JSFiddle - React, Tailwind, and code Playground

HTML

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

<div id="app">
  <h1>{{ getFullName() }}</h1>
</div>

JavaScript

new Vue({
	el: '#app',
  data: {
		firstName: 'Bo',
    lastName: 'Andersen'
  },
  methods: {
  	getFullName: function() {
    	return this.firstName+" "+this.lastName;
    }
  }
});