Method

index.html

<style>
    .button {
     color:rgb(4, 26, 9) !important;
         border-color: rgb(122, 153, 119) !important;
    }
    .button:hover{
         color: rgb(87, 129, 83) !important;
    }
    .button:active{
        color: #000 !important;
    }
</style>
<script src="https://unpkg.com/vue/dist/vue.js"></script>
<div id="app-2">
  <p>{{ message }}</p>
  <button class="button" v-on:click="reverseMessage">Ters Çevir</button>
</div>
  
<script>
var app5 = new Vue({
  el: '#app-2',
  data: {
    message: 'Bilgisayar Mühendisi'
  },
  methods: {
    reverseMessage: function () {
      this.message = this.message.split('').reverse().join('')
    }
  }
})
</script>