event

hello/index.html

@@ -30,6 +30,8 @@
             <input v-model="message"> <span>{{ lenMessage }}</span>
 
             <p class="static" v-bind:class="{ active: isActive, 'text-danger': hasError }">class</p>
+
+            <button v-on:click="counter += 1">{{ counter }} clics</button>
         </div>
         
         <script src="app.js"></script>