一文带你了解Vue3中toRef和toRefs的用法
前端~ 人气:0toRef 顾名思义,不是ref 响应式数据,给它转成ref 响应式数据
通俗易懂的理解:
<template> <h3>姓名:{{ person.name }}</h3> <h3>年龄:{{ person.age }}</h3> <h3>薪资:{{ person.job.j1.salary }}</h3> <button @click="person.name += '!'">修改姓名</button> <button @click="person.age++">增长年龄</button> <button @click="person.job.j1.salary++">涨薪</button> </template> <script> import { reactive } from "vue"; export default { setup() { let person = reactive({ name: "张三", age: 18, job: { j1: { salary: 20, }, }, }); return { person, }; }, }; </script> <style> </style>
首先实现功能没问题,接下来考虑到代码优化:
那可能会想到 我在return的时候,麻烦一些,
return { name: person.name, age: person.age, job: person.job.j1.salary, };
但是,这样操作你会发现页面不是响应式的,数据修改页面不发生变化,如下:
接下来看 toRef的用法: 很明显实现了效果
<template> <h3>姓名:{{ name }}</h3> <h3>年龄:{{ age }}</h3> <h3>薪资:{{ salary }}</h3> <button @click="name += '!'">修改姓名</button> <button @click="age++">增长年龄</button> <button @click="salary++">涨薪</button> </template> <script> import { reactive, toRef } from "vue"; export default { setup() { let person = reactive({ name: "张三", age: 18, job: { j1: { salary: 20, }, }, }); return { name: toRef(person, "name"), age: toRef(person, "age"), salary: toRef(person.job.j1, "salary"), }; }, }; </script> <style> </style>
介绍完toRef的用法之后,接下来来看一下toRefs的用法吧
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