<template>
 <div id="app">
 这是一个空的app
 </div>
</template>

<script>
 export default {
 name : 'app'
 }
</script>

<style>

</style>

import Vue from 'vue'
import Router from 'vue-router'

Vue.use(Router)

export default new Router({
 routes: [
 {
  path: '/',
 }
 ]
})

<template>
 <div>
  <h3>这是子组件</h3>
  <p>{{content}}</p>
 </div>
</template>
<script>
export default {
 props : ['content']
}
</script>

<template>
 <div id="app">
 <child :content="msg"></child>
 </div>
</template>

<script>
 import child from './components/Child.vue';
 export default {
 name : 'app',
 data(){
  return {
  'msg' : '这是来自父组件的问候'
  }
 },
 components : {
  child
 }
 }
</script>

<template>
 <div id="app">
 <child :content="msg"></child>
 <child v-bind:content="msg"></child>
 </div>
</template>

<template>
 <div>
  <h3>这是子组件</h3>
  <p>{{content}}</p>
  <p>
   <input type="button" value="告诉父王一个消息" v-on:click="send">
  </p>
 </div>
</template>
<script>
export default {
 props : ['content'],
 methods : {
  send(){
   this.$emit( 'ParentRecEv', "父王,孩儿正在跟ghostwu学习vue2.0" )
  }
 }
}
</script>

<template>
 <div id="app">
 <child :content="msg"></child>
 <child v-bind:content="msg" v-on:ParentRecEv="showMsg"></child>
 <p>{{data}}</p>
 </div>
</template>

<script>
 import child from './components/Child.vue';
 export default {
 name : 'app',
 data(){
  return {
  'msg' : '这是来自父组件的问候',
  data : ''
  }
 },
 methods : {
  showMsg( msg ){
  this.data = msg;
  }
 },
 components : {
  child
 }
 }
</script>