diff --git a/src/views/tree/TreeTemplatingDemo.vue b/src/views/tree/TreeTemplatingDemo.vue
index 393dd219d..bdde0fbe6 100644
--- a/src/views/tree/TreeTemplatingDemo.vue
+++ b/src/views/tree/TreeTemplatingDemo.vue
@@ -35,20 +35,20 @@ export default {
                     key: '0',
                     label: 'Introduction',
                     children: [
-                        {label: 'What is Vue.js?', data:'https://vuejs.org/v2/guide/#What-is-Vue-js', type: 'url'},
-                        {label: 'Getting Started', data: 'https://vuejs.org/v2/guide/#Getting-Started', type: 'url'},
-                        {label: 'Declarative Rendering', data:'https://vuejs.org/v2/guide/#Declarative-Rendering', type: 'url'},
-                        {label: 'Conditionals and Loops', data: 'https://vuejs.org/v2/guide/#Conditionals-and-Loops', type: 'url'}
+                        {key: '0-0', label: 'What is Vue.js?', data:'https://vuejs.org/v2/guide/#What-is-Vue-js', type: 'url'},
+                        {key: '0-1', label: 'Getting Started', data: 'https://vuejs.org/v2/guide/#Getting-Started', type: 'url'},
+                        {key: '0-2', label: 'Declarative Rendering', data:'https://vuejs.org/v2/guide/#Declarative-Rendering', type: 'url'},
+                        {key: '0-3', label: 'Conditionals and Loops', data: 'https://vuejs.org/v2/guide/#Conditionals-and-Loops', type: 'url'}
                     ]
                 },
                 {
                     key: '1',
                     label: 'Components In-Depth',
                     children: [
-                        {label: 'Component Registration', data: 'https://vuejs.org/v2/guide/components-registration.html', type: 'url'},
-                        {label: 'Props', data: 'https://vuejs.org/v2/guide/components-props.html', type: 'url'},
-                        {label: 'Custom Events', data: 'https://vuejs.org/v2/guide/components-custom-events.html', type: 'url'},
-                        {label: 'Slots', data: 'https://vuejs.org/v2/guide/components-slots.html', type: 'url'}
+                        {key: '1-0', label: 'Component Registration', data: 'https://vuejs.org/v2/guide/components-registration.html', type: 'url'},
+                        {key: '1-1', llabel: 'Props', data: 'https://vuejs.org/v2/guide/components-props.html', type: 'url'},
+                        {key: '1-2', llabel: 'Custom Events', data: 'https://vuejs.org/v2/guide/components-custom-events.html', type: 'url'},
+                        {key: '1-3', llabel: 'Slots', data: 'https://vuejs.org/v2/guide/components-slots.html', type: 'url'}
                     ]
                 }
             ]