fixed

dist/app.js

@@ -25,9 +25,9 @@ import './components/footer.js'
 const app = createApp({
   render() {
     return html`
-      <wc-header></wc-header>
+      <v-header></v-header>
       <div class="main-body"><router-view></router-view></div>
-      <wc-footer></wc-footer>
+      <v-footer></v-footer>
     `
   },
 

dist/components/footer.js

@@ -32,4 +32,4 @@ class Footer extends Component {
   }
 }
 
-Footer.reg('footer')
+Footer.reg('footer', 'v')

dist/components/header.js

@@ -191,4 +191,4 @@ class Header extends Component {
   }
 }
 
-Header.reg('header')
+Header.reg('header', 'v')