fixed up JS to use a js-* class

fixed up Ruby based on review

app/assets/javascripts/breadcrumb.js

 export const addTooltipToEl = (el) => {
-  if (el.scrollWidth > el.offsetWidth) {
+  const textEl = el.querySelector('.js-breadcrumb-item-text');
+
+  if (textEl && textEl.scrollWidth > textEl.offsetWidth) {
     el.setAttribute('title', el.textContent);
     el.setAttribute('data-container', 'body');
     el.classList.add('has-tooltip');
@@ -7,10 +9,12 @@ export const addTooltipToEl = (el) => {
 };
 export default () => {
-  const breadcrumbs = document.querySelector('.breadcrumbs-list');
+  const breadcrumbs = document.querySelector('.js-breadcrumbs-list');
   if (breadcrumbs) {
-    const topLevelLinks = breadcrumbs.querySelectorAll('.breadcrumbs-list > li > a');
+    const topLevelLinks = [...breadcrumbs.children].filter(el => !el.classList.contains('dropdown'))
+      .map(el => el.querySelector('a'))
+      .filter(el => el);
     const $expander = $('.js-breadcrumbs-collapsed-expander');
     topLevelLinks.forEach(el => addTooltipToEl(el));

app/assets/stylesheets/new_nav.scss

@@ -365,7 +365,7 @@ header.navbar-gitlab-new {
   }
 }
-.breadcrumb-item-project-name {
+.breadcrumb-item-text {
   @include str-truncated(128px);
 }

app/helpers/breadcrumbs_helper.rb

@@ -25,15 +25,13 @@ module BreadcrumbsHelper
   def breadcrumb_list_item(link)
     content_tag "li" do
-      output = link
-      output << icon("angle-right", class: "breadcrumbs-list-angle")
-      output
+      link + icon("angle-right", class: "breadcrumbs-list-angle")
     end
   end
   def add_to_breadcrumb_dropdown(link, location: :before)
     @breadcrumb_dropdown_links ||= {}
-    @breadcrumb_dropdown_links[location] = [] unless @breadcrumb_dropdown_links[location]
+    @breadcrumb_dropdown_links[location] ||= []
     @breadcrumb_dropdown_links[location] << link
   end
 end

app/helpers/groups_helper.rb

@@ -36,7 +36,7 @@ module GroupsHelper
                   else
                     group_title_link(group)
                   end
-    full_title += ' · '.html_safe + link_to(simple_sanitize(name), url, class: 'group-path') if name
+    full_title += ' · '.html_safe + link_to(simple_sanitize(name), url, class: 'group-path breadcrumb-item-text js-breadcrumb-item-text') if name
     if show_new_nav?
       full_title.html_safe
@@ -84,7 +84,7 @@ module GroupsHelper
   private
   def group_title_link(group, hidable: false, show_avatar: false)
-    link_to(group_path(group), class: "group-path #{'hidable' if hidable}") do
+    link_to(group_path(group), class: "group-path breadcrumb-item-text js-breadcrumb-item-text #{'hidable' if hidable}") do
       output =
         if (show_new_nav? && group.try(:avatar_url) || (show_new_nav? && show_avatar)) && !Rails.env.test?
           image_tag(group_icon(group), class: "avatar-tile", width: 15, height: 15)

app/helpers/page_layout_helper.rb

@@ -80,10 +80,12 @@ module PageLayoutHelper
       @header_title     = title
       @header_title_url = title_url
     else
+      return @header_title unless @header_title_url
+
       if show_new_nav?
-        @header_title_url ? breadcrumb_list_item(link_to(@header_title, @header_title_url)) : @header_title
+        breadcrumb_list_item(link_to(@header_title, @header_title_url))
       else
-        @header_title_url ? link_to(@header_title, @header_title_url) : @header_title
+        link_to(@header_title, @header_title_url)
       end
     end
   end

app/helpers/projects_helper.rb

@@ -68,12 +68,12 @@ module ProjectsHelper
           ""
         end
-      output << content_tag("span", simple_sanitize(project.name), class: "breadcrumb-item-project-name")
+      output << content_tag("span", simple_sanitize(project.name), class: "breadcrumb-item-text js-breadcrumb-item-text")
       output.html_safe
     end
     if show_new_nav?
-      namespace_link = breadcrumb_list_item(namespace_link) if project.group.nil?
+      namespace_link = breadcrumb_list_item(namespace_link) unless project.group
       project_link = breadcrumb_list_item project_link
     end

app/helpers/wiki_helper.rb

@@ -17,7 +17,7 @@ module WikiHelper
     current_slug = ""
     page_slug_split
       .map do |dir_or_page|
-        current_slug = "#{current_slug}/#{dir_or_page}"
+        current_slug = "#{current_slug}#{dir_or_page}/"
         add_to_breadcrumb_dropdown link_to(WikiPage.unhyphenize(dir_or_page).capitalize, project_wiki_path(@project, current_slug)), location: :after
       end
   end

app/views/layouts/nav/_breadcrumbs.html.haml

@@ -8,7 +8,7 @@
         %span.sr-only Open sidebar
         = icon ('bars')
     .breadcrumbs-links.js-title-container
-      %ul.list-unstyled.breadcrumbs-list
+      %ul.list-unstyled.breadcrumbs-list.js-breadcrumbs-list
         - unless hide_top_links
           = header_title
         - if @breadcrumbs_extra_links

features/steps/explore/projects.rb

@@ -36,13 +36,13 @@ class Spinach::Features::ExploreProjects < Spinach::FeatureSteps
   end
   step 'I should see project "Community" home page' do
-    page.within '.breadcrumbs .breadcrumb-item-project-name' do
+    page.within '.breadcrumbs .breadcrumb-item-text' do
       expect(page).to have_content 'Community'
     end
   end
   step 'I should see project "Internal" home page' do
-    page.within '.breadcrumbs .breadcrumb-item-project-name' do
+    page.within '.breadcrumbs .breadcrumb-item-text' do
       expect(page).to have_content 'Internal'
     end
   end

features/steps/project/redirects.rb

@@ -18,7 +18,7 @@ class Spinach::Features::ProjectRedirects < Spinach::FeatureSteps
   step 'I should see project "Community" home page' do
     Gitlab.config.gitlab.should_receive(:host).and_return("www.example.com")
-    page.within '.breadcrumbs .breadcrumb-item-project-name' do
+    page.within '.breadcrumbs .breadcrumb-item-text' do
       expect(page).to have_content 'Community'
     end
   end