add a possible solution for the counter

basics-03-events-starting-code/index.html

@@ -17,8 +17,8 @@
     </header>
     <section id="events">
         <h2>Events in Action</h2>
-        <button>Add</button>
-        <button>Reduce</button>
+        <button v-on:click="counter++">Add</button>
+        <button v-on:click="counter--">Reduce</button>
         <p>Result: {{ counter }}</p>
     </section>
 </body>