Entrepreneurship - Harvard Business School

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'.ua-mobile, .ua-tablet' ).length > 0) { this.maxHeight = 0; } else { this.maxHeight = 90; } } } StickyHeader.prototype.buildHeader = function() { var headerHeight = $(".page-header").height(); // Override for HBS online if($(".page-header").hasClass('page-header-online')) { headerHeight = 0; } this.appearsAt = $(".page-header").offset().top + headerHeight; this.sticky = $('<div id="sticky-header" style="height:0; top: -5px;"></div>'); this.stickyWrap = $('<div class="wrapper"></div>'); var container = $(".site-header").parents('.grid-framework'); $( '.universal-banner, .site-header' ).each( function( index, element ) { this.stickyWrap.append( $( element ).clone() ); $( element ).addClass( 'sticky-header-cloned' ); }.bind( this ) ); this.sticky.append(this.stickyWrap); $(".sticky-header-container").append(this.sticky); } StickyHeader.prototype.triggerDisappear = function(){ this.sticky.addClass('at-scroll-top'); this.isVisible = false; this.currentHeight = 0; this.sticky.css('height',this.currentHeight); $("body").removeClass("sticky-header-active"); $("body").removeClass('sticky-header-expanded'); } StickyHeader.prototype.triggerAppear = function(){ if ($("body").hasClass('slider-is-open')) return; this.isVisible = true; $("body").addClass("sticky-header-active"); } StickyHeader.prototype.triggerExpand = function(){ if (this.disabled) return; if ($("body").hasClass('slider-is-open')) return; if (this.currentHeight == this.maxHeight) return; this.sticky.css('height',this.maxHeight-1); this.currentHeight = this.maxHeight; $("body").addClass('sticky-header-expanded'); } StickyHeader.prototype.triggerShrink = function(){ if ($( '.ua-mobile, .ua-tablet' ).length == 0 || !$(".page-header").hasClass('page-header-online')) { this.sticky.removeClass('at-scroll-top'); } var self = this; window.requestAnimationFrame(function(){ var newHeight = 0; if (self.isVisible) { newHeight = self.minHeight; } if (self.currentHeight == newHeight) return; self.sticky.css('height',newHeight); self.currentHeight = newHeight; $("body").removeClass('sticky-header-expanded'); }) } StickyHeader.prototype.redraw = function() { // This is costly to performance but unavoidable //const pageY = window.scrollY; //This throws a syntax error in IE11. var pageY = window.pageYOffset; var scrollUp = pageY < this.lastScrollTop; var scrollDistance = pageY - this.lastScrollTop; this.velocitySamples.push(Math.abs(scrollDistance)); if (this.velocitySamples.length > 10) { this.velocitySamples.shift(); } var totalDistance = 0; for (var i = 0;i<this.velocitySamples.length;i++){ totalDistance += this.velocitySamples[i]; } var velocity = totalDistance / this.velocitySamples.length; var debugVars = {}; if (pageY != this.lastScrollTop) { debugVars.pageY = pageY; debugVars.minHeight = this.minHeight; debugVars.maxHeight = this.maxHeight; debugVars.appearsAt = this.appearsAt; debugVars.velocity = velocity; debugVars.disabled = this.disabled; var html = ''; $.each(debugVars,function(k,v){ html += '<div>' + k + ': '+v +'</div>'; }) this.debug.html(html); if (pageY >= this.appearsAt) { this.triggerAppear(); } if ($(".page-header").hasClass('page-header-online') && $('.table-of-contents-wrapper').length && $('.table-of-contents-wrapper.jump-to').length == 0){ var tocWrap = $('.table-of-contents-wrapper'); var toc = tocWrap.children('.table-of-contents'); var tocItems = toc.find('.toc-item'); var stickyHeight = this.maxHeight; if ((pageY + stickyHeight) > tocWrap.offset().top && !toc.hasClass('sticky')) { toc.addClass('sticky'); } else if ((pageY + stickyHeight) <= tocWrap.offset().top && toc.hasClass('sticky')) { toc.removeClass('sticky'); } if (toc.hasClass('sticky')) { tocItems.each(function( index ) { var section = $($(this).children("a.toc-jump").attr("href")); if (section.length) { var sectionTop = section.offset().top - 45; var pageHeight = pageY + stickyHeight + toc.height(); if ((pageHeight > sectionTop) && !$(this).hasClass('current')) { tocItems.removeClass('current'); $(this).addClass('current'); } else if ((pageHeight <= sectionTop) && $(this).hasClass('current')) { $(this).removeClass('current'); } } }); } } if (pageY <= 0) { this.triggerDisappear(); } else if (scrollUp) { console.log('scroll up'); if ($(".page-header").hasClass('page-header-online') && pageY < (this.appearsAt - this.maxHeight)) { this.triggerDisappear(); } else if (velocity > 5 || pageY < this.appearsAt) { this.triggerExpand(); } } else if (pageY > this.appearsAt) { // If HBS online and mobile hide the sticky header if ($(".page-header").hasClass('page-header-online') && $( '.ua-mobile, .ua-tablet' ).length > 0) { this.triggerDisappear(); } this.triggerShrink(); } this.lastScrollTop = pageY; } this.hasScrolled = false; }; var _domready = _domready || []; _domready.push(function(){ if (document.getElementById('wcm-react-root')) return; if (window.stickyHeaderDisabled) return; window.stickyHeader = new StickyHeader(); var _onScroll = function () { if (!window.stickyHeader.hasScrolled) { window.requestAnimationFrame(function(){ window.stickyHeader.redraw(); }); } window.stickyHeader.hasScrolled = true; window.requestAnimationFrame(_onScroll); }; _onScroll(); //without this, the header flickers on online window.setTimeout(function(){ _onScroll(); },250) $(document).on('delay-sticky-nav',function(){ window.stickyHeader.temporarilyDisabled(); }) // needed for facet pages http://www.hbs.edu/news/Pages/default.aspx $(document).on('click',".facetctrl-sticky.active",function(){ $(document).trigger('delay-sticky-nav'); }) $(document).on('click',".filter-sticky.fixed",function(){ $(document).trigger('delay-sticky-nav'); }) }); jQuery(function($){ $('.utility-menu li.has-submenu').each(function(){ var $menu = $(this); $menu.open = function(){ console.log('menu open'); $menu.addClass("open").attr('aria-expanded', "true"); $('.utility-menu li.has-submenu.open').each(function(){ if ($menu[0] !== this) { $(this).removeClass('open').attr('aria-expanded', "false"); } }) } $menu.close = function(){ if ($menu.hasClass('open')) { $menu.removeClass('open').attr('aria-expanded', "false"); } } $menu.on("mouseover", function(event){ $menu.open(); clearTimeout($menu.data('timer')); }); $menu.on("mouseout", function(event){ $menu.data('timer',setTimeout(function(event){ $menu.close(); console.log("mouseout"); }, 500)) }); $menu.on('click',' > a',function(){ var $link = $(this); var $parent = $link.parent() console.log($parent) if ($parent.hasClass('has-submenu') && $parent.hasClass('open') && $(this).hasClass('dropdown-link')) { $menu.close(); return true; } else if ($parent.hasClass('has-submenu') && !$parent.hasClass('open')) { console.log("menu open"); console.log($parent.hasClass('open')); $menu.open(); } else { console.log("menu closed"); console.log($parent.hasClass('open')); $menu.close(); } event.preventDefault(); return false; }) $menu.on('keyup', ' > div', function(event){ if (framework.accessibleClick(event) === true) { if ($(this).parent().hasClass('open')) { $menu.close(); } else { $menu.open(); } return false; } }); $menu.on('keypress', ' > div', function(event){ if (framework.accessibleClick(event) === true) { event.preventDefault(); } }); $("a",$menu).each(function(){ var $link = $(this); $link.on('focus',function(){ clearTimeout($menu.data('timer2')); }) $link.on('blur',function(){ clearTimeout($menu.data('timer2')); $menu.data('timer2',setTimeout(function(event){ $menu.close(); },100)); }) }) }) $(document).on('click', '.utility-menu [data-target]', function(e) { e.preventDefault(); var $utilSubmenu = $(this).parents('.has-submenu'); var utilSubmenuID = $utilSubmenu.attr('id'); var targetElem = $(this).data('target'); $.ajax({ url: $(this).attr('href'), type: 'GET', beforeSend: function() { if ($utilSubmenu.hasClass('open')) { $utilSubmenu.removeClass('open').attr('aria-expanded', "false"); } var minHeight = $('#' + targetElem).outerHeight(); $('#' + targetElem).replaceWith('<div class="loading-replace" style="min-height: ' + minHeight + 'px;">Loading...</div>'); }, success: function(data){ $utilSubmenu.html($(data).find('#' + utilSubmenuID).html()); $('.loading-replace').replaceWith($(data).find('#' + targetElem)); } }); }); }); </script>  <input type="text" name="__spDummyText1" style="display:none;" size="1"/> <input type="text" name="__spDummyText2" style="display:none;" size="1"/> </form> </body> </html>

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