vue3.0的ref， reactive，torefs

reactive是用于复杂数据类型。

可以直接用引用进行赋值， 如果使用到了ref响应式就需要变量.value进行赋值。

torefs是因为把reactive的值转成ref型，如果不转就不能响应式。

<template>
  <!-- <img alt="Vue logo" src="./assets/logo.png"> -->
  <div>
    <h1>{{ name }}</h1>
    <h1>{{ age }}</h1>
    <button @click="sayName">按钮</button>
  </div>
</template>

<script lang="ts">
import { computed, reactive,toRefs } from "vue";

interface DataProps {
  name: string;
  now: number;
  birthYear: number;
  age: number;
  sayName: () => void;
}

export default {
  name: "App",
  setup() {
   

    const data: DataProps = reactive({
      name: "zhangsan",
      birthYear: 2000,
      now: 2020,
      sayName: () => {
        console.log(1111);
        console.log(data.name);
        
        data.name = "I am " + data.name;
        console.log(data.name);
      },
      age: computed(() => {
        return data.now - data.birthYear;
      }),
    });

    const refData = toRefs(data)
    refData.age
    return {
      ...refData,
    };
  },
};
</script>

<style>
#app {
  font-family: Avenir, Helvetica, Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-align: center;
  color: #2c3e50;
  margin-top: 60px;
}
</style>

详情：https://blog.csdn.net/weixin_43342105/article/details/110233333