JSFiddle - React, Tailwind, and code Playground

HTML

<script src="//unpkg.com/vue/dist/vue.js"></script>
<div id="app">
</div>

Babel + JSX

new Vue({
  el: '#app',
  template: `
  	<div>
    	<p>a: {{ a }}</p>
      <p>b: {{ b }}</p>
      <button @click="increment">+</button>
    </div>
  `,
  data () {
  	return {
    	a: 1
    }
  },
  computed: {
  	b () {
    	return this.a * 2
    }
  },
  watch: {
  	a () {
    	console.log('a is changed')
    }
  },
  methods: {
  	increment () {
    	this.a += 1
    }
  },
  created () {
  	console.log(this.watchers)
  }
})