diff --git a/.prettierrc.yml b/.prettierrc.yml
index 356bb43..6a46fe4 100644
--- a/.prettierrc.yml
+++ b/.prettierrc.yml
@@ -1,4 +1,4 @@
-trailingComma: "none"
-tabWidth: 4
+trailingComma: 'none'
+tabWidth: 2
 semi: false
 singleQuote: true
diff --git a/src/App.vue b/src/App.vue
index 7df31b0..59f7133 100644
--- a/src/App.vue
+++ b/src/App.vue
@@ -1,32 +1,29 @@
 <template>
-    <img alt="Vue logo" src="./assets/logo.png" width="150" />
-    <HelloWorld :msg="title" />
-    <HelloWorldSfc :msg="title" />
-    <br />
+  <img alt="Vue logo" src="./assets/logo.png" width="150" />
+  <HelloWorld :msg="title" />
+  <footer style="margin-top: 2em">
     AGPLv3 :
     <a :href="origin" alt="origin">
-        {{ version }}
+      {{ version }}
     </a>
+  </footer>
 </template>
 
 <script lang="ts">
-/* standard composition api */
 /* eslint-disable no-undef */
 
 import HelloWorld from './components/HelloWorld.vue'
-import HelloWorldSfc from './components/HelloWorldSfc.vue'
 export default {
-    name: 'App',
-    components: {
-        HelloWorld,
-        HelloWorldSfc
-    },
-    setup() {
-        return {
-            title: APP_TITLE,
-            version: APP_VERSION,
-            origin: APP_ORIGIN
-        }
+  name: 'App',
+  components: {
+    HelloWorld
+  },
+  setup() {
+    return {
+      title: APP_TITLE,
+      version: APP_VERSION,
+      origin: APP_ORIGIN
     }
+  }
 }
 </script>
diff --git a/src/components/HelloWorld.vue b/src/components/HelloWorld.vue
index dd5c09a..751dae5 100644
--- a/src/components/HelloWorld.vue
+++ b/src/components/HelloWorld.vue
@@ -7,26 +7,25 @@
 
 <script lang="ts">
 /* standard composition api */
-
-import { ref } from "vue";
+import { ref } from 'vue'
 
 export default {
   props: {
     msg: {
       type: String,
-      required: true,
-    },
+      required: true
+    }
   },
   setup() {
     return {
-      count: ref(1),
-    };
+      count: ref(1)
+    }
   },
   methods: {
     inc() {
-      console.log("increment count");
-      this.count++;
-    },
-  },
-};
+      console.log('increment count')
+      this.count++
+    }
+  }
+}
 </script>
diff --git a/src/components/HelloWorldSfc.vue b/src/components/HelloWorldSfc.vue
deleted file mode 100644
index 63e6576..0000000
--- a/src/components/HelloWorldSfc.vue
+++ /dev/null
@@ -1,36 +0,0 @@
-<template>
-  <h1>{{ msg }}</h1>
-  <button @click="count++">
-    count is: {{ count }}
-  </button>
-  <button @click="inc">
-    inc
-  </button>
-  <p>Hello World!</p>
-</template>
-
-<script lang="ts">
-/* standard composition api */
-
-import { ref } from 'vue'
-
-export default {
-  props: {
-       msg: {
-      type: String,
-      required: true
-    }
-  },
-  setup() {
-    return {
-        count: ref(1)
-    }
-  },
-  methods: {
-    inc() {
-      console.log("increment count");
-      this.count++;
-    },
-  },
-};
-</script>