JSFiddle - React, Tailwind, and code Playground

HTML

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

<div id="app">
  <h1>Hello bus!</h1>
  <p>{{i}}</p>
  <my-demo />
</div>

CSS

.router-link-active {
  color: red;
}

Babel + JSX

const bus = new Vue({
	data () {
  	return {
  		val: {
      	result: 0
      }
    }
  },
  created () {
  	this.$on('update1', val => {
    	this.val.result = val
    })
  }
})
const Demo1 = Vue.component('MyDemo', {
	template: `<div>
  <h1>demo1</h1>
  <div>data中获取直接修改值：{{dataResult}}</div>
  <div>data中获取修改值的父层：{{dataVal}}</div>
  <div>computed中依赖直接修改值：{{computedResult}}</div>
  </div>`,
  data () {
  	return {
  		dataResult: bus.val.result,
      dataVal: bus.val
    }
  },
  computed: {
  	 computedResult() {
    	return bus.val.result
    }
  }
})

// app
const app = new Vue({
	data () {
    return {
    	i: 0
    }
  },
  created () {
    setInterval(() => {
    	bus.$emit('update1', this.i++)
    }, 100)
  }
}).$mount('#app')