vue中使用props传值的方法

<template>
 <div>
  <input v-model="message">
  <child message="hello"></child>
 </div>
</template>
<script>
 import child from './components/child.vue'
 export default{
  components:{
   child
  }
 }
</script>

<template>
 <p>{{message}}</p>
</template>
<script>
 export default{
  props:['message'],
  data(){

  },
  methods:{
   fun:function(){

   }
  }
 }
</script>

<template>
 <div>
  <input v-model="message">
  <!--将childmessage与message通过v-bind指令绑定!-->
  <child v-bind:childmessage="message"></child>
 </div>
</template>
<script>
 import child from "./components/child.vue"
 export default{
  //构建child组件
  components:{
   child
  },
  data(){
   return {
    //初始化message
    message:''
   }
  }
 }
</script>

<template>
 <div>
  <p>childmessage is:{{childmessage}}</p>
 </div>
</template>
<script>
 export default{
  //将childmessage传递给child
  props:['childmessage']
 }
</script>