);
  				}
  			}
  		} else {
  			for (var i = 0, len = collection.length; i < len; i++) {
  				callback.call(scope, collection[i], i, collection);
  			}
  		}
  	};
  
  	/**
  	 * Merge defaults with user options
  	 * @private
  	 * @param {Object} defaults Default settings
  	 * @param {Object} options User options
  	 * @returns {Object} Merged values of defaults and options
  	 */
  	var extend = function ( defaults, options ) {
  		var extended = {};
  		forEach(defaults, function (value, prop) {
  			extended[prop] = defaults[prop];
  		});
  		forEach(options, function (value, prop) {
  			extended[prop] = options[prop];
  		});
  		return extended;
  	};
  
  	/**
  	 * Get the closest matching element up the DOM tree
  	 * @param {Element} elem Starting element
  	 * @param {String} selector Selector to match against (class, ID, or data attribute)
  	 * @return {Boolean|Element} Returns false if not match found
  	 */
  	var getClosest = function (elem, selector) {
  		var firstChar = selector.charAt(0);
  		for ( ; elem && elem !== document; elem = elem.parentNode ) {
  			if ( firstChar === '.' ) {
  				if ( elem.classList.contains( selector.substr(1) ) ) {
  					return elem;
  				}
  			} else if ( firstChar === '#' ) {
  				if ( elem.id === selector.substr(1) ) {
  					return elem;
  				}
  			} else if ( firstChar === '[' ) {
  				if ( elem.hasAttribute( selector.substr(1, selector.length - 2) ) ) {
  					return elem;
  				}
  			}
  		}
  		return false;
  	};
  
  	/**
  	 * Get the height of an element
  	 * @private
  	 * @param  {Node]} elem The element
  	 * @return {Number}     The element's height
  	 */
  	var getHeight = function (elem) {
  		return Math.max( elem.scrollHeight, elem.offsetHeight, elem.clientHeight );
  	};
  
  	/**
  	 * Escape special characters for use with querySelector
  	 * @private
  	 * @param {String} id The anchor ID to escape
  	 * @author Mathias Bynens
  	 * @link https://github.com/mathiasbynens/CSS.escape
  	 */
  	var escapeCharacters = function ( id ) {
  		var string = String(id);
  		var length = string.length;
  		var index = -1;
  		var codeUnit;
  		var result = '';
  		var firstCodeUnit = string.charCodeAt(0);
  		while (++index < length) {
  			codeUnit = string.charCodeAt(index);
  			// Note: there’s no need to special-case astral symbols, surrogate
  			// pairs, or lone surrogates.
  
  			// If the character is NULL (U+0000), then throw an
  			// `InvalidCharacterError` exception and terminate these steps.
  			if (codeUnit === 0x0000) {
  				throw new InvalidCharacterError(
  					'Invalid character: the input contains U+0000.'
  				);
  			}
  
  			if (
  				// If the character is in the range [\1-\1F] (U+0001 to U+001F) or is
  				// U+007F, […]
  				(codeUnit >= 0x0001 && codeUnit <= 0x001F) || codeUnit == 0x007F ||
  				// If the character is the first character and is in the range [0-9]
  				// (U+0030 to U+0039), […]
  				(index === 0 && codeUnit >= 0x0030 && codeUnit <= 0x0039) ||
  				// If the character is the second character and is in the range [0-9]
  				// (U+0030 to U+0039) and the first character is a `-` (U+002D), […]
  				(
  					index === 1 &&
  					codeUnit >= 0x0030 && codeUnit <= 0x0039 &&
  					firstCodeUnit === 0x002D
  				)
  			) {
  				// http://dev.w3.org/csswg/cssom/#escape-a-character-as-code-point
  				result += '\\' + codeUnit.toString(16) + ' ';
  				continue;
  			}
  
  			// If the character is not handled by one of the above rules and is
  			// greater than or equal to U+0080, is `-` (U+002D) or `_` (U+005F), or
  			// is in one of the ranges [0-9] (U+0030 to U+0039), [A-Z] (U+0041 to
  			// U+005A), or [a-z] (U+0061 to U+007A), […]
  			if (
  				codeUnit >= 0x0080 ||
  				codeUnit === 0x002D ||
  				codeUnit === 0x005F ||
  				codeUnit >= 0x0030 && codeUnit <= 0x0039 ||
  				codeUnit >= 0x0041 && codeUnit <= 0x005A ||
  				codeUnit >= 0x0061 && codeUnit <= 0x007A
  			) {
  				// the character itself
  				result += string.charAt(index);
  				continue;
  			}
  
  			// Otherwise, the escaped character.
  			// http://dev.w3.org/csswg/cssom/#escape-a-character
  			result += '\\' + string.charAt(index);
  
  		}
  		return result;
  	};
  
  	/**
  	 * Calculate the easing pattern
  	 * @private
  	 * @link https://gist.github.com/gre/1650294
  	 * @param {String} type Easing pattern
  	 * @param {Number} time Time animation should take to complete
  	 * @returns {Number}
  	 */
  	var easingPattern = function ( type, time ) {
  		var pattern;
  		if ( type === 'easeInQuad' ) pattern = time * time; // accelerating from zero velocity
  		if ( type === 'easeOutQuad' ) pattern = time * (2 - time); // decelerating to zero velocity
  		if ( type === 'easeInOutQuad' ) pattern = time < 0.5 ? 2 * time * time : -1 + (4 - 2 * time) * time; // acceleration until halfway, then deceleration
  		if ( type === 'easeInCubic' ) pattern = time * time * time; // accelerating from zero velocity
  		if ( type === 'easeOutCubic' ) pattern = (--time) * time * time + 1; // decelerating to zero velocity
  		if ( type === 'easeInOutCubic' ) pattern = time < 0.5 ? 4 * time * time * time : (time - 1) * (2 * time - 2) * (2 * time - 2) + 1; // acceleration until halfway, then deceleration
  		if ( type === 'easeInQuart' ) pattern = time * time * time * time; // accelerating from zero velocity
  		if ( type === 'easeOutQuart' ) pattern = 1 - (--time) * time * time * time; // decelerating to zero velocity
  		if ( type === 'easeInOutQuart' ) pattern = time < 0.5 ? 8 * time * time * time * time : 1 - 8 * (--time) * time * time * time; // acceleration until halfway, then deceleration
  		if ( type === 'easeInQuint' ) pattern = time * time * time * time * time; // accelerating from zero velocity
  		if ( type === 'easeOutQuint' ) pattern = 1 + (--time) * time * time * time * time; // decelerating to zero velocity
  		if ( type === 'easeInOutQuint' ) pattern = time < 0.5 ? 16 * time * time * time * time * time : 1 + 16 * (--time) * time * time * time * time; // acceleration until halfway, then deceleration
  		return pattern || time; // no easing, no acceleration
  	};
  
  	/**
  	 * Calculate how far to scroll
  	 * @private
  	 * @param {Element} anchor The anchor element to scroll to
  	 * @param {Number} headerHeight Height of a fixed header, if any
  	 * @param {Number} offset Number of pixels by which to offset scroll
  	 * @returns {Number}
  	 */
  	var getEndLocation = function ( anchor, headerHeight, offset ) {
  		var location = 0;
  		if (anchor.offsetParent) {
  			do {
  				location += anchor.offsetTop;
  				anchor = anchor.offsetParent;
  			} while (anchor);
  		}
  		location = location - headerHeight - offset;
  		return location >= 0 ? location : 0;
  	};
  
  	/**
  	 * Determine the document's height
  	 * @private
  	 * @returns {Number}
  	 */
  	var getDocumentHeight = function () {
  		return Math.max(
  			document.body.scrollHeight, document.documentElement.scrollHeight,
  			document.body.offsetHeight, document.documentElement.offsetHeight,
  			document.body.clientHeight, document.documentElement.clientHeight
  		);
  	};
  
  	/**
  	 * Convert data-options attribute into an object of key/value pairs
  	 * @private
  	 * @param {String} options Link-specific options as a data attribute string
  	 * @returns {Object}
  	 */
  	var getDataOptions = function ( options ) {
  		return !options || !(typeof JSON === 'object' && typeof JSON.parse === 'function') ? {} : JSON.parse( options );
  	};
  
  	/**
  	 * Update the URL
  	 * @private
  	 * @param {Element} anchor The element to scroll to
  	 * @param {Boolean} url Whether or not to update the URL history
  	 */
  	var updateUrl = function ( anchor, url ) {
  		if ( history.pushState && (url || url === 'true') ) {
  			history.pushState( null, null, [root.location.protocol, '//', root.location.host, root.location.pathname, root.location.search, anchor].join('') );
  		}
  	};
  
  	/**
  	 * Start/stop the scrolling animation
  	 * @public
  	 * @param {Element} toggle The element that toggled the scroll event
  	 * @param {Element} anchor The element to scroll to
  	 * @param {Object} options
  	 */
  	smoothScroll.animateScroll = function ( toggle, anchor, options ) {
  
  		// Options and overrides
  		var settings = extend( settings || defaults, options || {} );  // Merge user options with defaults
  		var overrides = getDataOptions( toggle ? toggle.getAttribute('data-options') : null );
  		settings = extend( settings, overrides );
  		anchor = '#' + escapeCharacters(anchor.substr(1)); // Escape special characters and leading numbers
  
  		// Selectors and variables
  		var anchorElem = anchor === '#' ? document.documentElement : document.querySelector(anchor);
  		var startLocation = root.pageYOffset; // Current location on the page
  		if ( !fixedHeader ) { fixedHeader = document.querySelector('[data-scroll-header]'); }  // Get the fixed header if not already set
  		var headerHeight = fixedHeader === null ? 0 : ( getHeight( fixedHeader ) + fixedHeader.offsetTop ); // Get the height of a fixed header if one exists
  		var endLocation = getEndLocation( anchorElem, headerHeight, parseInt(settings.offset, 10) ); // Scroll to location
  		var animationInterval; // interval timer
  		var distance = endLocation - startLocation; // distance to travel
  		var documentHeight = getDocumentHeight();
  		var timeLapsed = 0;
  		var percentage, position;
  
  		// Update URL
  		updateUrl(anchor, settings.updateURL);
  
  		/**
  		 * Stop the scroll animation when it reaches its target (or the bottom/top of page)
  		 * @private
  		 * @param {Number} position Current position on the page
  		 * @param {Number} endLocation Scroll to location
  		 * @param {Number} animationInterval How much to scroll on this loop
  		 */
  		var stopAnimateScroll = function (position, endLocation, animationInterval) {
  			var currentLocation = root.pageYOffset;
  			if ( position == endLocation || currentLocation == endLocation || ( (root.innerHeight + currentLocation) >= documentHeight ) ) {
  				clearInterval(animationInterval);
  				anchorElem.focus();
  				settings.callbackAfter( toggle, anchor ); // Run callbacks after animation complete
  			}
  		};
  
  		/**
  		 * Loop scrolling animation
  		 * @private
  		 */
  		var loopAnimateScroll = function () {
  			timeLapsed += 16;
  			percentage = ( timeLapsed / parseInt(settings.speed, 10) );
  			percentage = ( percentage > 1 ) ? 1 : percentage;
  			position = startLocation + ( distance * easingPattern(settings.easing, percentage) );
  			root.scrollTo( 0, Math.floor(position) );
  			stopAnimateScroll(position, endLocation, animationInterval);
  		};
  
  		/**
  		 * Set interval timer
  		 * @private
  		 */
  		var startAnimateScroll = function () {
  			settings.callbackBefore( toggle, anchor ); // Run callbacks before animating scroll
  			animationInterval = setInterval(loopAnimateScroll, 16);
  		};
  
  		/**
  		 * Reset position to fix weird iOS bug
  		 * @link https://github.com/cferdinandi/smooth-scroll/issues/45
  		 */
  		if ( root.pageYOffset === 0 ) {
  			root.scrollTo( 0, 0 );
  		}
  
  		// Start scrolling animation
  		startAnimateScroll();
  
  	};
  
  	/**
  	 * If smooth scroll element clicked, animate scroll
  	 * @private
  	 */
  	var eventHandler = function (event) {
  		var toggle = getClosest(event.target, '[data-scroll]');
  		if ( toggle && toggle.tagName.toLowerCase() === 'a' ) {
  			event.preventDefault(); // Prevent default click event
  			smoothScroll.animateScroll( toggle, toggle.hash, settings); // Animate scroll
  		}
  	};
  
  	/**
  	 * On window scroll and resize, only run events at a rate of 15fps for better performance
  	 * @private
  	 * @param  {Function} eventTimeout Timeout function
  	 * @param  {Object} settings
  	 */
  	var eventThrottler = function (event) {
  		if ( !eventTimeout ) {
  			eventTimeout = setTimeout(function() {
  				eventTimeout = null; // Reset timeout
  				headerHeight = fixedHeader === null ? 0 : ( getHeight( fixedHeader ) + fixedHeader.offsetTop ); // Get the height of a fixed header if one exists
  			}, 66);
  		}
  	};
  
  	/**
  	 * Destroy the current initialization.
  	 * @public
  	 */
  	smoothScroll.destroy = function () {
  
  		// If plugin isn't already initialized, stop
  		if ( !settings ) return;
  
  		// Remove event listeners
  		document.removeEventListener( 'click', eventHandler, false );
  		root.removeEventListener( 'resize', eventThrottler, false );
  
  		// Reset varaibles
  		settings = null;
  		eventTimeout = null;
  		fixedHeader = null;
  	};
  
  	/**
  	 * Initialize Smooth Scroll
  	 * @public
  	 * @param {Object} options User settings
  	 */
  	smoothScroll.init = function ( options ) {
  
  		// feature test
  		if ( !supports ) return;
  
  		// Destroy any existing initializations
  		smoothScroll.destroy();
  
  		// Selectors and variables
  		settings = extend( defaults, options || {} ); // Merge user options with defaults
  		fixedHeader = document.querySelector('[data-scroll-header]'); // Get the fixed header
  
  		// When a toggle is clicked, run the click handler
  		document.addEventListener('click', eventHandler, false );
  		if ( fixedHeader ) { root.addEventListener( 'resize', eventThrottler, false ); }
  
  	};
  
  
  	//
  	// Public APIs
  	//
  
  	return smoothScroll;
  
  });