Issue boards blank state template in JS file

Aim to eventually go to vue files

app/assets/javascripts/boards/components/board.js

@@ -2,7 +2,8 @@
 /* global Vue */
 /* global Sortable */
 
-require('./board_blank_state');
+import boardBlankState from './board_blank_state';
+
 require('./board_delete');
 require('./board_list');
 
@@ -17,7 +18,7 @@ require('./board_list');
     components: {
       'board-list': gl.issueBoards.BoardList,
       'board-delete': gl.issueBoards.BoardDelete,
-      'board-blank-state': gl.issueBoards.BoardBlankState
+      boardBlankState,
     },
     props: {
       list: Object,

app/assets/javascripts/boards/components/board_blank_state.js

-/* eslint-disable space-before-function-paren, comma-dangle */
-/* global Vue */
 /* global ListLabel */
+const Store = gl.issueBoards.BoardsStore;
 
-(() => {
-  const Store = gl.issueBoards.BoardsStore;
-
-  window.gl = window.gl || {};
-  window.gl.issueBoards = window.gl.issueBoards || {};
-
-  gl.issueBoards.BoardBlankState = Vue.extend({
-    data () {
+export default {
+  template: `
+    <div class="board-blank-state">
+      <p>
+        Add the following default lists to your Issue Board with one click:
+      </p>
+      <ul class="board-blank-state-list">
+        <li v-for="label in predefinedLabels">
+          <span
+            class="label-color"
+            :style="{ backgroundColor: label.color }">
+          </span>
+          {{ label.title }}
+        </li>
+      </ul>
+      <p>
+        Starting out with the default set of lists will get you right on the way to making the most of your board.
+      </p>
+      <button
+        class="btn btn-create btn-inverted btn-block"
+        type="button"
+        @click.stop="addDefaultLists">
+        Add default lists
+      </button>
+      <button
+        class="btn btn-default btn-block"
+        type="button"
+        @click.stop="clearBlankState">
+        Nevermind, I'll use my own
+      </button>
+    </div>
+  `,
+  data() {
     return {
       predefinedLabels: [
         new ListLabel({ title: 'To Do', color: '#F0AD4E' }),
-          new ListLabel({ title: 'Doing', color: '#5CB85C' })
-        ]
+        new ListLabel({ title: 'Doing', color: '#5CB85C' }),
+      ],
     };
   },
   methods: {
-      addDefaultLists () {
+    addDefaultLists() {
       this.clearBlankState();
 
       this.predefinedLabels.forEach((label, i) => {
@@ -28,8 +52,8 @@
           list_type: 'label',
           label: {
             title: label.title,
-              color: label.color
-            }
+            color: label.color,
+          },
         });
       });
 
@@ -47,7 +71,6 @@
           });
         });
     },
-      clearBlankState: Store.removeBlankState.bind(Store)
-    }
-  });
-})();
+    clearBlankState: Store.removeBlankState.bind(Store),
+  },
+};

app/views/projects/boards/components/_blank_state.html.haml

-%board-blank-state{ "inline-template" => true,
-  "v-if" => 'list.id == "blank"' }
-  .board-blank-state
-    %p
-      Add the following default lists to your Issue Board with one click:
-    %ul.board-blank-state-list
-      %li{ "v-for" => "label in predefinedLabels" }
-        %span.label-color{ ":style" =>  "{ backgroundColor: label.color } " }
-        {{ label.title }}
-    %p
-      Starting out with the default set of lists will get you right on the way to making the most of your board.
-    %button.btn.btn-create.btn-inverted.btn-block{ type: "button", "@click.stop" => "addDefaultLists" }
-      Add default lists
-    %button.btn.btn-default.btn-block{ type: "button", "@click.stop" => "clearBlankState" }
-      Nevermind, I'll use my own

app/views/projects/boards/components/_board.html.haml

@@ -32,4 +32,4 @@
       ":root-path" => "rootPath",
       "ref" => "board-list" }
     - if can?(current_user, :admin_list, @project)
-      = render "projects/boards/components/blank_state"
+      %board-blank-state{ "v-if" => 'list.id == "blank"' }