方法一  watch监听

父组件

    //其中workOrder 是我们本次要监听的字段
      <listForm
        ref="listFormRef"
        v-if="listFormShow"
        @listData="listDataEvent"
        :workOrder="workOrderValue"
      />

 子组件

//引入watchEffect 
import {
  ref,
  watch,
} from "vue";

const props = defineProps({
  workOrder: ''
})

watch(()=>props.workOrder,(newValue,oldValue)=>{
	console.log('workOrder变化了',newValue,oldValue)
},{immediate:true,deep:true})

方法二  watchEffect方法

父组件

    //其中workOrder 是我们本次要监听的字段
      <listForm
        ref="listFormRef"
        v-if="listFormShow"
        @listData="listDataEvent"
        :workOrder="workOrderValue"
      />

子组件

//引入watchEffect 
import {
  ref,
  watchEffect,
} from "vue";

const props = defineProps({
  workOrder: ''
})

watchEffect(()=>{
    const x1 =  props.workOrder
    console.log(x1,'watchEffect配置的回调执行了')
})

vue3详细内容请看这个链接

https://blog.csdn.net/m0_58266149/article/details/129945094?spm=1001.2014.3001.5501