update readme

README.md

@@ -45,10 +45,13 @@ export default {
   },
   data() {
     return {
-      editor: new Editor({
+      editor: null,
+    }
+  },
+  mounted() {
+    this.editor = new Editor({
       content: '<p>Hi, I'm just a boring paragraph</p>',
     }),
-    }
   },
   beforeDestroy() {
     this.editor.destroy()