vue中reactive了解一哈

在Vue3中创建响应数据有两种方式一种是ref，另一种就是reactive

reactive

首先在该组件引入

import { ref, reactive } from "vue";

<template>
  <div>
    <p>姓名：{{obj.name}}</p>
    <p>年龄：{{obj.age}}</p>
    <p v-for="(item,index) in obj.habby" :key="index">爱好{{index+1}}:{{item}}</p>
  </div>
</template>

<script>
import { reactive } from "vue";
export default {
  name: "App",
  setup() {
    let obj = reactive({
      name: "zjq",
      age: 18,
      habby: ["跳舞", "唱歌", "游泳"]
    });

    return {obj}
  }
};
</script>

<template>
  <div>
    <p>姓名：{{obj.name}}</p>
    <p>年龄：{{obj.age}}</p>   <button @click="ageFun">年龄加一</button>
    <p v-for="(item,index) in obj.habby" :key="index">爱好{{index+1}}:{{item}}</p>
  </div>
</template>

<script>
import { reactive } from "vue";
export default {
  name: "App",
  setup() {
    let obj = reactive({
      name: "zjq",
      age: 18,
      habby: ["跳舞", "唱歌", "游泳"]
    });
  function ageFun() {
    obj.age++
  }
    return {obj,ageFun}
  }
};
</script>

ref和reactive两个，ref的底层是reactive可以理解为
ref(0)==>>reactive({value:0})

  setup() {
    let num = ref(0)
    let num2 = reactive({value:0})
    console.log(num.value ===num2.value) //true
  }

代码整理：

<template>
  <div>
    <p>姓名：{{obj.name}}</p>
    <p>年龄：{{obj.age}}</p>
    <button @click="ageFun">年龄加一</button>
    <p v-for="(item,index) in obj.habby" :key="index">爱好{{index+1}}:{{item}}</p>
  </div>
</template>

<script>
import { ref, reactive } from "vue";
export default {
  name: "App",
  setup() {
    let num = ref(0);
    let num2 = reactive({value:0});
    console.log(num.value == num2.value);
    let { obj, ageFun } = reactiveF();
    return { obj, ageFun };
  }
};
function reactiveF() {
  let obj = reactive({
    name: "zjq",
    age: 18,
    habby: ["跳舞", "唱歌", "游泳"]
  });
  function ageFun() {
    obj.age++;
  }
  return { obj, ageFun };
}
</script>