JSFiddle - React, Tailwind, and code Playground

HTML

<script src="https://unpkg.com/vue/dist/vue.js"></script>

<div id="app">
  <h1>
  </h1>
</div>

JavaScript

new Vue({
	el: '#app',
  data: {
		firstName: 'Marco',
    lastName: 'Oliveira'
  },
  methods:{
   getfullName: function(){
   	this.firstName + ' ' + this.lastName
   }
  
  }
});