base.js

require([
    'domReady',
    'jquery',
    'underscore',
    'gettext',
    'common/js/components/views/feedback_notification',
    'common/js/components/views/feedback_prompt',
    'js/utils/date_utils',
    'js/utils/module',
    'js/utils/handle_iframe_binding',
    'edx-ui-toolkit/js/dropdown-menu/dropdown-menu-view',
    'jquery.ui',
    'jquery.leanModal',
    'jquery.form',
    'jquery.smoothScroll'
],
    function(
        domReady,
        $,
        _,
        gettext,
        NotificationView,
        PromptView,
        DateUtils,
        ModuleUtils,
        IframeUtils,
        DropdownMenuView
    )
{
        var $body;

        domReady(function() {
            var dropdownMenuView;

            $body = $('body');

            $body.on('click', '.embeddable-xml-input', function() {
                $(this).select();
            });

            $body.addClass('js');

            // alerts/notifications - manual close
            $('.action-alert-close, .alert.has-actions .nav-actions a').bind('click', hideAlert);
            $('.action-notification-close').bind('click', hideNotification);

            // nav - dropdown related
            $body.click(function(e) {
                $('.nav-dd .nav-item .wrapper-nav-sub').removeClass('is-shown');
                $('.nav-dd .nav-item .title').removeClass('is-selected');
            });

            $('.nav-dd .nav-item, .filterable-column .nav-item').click(function(e) {
                $subnav = $(this).find('.wrapper-nav-sub');
                $title = $(this).find('.title');

                if ($subnav.hasClass('is-shown')) {
                    $subnav.removeClass('is-shown');
                    $title.removeClass('is-selected');
                } else {
                    $('.nav-dd .nav-item .title').removeClass('is-selected');
                    $('.nav-dd .nav-item .wrapper-nav-sub').removeClass('is-shown');
                    $title.addClass('is-selected');
                    $subnav.addClass('is-shown');
            // if propagation is not stopped, the event will bubble up to the
            // body element, which will close the dropdown.
                    e.stopPropagation();
                }
            });

            // general link management - new window/tab
            $('a[rel="external"]:not([title])').attr('title', gettext('This link will open in a new browser window/tab'));
            $('a[rel="external"]').attr('target', '_blank');

            // general link management - lean modal window
            $('a[rel="modal"]').attr('title', gettext('This link will open in a modal window')).leanModal({
                overlay: 0.50,
                closeButton: '.action-modal-close'
            });
            $('.action-modal-close').click(function(e) {
                (e).preventDefault();
            });

            // general link management - smooth scrolling page links
            $('a[rel*="view"][href^="#"]').bind('click', smoothScrollLink);

            IframeUtils.iframeBinding();

            // disable ajax caching in IE so that backbone fetches work
            if ($.browser.msie) {
                $.ajaxSetup({cache: false});
            }

            // Initiate the edx tool kit dropdown menu
            if ($('.js-header-user-menu').length) {
                dropdownMenuView = new DropdownMenuView({
                    el: '.js-header-user-menu'
                });
                dropdownMenuView.postRender();
            }
        });

        function smoothScrollLink(e) {
            (e).preventDefault();

            $.smoothScroll({
                offset: -200,
                easing: 'swing',
                speed: 1000,
                scrollElement: null,
                scrollTarget: $(this).attr('href')
            });
        }

        function smoothScrollTop(e) {
            (e).preventDefault();

            $.smoothScroll({
                offset: -200,
                easing: 'swing',
                speed: 1000,
                scrollElement: null,
                scrollTarget: $('#view-top')
            });
        }

        function hideNotification(e) {
            (e).preventDefault();
            $(this).closest('.wrapper-notification').removeClass('is-shown').addClass('is-hiding').attr('aria-hidden', 'true');
        }

        function hideAlert(e) {
            (e).preventDefault();
            $(this).closest('.wrapper-alert').removeClass('is-shown');
        }
    }); // end require()