概述
使用v-for遍历对象数组在真实的开发中也属于非常常见的用法,需要重点掌握。
因为目前流行的是前后端分离开发,在前后端分离开发中,最常需要处理的就是对象数组类型的数据了。
比如,将员工信息渲染到表格中。
这节课我们就来使用v-for渲染对象数组的方式实现一下这个案例。
基本用法
我们创建src/components/Demo20.vue,在这个组件中,我们要:
- 1:定义employees,表示员工对象数组,其中每个元素有id、name、age、gender、salary字段。
- 2:创建一个表格
- 3:在表格中使用v-for遍历employees并渲染
- 4:稍微用CSS样式美化一下表格
代码如下:
<script setup>
const employees = [{id: 1,name: "张三",age: 23,gender: "男",salary: 30000,},{id: 2,name: "李四",age: 23,gender: "男",salary: 28000,},{id: 3,name: "王五",age: 23,gender: "男",salary: 18000,},
]
</script>
<template><div><table><thead><tr><th>#</th><th>姓名</th><th>性别</th><th>年龄</th><th>薪资</th></tr></thead><tbody><tr v-for="(employee, index) in employees" :key="employee.id"><td>{{ index + 1 }}</td><td>{{ employee.name }}</td><td>{{ employee.gender }}</td><td>{{ employee.age }}</td><td>{{ employee.salary }}</td></tr></tbody></table></div>
</template>
<style>
table {width: 500px;text-align: center;border-collapse: collapse;
}tr, td, th {border: 1px solid #ccc;
}th, td {padding: 5px;
}
</style>
接着,我们修改src/App.vue,引入Demo20.vue并进行渲染:
<script setup>
import Demo from "./components/Demo20.vue"
</script>
<template><h1>欢迎跟着Python私教一起学习Vue3入门课程</h1><hr><Demo/>
</template>
然后,我们浏览器访问:http://localhost:5173/
完整代码
package.json
{"name": "hello","private": true,"version": "0.1.0","type": "module","scripts": {"dev": "vite","build": "vite build"},"dependencies": {"vue": "^3.3.8"},"devDependencies": {"@vitejs/plugin-vue": "^4.5.0","vite": "^5.0.0"}
}
vite.config.js
import { defineConfig } from 'vite'
import vue from '@vitejs/plugin-vue'export default defineConfig({plugins: [vue()],
})
index.html
<!doctype html>
<html lang="en"><head><meta charset="UTF-8" /><link rel="icon" type="image/svg+xml" href="/vite.svg" /><meta name="viewport" content="width=device-width, initial-scale=1.0" /><title>Vite + Vue</title></head><body><div id="app"></div><script type="module" src="/src/main.js"></script></body>
</html>
src/main.js
import { createApp } from 'vue'
import App from './App.vue'createApp(App).mount('#app')
src/App.vue
<script setup>
import Demo from "./components/Demo20.vue"
</script>
<template><h1>欢迎跟着Python私教一起学习Vue3入门课程</h1><hr><Demo/>
</template>
src/components/Demo20.vue
<script setup>
const employees = [{id: 1,name: "张三",age: 23,gender: "男",salary: 30000,},{id: 2,name: "李四",age: 23,gender: "男",salary: 28000,},{id: 3,name: "王五",age: 23,gender: "男",salary: 18000,},
]
</script>
<template><div><table><thead><tr><th>#</th><th>姓名</th><th>性别</th><th>年龄</th><th>薪资</th></tr></thead><tbody><tr v-for="(employee, index) in employees" :key="employee.id"><td>{{ index + 1 }}</td><td>{{ employee.name }}</td><td>{{ employee.gender }}</td><td>{{ employee.age }}</td><td>{{ employee.salary }}</td></tr></tbody></table></div>
</template>
<style>
table {width: 500px;text-align: center;border-collapse: collapse;
}tr, td, th {border: 1px solid #ccc;
}th, td {padding: 5px;
}
</style>
启动方式
yarn
yarn dev
浏览器访问:http://localhost:5173/