NN2020042801/public/themes/mjmls/static/js/jquery.nav.js

; (function ($, window, document, undefined) {
    'use strict';
    var pluginName = 'navScroll',
        defaults = {
            scrollTime: 500,
            navItemClassName: '',
            navHeight: 'auto',
            mobileDropdown: false,
            mobileDropdownClassName: '',
            mobileBreakpoint: 1024,
            scrollSpy: false
        };
    function NavScroll(element, options) {
        this.element = element;
        this.options = $.extend({},
            defaults, options);
        this._defaults = defaults;
        this._name = pluginName;
        this.init();
    }
    NavScroll.prototype = {
        init: function () {
            var self, options, element, navItem, navOffset, scrollTime;
            self = this;
            options = self.options;
            element = self.element;
            if (options.navItemClassName === '') {
                navItem = $(element).find('a');
            } else {
                navItem = $(element).find('.' + options.navItemClassName);
            }
            if (options.navHeight === 'auto') {
                navOffset = $(element).height();
            } else if (isNaN(options.navHeight)) {
                throw new Error('\'navHeight\' only accepts \'auto\' or a number as value.');
            } else {
                navOffset = options.navHeight;
            }
            navItem.on('click',
                function (e) {
                    var url, parts, target, targetOffset, targetTop;
                    url = this.href;
                    parts = url.split('#');
                    target = parts[1];
                    if (target !== undefined) {
                        e.preventDefault();
                        targetOffset = $('#' + target).offset();
                        targetTop = targetOffset.top;
                    }
                    if ($(this).data('scrolltime') !== undefined) {
                        scrollTime = $(this).data('scrolltime');
                    } else {
                        scrollTime = options.scrollTime;
                    }
                    if (options.mobileDropdown && $(window).width() >= 0 && $(window).width() <= options.mobileBreakpoint) {
                        if (options.mobileDropdownClassName === '') {
                            $(element).find('ul').slideUp('fast');
                        } else {
                            $('.' + options.mobileDropdownClassName).slideUp('fast');
                        }
                    }
                    $('html, body').stop().animate({
                        scrollTop: targetTop - navOffset
                    },
                        scrollTime);
                });
            if (options.scrollSpy) {
                var scrollItems;
                scrollItems = [];
                navItem.each(function () {
                    var scrollItemId = $(this).attr('href');
                    scrollItems.push($(scrollItemId));
                });
                $(window).on('scroll',
                    function () {
                        self.scrollspy(navItem, scrollItems);
                    });
                self.scrollspy(navItem, scrollItems);
            }
        },
        scrollspy: function (navItem, scrollItems) {
            var scrollPos, changeBounds, i, l;
            scrollPos = (document.documentElement && document.documentElement.scrollTop) || document.body.scrollTop;
            l = navItem.length;
            for (i = 0; l > i; i++) {
                var item = scrollItems[i];
                if (scrollPos > (item.offset().top - 65)) {
                    navItem.removeClass('active');
                    $(navItem[i]).addClass('active');
                }
            }
        }
    };
    $.fn[pluginName] = function (options) {
        return this.each(function () {
            if (!$.data(this, 'plugin_' + pluginName)) {
                $.data(this, 'plugin_' + pluginName, new NavScroll(this, options));
            }
        });
    };
})(jQuery, window, document);