1.安装axios

npm install axios

2.封装axios

import axios, {
  AxiosRequestConfig,
  AxiosRequestHeaders,
  AxiosResponse,
} from "axios";
import { ElMessage, ElLoading } from "element-plus";
import { storeToRefs } from "pinia";
import appStore from "@/store/appStore";
let {  token } = storeToRefs(appStore());

const state = {
  ok: 0,//请求成功状态码
};

//返回数据规则
interface IResponseData<T> {
  status: number;
  message?: string;
  data: T;
  code: string;
}

//请求默认配置规则
type TOption = {
  baseURL: string;
  timeout: number;
};

//默认配置
const config = {
  baseURL: "",
  timeout: 30 * 1000,
  withCredentials: true,
};


let loading:any = null;

class Http {
  service: any;
  constructor(config: TOption) {
    //实例化请求配置
    this.service = axios.create(config);

    //请求拦截
    this.service.interceptors.request.use(
      (config: AxiosRequestConfig) => {
        loading = ElLoading.service({ fullscreen: true,text:'加载中...' });
        console.log(token.value);
        if (token.value) {
          (config.headers as AxiosRequestHeaders).authorization = token.value;
        }
        return config;
      },
      (error: any) => {
        loading.close();
        return Promise.reject(error);
      }
    );

    //响应拦截
    this.service.interceptors.response.use(
      (response: AxiosResponse) => {
        loading.close();

        const data = response.data;
      
        const { code } = data;
  
        if (code == undefined) {
          //如果没有返回状态码，直接返回数据，针对于返回数据为blob类型    
          return response;
        } else if (code !== 0) {
          ElMessage.error(data.message);
          return Promise.reject(data);
        }
        // code == 0 的时候，提取我们只关注的Api数据data
        return response.data.data;
      },
      (error: any) => {
        loading.close();
        ElMessage.error("请求失败:");
        return Promise.reject(error);
      }
    );
  }

  get<T>(url: string, params?: object, data = {}): Promise<IResponseData<T>> {
    return this.service.get(url, { params, ...data });
  }

  post<T>(url: string, params?: object, data = {}): Promise<IResponseData<T>> {
    return this.service.post(url, params, data);
  }

  put<T>(url: string, params?: object, data = {}): Promise<IResponseData<T>> {
    return this.service.put(url, params, data);
  }

  delete<T>(
    url: string,
    params?: object,
    data = {}
  ): Promise<IResponseData<T>> {
    return this.service.delete(url, { params, ...data });
  }
}

export default new Http(config);

3.使用fastmock,模拟后台数据传参

{
"code":0,
"message": "",
"data": [
  {
    "id": 1,
    "name": "手机",
    "img": "https://cdn.cnbj1.fds.api.mi-img.com/mi-mall/d764150a470174741d8b0b04515f7a78.jpg"
  },
  {
    "id": 2,
    "name": "平板",
    "img":
      "https://cdn.cnbj1.fds.api.mi-img.com/mi-mall/d764150a470174741d8b0b04515f7a78.jpg"
  },
  {
    "id": 3,
    "name": "笔记本",
    "img":
      "https://cdn.cnbj1.fds.api.mi-img.com/mi-mall/271ca8f503f72cfe33d282c74a499ebf.png"
  }
]
}

4.Proxy配置
在vite.config.ts 文件中配置

import { defineConfig } from 'vite'
import vue from '@vitejs/plugin-vue'
import path from "path";
// https://vitejs.dev/config/
export default defineConfig({
  plugins: [vue()],
  server: {

    port: 4000, // 你需要定义的端口号
// target:api地址
    proxy: {
      "/api": {
        target: "https://www.fastmock.site/mock/15a3f8addfbc34c652777f67064eb49f/",
        changeOrigin: true,
      },

    },
  },
  resolve: {
    // 配置路径别名时，要安装npm install @types/node --save-dev
    alias: {
      '@': path.resolve(__dirname, './src'),
    }
  },

})

5.使用axios

<template>
  <el-table :data="tableData" style="width: 100%">
    <el-table-column prop="id" label="#ID" width="60"> </el-table-column>
    
    <el-table-column prop="name" label="名称" width="100">
    <!-- scope代表的是当前列的填充数据 -->
      <!-- 丰富table标签，用 <template #default="scope">标签进行扩展 -->
      <template #default="scope">
        <router-link :to="{ name: 'about', query: { id: scope.row.id } }">
          {{ scope.row.name }}</router-link
        >
      </template>
    </el-table-column>

<!-- contain图片等比例缩放 -->
    <el-table-column prop="img" label="图片">
      <template #default="scope">
        <el-image
          style="width: 100px; height: 100px"
          :src="scope.row.img"
          fit="contain"
        />
      </template>
    </el-table-column>
  </el-table>
</template>

<script lang="ts" setup>
import { ref, onMounted } from "vue";
import http from "@/http/index";
//定义变量是需要用ref包裹一下
const tableData = ref([]);

//onMounted当页面加载时，显示数据
onMounted(() => {
  http
    .get("/api/products2")
    .then((res: any) => {
      tableData.value = res;
    })
    .catch((err: any) => {});
});


</script>
<style scoped>
.item {
  margin-top: 10px;
  margin-right: 40px; 
}
</style>