<template>
  <div class="person">
    <h1>情況一：監(jiān)視【ref】定義的【基本類型】數(shù)據(jù)</h1>
    <h2>當(dāng)前求和為：{{sum}}</h2>
    <button @click="changeSum">點(diǎn)我sum+1</button>
  </div>
</template>

<script lang="ts" setup name="Person">
  import {ref,watch} from 'vue'
  // 數(shù)據(jù)
  let sum = ref(0)
  // 方法
  function changeSum(){
    sum.value += 1
  }
  // 監(jiān)視，情況一：監(jiān)視【ref】定義的【基本類型】數(shù)據(jù)
  const stopWatch = watch(sum,(newValue,oldValue)=>{
    console.log('sum變化了',newValue,oldValue) //newValue是新的數(shù)據(jù)，oldvalue是舊的數(shù)據(jù)
    if(newValue >= 10){
      stopWatch()
    }
  })
</script>

<template>
  <div class="person">
    <h1>情況二：監(jiān)視【ref】定義的【對(duì)象類型】數(shù)據(jù)</h1>
    <h2>姓名：{{ person.name }}</h2>
    <h2>年齡：{{ person.age }}</h2>
    <button @click="changeName">修改名字</button>
    <button @click="changeAge">修改年齡</button>
    <button @click="changePerson">修改整個(gè)人</button>
  </div>
</template>

<script lang="ts" setup name="Person">
  import {ref,watch} from 'vue'
  // 數(shù)據(jù)
  let person = ref({
    name:'張三',
    age:18
  })
  // 方法
  function changeName(){
    person.value.name += '~'
  }
  function changeAge(){
    person.value.age += 1
  }
  function changePerson(){
    person.value = {name:'李四',age:90}
  }
  /* 
    監(jiān)視，情況一：監(jiān)視【ref】定義的【對(duì)象類型】數(shù)據(jù)，監(jiān)視的是對(duì)象的地址值，若想監(jiān)視對(duì)象內(nèi)部屬性的變化，需要手動(dòng)開啟深度監(jiān)視
    watch的第一個(gè)參數(shù)是：被監(jiān)視的數(shù)據(jù)
    watch的第二個(gè)參數(shù)是：監(jiān)視的回調(diào)
    watch的第三個(gè)參數(shù)是：配置對(duì)象（deep、immediate等等.....） 
  */
  watch(person,(newValue,oldValue)=>{
    console.log('person變化了',newValue,oldValue)
  },{deep:true})
  
</script>

<template>
  <div class="person">
    <h1>情況三：監(jiān)視【reactive】定義的【對(duì)象類型】數(shù)據(jù)</h1>
    <h2>姓名：{{ person.name }}</h2>
    <h2>年齡：{{ person.age }}</h2>
    <button @click="changeName">修改名字</button>
    <button @click="changeAge">修改年齡</button>
    <button @click="changePerson">修改整個(gè)人</button>
    <hr>
    <h2>測(cè)試：{{obj.a.b.c}}</h2>
    <button @click="test">修改obj.a.b.c</button>
  </div>
</template>

<script lang="ts" setup name="Person">
  import {reactive,watch} from 'vue'
  // 數(shù)據(jù)
  let person = reactive({
    name:'張三',
    age:18
  })
  let obj = reactive({
    a:{
      b:{
        c:666
      }
    }
  })
  // 方法
  function changeName(){
    person.name += '~'
  }
  function changeAge(){
    person.age += 1
  }
  function changePerson(){
    Object.assign(person,{name:'李四',age:80})
  }
  function test(){
    obj.a.b.c = 888
  }

  // 監(jiān)視，情況三：監(jiān)視【reactive】定義的【對(duì)象類型】數(shù)據(jù)，且默認(rèn)是開啟深度監(jiān)視的
  watch(person,(newValue,oldValue)=>{
    console.log('person變化了',newValue,oldValue)
  })
  watch(obj,(newValue,oldValue)=>{
    console.log('Obj變化了',newValue,oldValue)
  })
</script>

<template>
  <div class="person">
    <h1>情況四：監(jiān)視【ref】或【reactive】定義的【對(duì)象類型】數(shù)據(jù)中的某個(gè)屬性</h1>
    <h2>姓名：{{ person.name }}</h2>
    <h2>年齡：{{ person.age }}</h2>
    <h2>汽車：{{ person.car.c1 }}、{{ person.car.c2 }}</h2>
    <button @click="changeName">修改名字</button>
    <button @click="changeAge">修改年齡</button>
    <button @click="changeC1">修改第一臺(tái)車</button>
    <button @click="changeC2">修改第二臺(tái)車</button>
    <button @click="changeCar">修改整個(gè)車</button>
  </div>
</template>

<script lang="ts" setup name="Person">
  import {reactive,watch} from 'vue'

  // 數(shù)據(jù)
  let person = reactive({
    name:'張三',
    age:18,
    car:{
      c1:'奔馳',
      c2:'寶馬'
    }
  })
  // 方法
  function changeName(){
    person.name += '~'
  }
  function changeAge(){
    person.age += 1
  }
  function changeC1(){
    person.car.c1 = '奧迪'
  }
  function changeC2(){
    person.car.c2 = '大眾'
  }
  function changeCar(){
    person.car = {c1:'雅迪',c2:'愛瑪'}
  }

  // 監(jiān)視，情況四：監(jiān)視響應(yīng)式對(duì)象中的某個(gè)屬性，且該屬性是基本類型的，要寫成函數(shù)式
  /* watch(()=> person.name,(newValue,oldValue)=>{
    console.log('person.name變化了',newValue,oldValue)
  }) */

  // 監(jiān)視，情況四：監(jiān)視響應(yīng)式對(duì)象中的某個(gè)屬性，且該屬性是對(duì)象類型的，可以直接寫，也能寫函數(shù)，更推薦寫函數(shù)
  watch(()=>person.car,(newValue,oldValue)=>{
    console.log('person.car變化了',newValue,oldValue)
  },{deep:true})
</script>

<template>
  <div class="person">
    <h1>情況五：監(jiān)視上述的多個(gè)數(shù)據(jù)</h1>
    <h2>姓名：{{ person.name }}</h2>
    <h2>年齡：{{ person.age }}</h2>
    <h2>汽車：{{ person.car.c1 }}、{{ person.car.c2 }}</h2>
    <button @click="changeName">修改名字</button>
    <button @click="changeAge">修改年齡</button>
    <button @click="changeC1">修改第一臺(tái)車</button>
    <button @click="changeC2">修改第二臺(tái)車</button>
    <button @click="changeCar">修改整個(gè)車</button>
  </div>
</template>

<script lang="ts" setup name="Person">
  import {reactive,watch} from 'vue'

  // 數(shù)據(jù)
  let person = reactive({
    name:'張三',
    age:18,
    car:{
      c1:'奔馳',
      c2:'寶馬'
    }
  })
  // 方法
  function changeName(){
    person.name += '~'
  }
  function changeAge(){
    person.age += 1
  }
  function changeC1(){
    person.car.c1 = '奧迪'
  }
  function changeC2(){
    person.car.c2 = '大眾'
  }
  function changeCar(){
    person.car = {c1:'雅迪',c2:'愛瑪'}
  }

  // 監(jiān)視，情況五：監(jiān)視上述的多個(gè)數(shù)據(jù)
  watch([()=>person.name,person.car],(newValue,oldValue)=>{
    console.log('person.car變化了',newValue,oldValue)
  },{deep:true})

</script>