Moved data attribute values into helper method

app/helpers/boards_helper.rb

+module BoardsHelper
+  def board_data
+    board = @board || @boards.first
+
+    {
+      endpoint: namespace_project_boards_path(@project.namespace, @project),
+      board_id: board.id,
+      disabled: !can?(current_user, :admin_list, @project),
+      issue_link_base: namespace_project_issues_path(@project.namespace, @project)
+    }
+  end
+end

app/views/projects/boards/index.html.haml

@@ -10,11 +10,7 @@
 = render 'shared/issuable/filter', type: :boards
-.boards-list#board-app{ "v-cloak" => true,
-  "data-endpoint" => "#{namespace_project_boards_path(@project.namespace, @project)}",
-  "data-board-id" => "#{@boards.first.id}",
-  "data-disabled" => "#{!can?(current_user, :admin_list, @project)}",
-  "data-issue-link-base" => "#{namespace_project_issues_path(@project.namespace, @project)}" }
+.boards-list#board-app{ "v-cloak" => true, data: board_data }
   .boards-app-loading.text-center{ "v-if" => "loading" }
     = icon("spinner spin")
   = render "projects/boards/components/board"

app/views/projects/boards/show.html.haml

@@ -10,11 +10,7 @@
 = render 'shared/issuable/filter', type: :boards
-.boards-list#board-app{ "v-cloak" => true,
-  "data-endpoint" => "#{namespace_project_boards_path(@project.namespace, @project)}",
-  "data-board-id" => "#{@board.id}",
-  "data-disabled" => "#{!can?(current_user, :admin_list, @project)}",
-  "data-issue-link-base" => "#{namespace_project_issues_path(@project.namespace, @project)}" }
+.boards-list#board-app{ "v-cloak" => true, data: board_data }
   .boards-app-loading.text-center{ "v-if" => "loading" }
     = icon("spinner spin")
   = render "projects/boards/components/board"