Vue3 + Vite + TypeScript + Element-Plus：从零到一构建企业级后台管理系统（前后端开源）(2)

<!-- src/components/HelloWorld.vue -->
<template>
  <div class="box" />
</template>
<style lang="scss" scoped>
.box {
  width: 100px;
  height: 100px;
  background-color: $bg-color;
}
</style>

// src/styles/variables.module.scss
// 导出 variables.scss 文件的变量
:export{
    bgColor:$bg-color
}

<!-- src/components/HelloWorld.vue -->
<script setup lang="ts">
  import variables from "@/styles/variables.module.scss";
  console.log(variables.bgColor)  
</script>
<template>
  <div style="width:100px;height:100px" :style="{ 'background-color': variables.bgColor }" />
</template>

npm install -D unocss

// vite.config.ts
import UnoCSS from 'unocss/vite'
export default {
  plugins: [
    UnoCSS({ /* options */ }),
  ],
}

// src/main.ts
import 'uno.css'

npm install pinia

// src/main.ts
import { createPinia } from "pinia";
import App from "./App.vue";
createApp(App).use(createPinia()).mount("#app");

// src/store/counter.ts
import { defineStore } from "pinia";
export const useCounterStore = defineStore("counter", () => {
  // ref变量 → state 属性
  const count = ref(0);
  // computed计算属性 → getters
  const double = computed(() => {
    return count.value * 2;
  });
  // function函数 → actions
  function increment() {
    count.value++;
  }
  return { count, double, increment };
});

<!-- src/App.vue -->
<script setup lang="ts">
import HelloWorld from "@/components/HelloWorld.vue";
import { useCounterStore } from "@/store/counter";
const counterStore = useCounterStore();
</script>
<template>
  <h1 class="text-3xl">vue3-element-admin-父组件</h1>
  <el-button type="primary" @click="counterStore.increment">count++</el-button>
  <HelloWorld />
</template>

<!-- src/components/HelloWorld.vue -->
<script setup lang="ts">
import { useCounterStore } from "@/store/counter";
const counterStore = useCounterStore();
</script>
<template>
  <el-card  class="text-left text-white border-white border-1 border-solid mt-10 bg-[#242424]" >
    <template #header> 子组件 HelloWorld.vue</template>
    <el-form>
      <el-form-item label="数字："> {{ counterStore.count }}</el-form-item>
      <el-form-item label="加倍："> {{ counterStore.double }}</el-form-item>
    </el-form>
  </el-card>
</template>

# 变量必须以 VITE_ 为前缀才能暴露给外部读取
VITE_APP_TITLE = 'vue3-element-admin'
VITE_APP_PORT = 3000
VITE_APP_BASE_API = '/dev-api'

VITE_APP_TITLE = 'vue3-element-admin'
VITE_APP_PORT = 3000
VITE_APP_BASE_API = '/prod-api'

// src/types/env.d.ts
interface ImportMetaEnv {
  /**
   * 应用标题
   */
  VITE_APP_TITLE: string;
  /**
   * 应用端口
   */
  VITE_APP_PORT: number;
  /**
   * API基础路径(反向代理)
   */
  VITE_APP_BASE_API: string;
}
interface ImportMeta {
  readonly env: ImportMetaEnv;
}

npm install axios

//  src/utils/request.ts
import axios, { InternalAxiosRequestConfig, AxiosResponse } from 'axios';
import { useUserStoreHook } from '@/store/modules/user';
// 创建 axios 实例
const service = axios.create({
  baseURL: import.meta.env.VITE_APP_BASE_API,
  timeout: 50000,
  headers: { 'Content-Type': 'application/json;charset=utf-8' }
});
// 请求拦截器
service.interceptors.request.use(
  (config: InternalAxiosRequestConfig) => {
    const userStore = useUserStoreHook();
    if (userStore.token) {
      config.headers.Authorization = userStore.token;
    }
    return config;
  },
  (error: any) => {
    return Promise.reject(error);
  }
);
// 响应拦截器
service.interceptors.response.use(
  (response: AxiosResponse) => {
    const { code, msg } = response.data;
    // 登录成功
    if (code === '00000') {
      return response.data;
    }
    ElMessage.error(msg || '系统出错');
    return Promise.reject(new Error(msg || 'Error'));
  },
  (error: any) => {
    if (error.response.data) {
      const { code, msg } = error.response.data;
      // token 过期，跳转登录页
      if (code === 'A0230') {
        ElMessageBox.confirm('当前页面已失效，请重新登录', '提示', {
          confirmButtonText: '确定',
          type: 'warning'
        }).then(() => {
          localStorage.clear(); // @vueuse/core 自动导入
          window.location.href = '/';
        });
      }else{
          ElMessage.error(msg || '系统出错');
      }
    }
    return Promise.reject(error.message);
  }
);
// 导出 axios 实例
export default service;

/**
 * 登录请求参数
 */
export interface LoginData {
  /**
   * 用户名
   */
  username: string;
  /**
   * 密码
   */
  password: string;
}
/**
 * 登录响应
 */
export interface LoginResult {
  /**
   * 访问token
   */
  accessToken?: string;
  /**
   * 过期时间(单位：毫秒)
   */
  expires?: number;
  /**
   * 刷新token
   */
  refreshToken?: string;
  /**
   * token 类型
   */
  tokenType?: string;
}

// src/api/auth/index.ts
import request from '@/utils/request';
import { AxiosPromise } from 'axios';
import { LoginData, LoginResult } from './types';
/**
 * 登录API 
 * 
 * @param data {LoginData}
 * @returns
 */
export function loginApi(data: LoginData): AxiosPromise<LoginResult> {
  return request({
    url: '/api/v1/auth/login',
    method: 'post',
    params: data
  });
}

// src/store/modules/user.ts
import { loginApi } from '@/api/auth';
import { LoginData } from '@/api/auth/types';
/**
 * 登录调用
 *
 * @param {LoginData}
 * @returns
 */
function login(loginData: LoginData) {
  return new Promise<void>((resolve, reject) => {
    loginApi(loginData)
      .then(response => {
        const { tokenType, accessToken } = response.data;
        token.value = tokenType + ' ' + accessToken; // Bearer eyJhbGciOiJIUzI1NiJ9.xxx.xxx
        resolve();
      })
      .catch(error => {
        reject(error);
      });
  });
}