JSFiddle - React, Tailwind, and code Playground

HTML

<script src="https://cdnjs.cloudflare.com/ajax/libs/vue/2.2.6/vue.min.js"></script>
<div id="app">
  - {{token}} -
  <button @click="token++"> + </button>
</div>

JavaScript

new Vue({
	el: '#app',
  data: function() {
  	return {
    	world: 'world',
      get token() {
      	return localStorage.getItem('token') || 0;
      },
      set token(value) {
      	localStorage.setItem('token', value);
      }
    };
  }
});