多个文件通过压缩包下载

import axios from "axios";
import { saveAs } from "file-saver";
import JSZip from "jszip";

async handleDownload(row) {
      let params = {
        id: row.id,
      };
      let fileInfos = await this.getFileInfos(params);
      if (fileInfos .length > 0) {
        const zip = new JSZip();
        const cache = {};
        const promises = [];
        fileInfos .forEach((item) => {
          if (item.url) {
            const promise = this.download(item.url).then((data) => {
              // 下载文件, 并存成ArrayBuffer对象
              zip.file(item.packageName, data, { binary: true }); // 逐个添加文件
              cache[item.packageName] = data; //可要可不要 用来打印查检查添加了那些文件
            });
            promises.push(promise); //加到promises队列里
          } else {
            this.$Notice.warning({
              title: `附件${item.packageName}地址错误，下载失败`,
            });
          }
        });
        Promise.all(promises)
          .then(() => {
            //异步队列全部完成时 执行下面代码
            zip.generateAsync({ type: "blob" }).then((content) => {
              // 生成二进制流s
              saveAs(content, "打包下载.zip"); // 利用file-saver保存文件
            });
          })
          .catch((res) => {
            this.$Notice.warning({
              title: "文件压缩失败",
            });
          });
      }
    },
    download(href) {
      return new Promise((resolve, reject) => {
        axios({
          method: "get",
          url: href,
          responseType: "arraybuffer",
        })
          .then((data) => {
            resolve(data.data);
          })
          .catch((error) => {
            reject(error.toString());
          });
      });
    },
    // 获取文件列表
    getFileInfos(params) {
      return new Promise((resolve) => {
        axios.get("xxxxxxxx", { params: params })
          .then((res) => {
            const result = res.data;
            if (result.code === "000000") {
              const data = result.data.fileInfos;
              resolve(data);
            }
          });
      });
    },