<template><h4>当前求和为:{
{sum}}</h4><button@click="sum++">点我++</button><hr><h2>姓名:{
{name}}</h2><h2>年龄:{
{age}}</h2><h2>薪资:{
{job.j1.salary}}K</h2><button@click="name+='~'">修改姓名</button><button@click="age++">增长年龄</button><button@click="job.j1.salary++">涨薪</button></template><script>import{
ref,reactive,toRefs,readonly,shallowReadonly}from'vue'exportdefault{
name:'Demo',setup(){
//数据let sum =ref(0)let person =reactive({
name:'张三',
age:18,
job:{
j1:{
salary:20}}})
person =readonly(person)// person = shallowReadonly(person)// sum = readonly(sum)// sum = shallowReadonly(sum)//返回一个对象(常用)return{
sum,...toRefs(person)}}}</script>