Uniapp abnormality in assembly pass value (using Watch Method)

 After a parent component sub-assembly to pass a parameter value encountered a problem:

I pass an ID value to the parent component sub-assemblies, subassemblies but after receiving a print created by passing over the life cycle of the life cycle or mounted values ​​are random values, I have not passed over,

The reason is: the front sub-assembly have ID values, and the parent pass over after assembly.

code show as below

 父组件
<template>
    <view>
       <aaa :id='id'></aaa>  
    </view>
</template>
  
<script>
　　data(){
　　　　return{
　　　　　　id:19754
　　　　}
　　},
　　onload(){

　　　　console.log(''id',this.id)

　　},

   method:{
     　　 
  }
</script>


子组件
<template>
    <view>
      {{id}}
    </view>
</template>
  
<script>
　　props:['id'],
　　data(){},
　　mounted(){
　　console.log ( 
 　},, this.idid)'id'
    method: {
     　　  
    } 
</ Script> 

 Solution: 
fields to monitor passed over by the Watch: the assignment of this field to a new field 
<Template> 
    <View> 
      {{NEWID}} 
    </ View> 
</ Template> 
  
<Script> 
　　The props: [ 'ID' ], 
　　Data () { 
　　　　return { 
　　　　　　NEWID: '' 
　　　　} 
　　}, 
　　Mounted () { 
　　the console.log ( 'ID' , this.idid) 
 　}, 
　　Watch: { 
　　　　ID: fuction () { 
　　　　　　the this. = this.id NEWID 
　　　　}　　
　　　　the console.log (this.newID) 
　　}, 
    Method: { 
     　　 
    } 
</ Script>