JSFiddle - React, Tailwind, and code Playground

HTML

<div id="app">
  <my-component v-model="msg"></my-component>
  msg: {{msg}}
  <my-counter v-model="num"></my-counter>
  num: {{num}}
</div>

JavaScript

Vue.component('my-component', {
  template: `<div>
  <input type="text" :value="currentValue" @input="handleInput"/>
  </div>`,
  data: function () {
    return {
      currentValue: this.value
    }
  },
  props: ['value'], //接收一个 value prop
  methods: {
    handleInput(event) {
      var value = event.target.value;
      this.$emit('input', value); //触发 input 事件，并传入新值
    }
  }
});
Vue.component("my-counter", {
  template: `<div>
  <h1>{{value}}</h1>
  <button @click="plus">+</button>
  <button @click="minu">-</button>
  </div>`,
  props: {
    value: Number //接收一个 value prop
  },
  data: function() {
    return {
      val: this.value
    }
  },
  methods: {
    plus() {
      this.val = this.val + 1
      this.$emit('input', this.val) //触发 input 事件，并传入新值
    },
    minu() {
      if(this.val>0){
        this.val = this.val-1
        this.$emit('input', this.val) //触发 input 事件，并传入新值
      }
    }
  }
});
new Vue({
	el: '#app',
  data: {
  	msg: 'hello world',
    num: 0
  }
})