一文带你从零开始搭建vue3项目

import { createRouter, createWebHistory } from 'vue-router'
const routes = [
// ...
]

export default createRouter({
history: createWebHistory(),
routes,
})

// ...+
import router from './router/index'
createApp(App).use(router).mount('#app')

// @import './a.scss'; 
// 作为出口组织这些样式文件，同时编写一些全局样式

import '@/styles/index.scss'

// main.js
import element3 from "element3";
import "element3/lib/theme-chalk/index.css";
createApp(App).use(router).use(element3).mount('#app')

// 按需引入 plugins/element3.js
import { ElButton, ElMenu, ElMenuItem } from 'element3'
import 'element3/lib/theme-chalk/button.css'
import 'element3/lib/theme-chalk/menu.css'
import 'element3/lib/theme-chalk/menu-item.css'
export default function (app) {  
    app.use(ElButton) 
    app.use(ElMenu) 
    app.use(ElMenuItem)
}
// main.js中引用
import element3 from '@/plugins/element3.js'
createApp(App).use(router).use(element3).mount('#app')

// src/layout/index.vue
<template>
   <!-- 顶部导航 -->
  <Navbar />
  <!-- 页面内容部分、路由出口 -->
  <AppMain />
  <!-- 底部内容 -->
  <Footer />
</template>

<script setup>
import Navbar from './Navbar.vue'
import AppMain from './AppMain.vue'
import Footer from './Footer.vue'
</script>

// src/router/index.js
import { createRouter, createWebHistory } from 'vue-router'
import Layout from '@/layout/index.vue'
import Home from '@/views/home/Home.vue'
import Test from '@/views/test/Test.vue'
const routes = [
  {
    path: '/',
    component: Layout,
    children: [{ path: '', component: Home }],
  },
  {
    path: '/test',
    component: Layout,
    children: [{ path: '', component: Test }],
  },
]

export default createRouter({
  history: createWebHistory(),
  routes,
})

import axios from 'axios'
// 可以导入element plus 的弹出框代替alert进行交互操作

// create an axios instance
const service = axios.create({
  baseURL: import.meta.env.VITE_APP_BASEURL, // 使用设置好的全局环境
  timeout: 30 * 1000, // request timeout
})

// request interceptor
service.interceptors.request.use(
  (config) => {
    // 此处可以执行处理添加token等逻辑
    // config.headers["Authorization"] = getToken();
    return config
  },
  (error) => {
    console.log(error)
    return Promise.reject(error)
  }
)

// response interceptor
service.interceptors.response.use(
  (response) => {
    const res = response.data // 根据接口返回参数自行处理

    if (res.code !== 200) {
      if (res.code === 50000) {
        // 根据状态码自行处理
        alert('服务器内部出现异常，请稍后再试')
      }
      return Promise.reject(new Error(res.msg || 'Error'))
    } else {
      // 调用成功返回数据
      return Promise.resolve(res)
    }
  },
  (error) => {
    console.log('err' + error) // 出现异常的处理
    return Promise.reject(error)
  }
)

export default service

// 引入封装好的 request.js
import request from '@/utils/request'

export function getList(query) {
  return request({
    url: '/list',
    method: 'get',
    params: query,
  })
}

<script setup>
import { getList } from '@/api/home.js'
const query = { pagenum: 1 }
getList(query)
  .then((res) => {
    console.log(res) // 调用成功返回的数据
  })
  .error((err) => {
    console.log(err) // 调用失败要执行的逻辑
  })
</script>

# .env.production
VITE_APP_BASEURL=https://www.prod.api/

# .env.development
VITE_APP_BASEURL=https://www.test.api/

# .env.staging
VITE_APP_BASEURL=https://www.test.api/

console.log(import.meta.env.VITE_APP_BASEURL)
// 在不同编译环境下控制台会输出不同的url路径

  "scripts": {
    "dev": "vite",
    "build:stage": "vite build --mode staging",
    "build:prod": "vite build --mode production",
    "serve": "vite preview"
  },

import { defineConfig } from 'vite'
import vue from '@vitejs/plugin-vue'
import { resolve } from 'path'

// https://vitejs.dev/config/
export default defineConfig({
  plugins: [vue()],
  resolve: {
    alias: [{ find: '@', replacement: resolve(__dirname, 'src') }],
  },
  base: './',
})