vue3使用customRef实现防抖

<template>
  <div>
    <input type="text" v-model="msg">
    <div>{{msg}}</div>
  </div>
</template>

<script>

import {ref,customRef} from "vue"
export default {
  setup(){
    // let  msg=ref('zql')
    function myRef(value,time=500){
      let timer = null
      return customRef((track,trigger)=>{
        return {
          get:function(){
            track()
            return value
          },
          set:function(newValue){
            clearTimeout(timer)
            timer = setTimeout(()=>{
              value = newValue
              trigger()
            },time)
          }
        }
      })
    }
    let  msg=myRef('zql')

    return{
      msg
    }
  }
}
</script>

<style>

</style>