用ref 设置响应式对象

JS中设置对象

import { ref } from "vue";
var user = ref({
  username: "Wellington",
  age: 18,
});

调用方法

function setUserAge() {
  user.value.age = 14;
  console.log(user);
}

在视图页面显示

  <h1>用户名{{ user.username }}</h1>
  <h1>年龄{{ user.age }}</h1>
  <button @click="setUserAge">点击修改年龄</button>

显示结果
点击按钮后，年龄从18变成14，但是user.value.age的写法比较麻烦

用reactive 设置响应式对象

reactive 能进行响应式转换可以解包ref
JS中设置对象

import { ref,reactive } from "vue";
const teacher = reactive({
  username: "Wellington",
  type: "帅呆了",
});

调用方法

function setTeacherName() {
  teacher.username = "老王";
}

在视图页面显示

  <h1>老师：{{ teacher.username }}</h1>
  <button @click="setTeacherName">修改名字</button>

显示结果

整体源代码：

<template>
  <h1>用户名{{ user.username }}</h1>
  <h1>年龄{{ user.age }}</h1>
  <button @click="setUserAge">点击修改年龄</button>

  <h1>老师：{{ teacher.username }}</h1>
  <button @click="setTeacherName">修改名字</button>

  <h1>用户名{{ user2.username }}</h1>
  <h1>年龄{{ user2.age }}</h1>
  <button @click="setUser2Age">点击修改年龄</button>
</template>

<script setup>
import { ref, reactive } from "vue";
var user = ref({
  username: "Wellington",
  age: 18,
});

const teacher = reactive({
  username: "Wellington",
  type: "帅呆了",
});

function setUserAge() {
  user.value.age = 14;
  console.log(user);
}

function setTeacherName() {
  teacher.username = "老王";
}

let user2 = reactive(user.value);
function setUser2Age() {
  user2.age = 100;
}
</script>

总结

ref和reactive都可以实现响应式对象，但是实际开发中，reactive要简洁