Init zenmode in snippets pages

app/assets/javascripts/dispatcher.js

@@ -298,18 +298,21 @@ import ProjectVariables from './project_variables';
           break;
         case 'projects:snippets:show':
           initNotes();
+          new ZenMode();
           break;
         case 'projects:snippets:new':
         case 'projects:snippets:edit':
         case 'projects:snippets:create':
         case 'projects:snippets:update':
           new GLForm($('.snippet-form'), true);
+          new ZenMode();
           break;
         case 'snippets:new':
         case 'snippets:edit':
         case 'snippets:create':
         case 'snippets:update':
           new GLForm($('.snippet-form'), false);
+          new ZenMode();
           break;
         case 'projects:releases:edit':
           new ZenMode();
@@ -546,6 +549,7 @@ import ProjectVariables from './project_variables';
           new LineHighlighter();
           new BlobViewer();
           initNotes();
+          new ZenMode();
           break;
         case 'import:fogbugz:new_user_map':
           new UsersSelect();

app/views/projects/_md_preview.html.haml

@@ -25,7 +25,7 @@
         = markdown_toolbar_button({ icon: "list-bulleted", data: { "md-tag" => "* ", "md-prepend" => true }, title: "Add a bullet list" })
         = markdown_toolbar_button({ icon: "list-numbered", data: { "md-tag" => "1. ", "md-prepend" => true }, title: "Add a numbered list" })
         = markdown_toolbar_button({ icon: "task-done", data: { "md-tag" => "* [ ] ", "md-prepend" => true }, title: "Add a task list" })
-        %button.toolbar-btn.toolbar-fullscreen-btn.js-zen-enter.has-tooltip{ type: "button", tabindex: -1, aria: { label: "Go full screen" }, title: "Go full screen", data: { container: "body" } }
+        %button.toolbar-btn.toolbar-fullscreen-btn.js-zen-enter.has-tooltip{ type: "button", tabindex: -1, "aria-label": "Go full screen", title: "Go full screen", data: { container: "body" } }
           = sprite_icon("screen-full")
 
   .md-write-holder

changelogs/unreleased/40508-snippets-zen-mode.yml

+---
+title: Init zen mode in snippets pages
+merge_request:
+author:
+type: fixed

spec/features/projects/snippets_spec.rb

@@ -39,6 +39,11 @@ describe 'Project snippets', :js do
 
         expect(page).to have_selector('.atwho-view')
       end
+
+      it 'should have zen mode' do
+        find('.js-zen-enter').click()
+        expect(page).to have_selector('.fullscreen')
+      end
     end
   end
 end