vue3实现文件批量下载并打包成zip文件

需要借助jszip，file-saver這两个庫

import JSZip from "jszip";
import FileSaver from "file-saver";

const getFile = (url) => {
  return new Promise((resolve, reject) => {
    // 通过请求获取文件blob格式
    let xmlhttp = new XMLHttpRequest();
    xmlhttp.open("GET", url, true);
    xmlhttp.responseType = "blob";
    xmlhttp.onload = () => {
      if (xmlhttp.status == 200) {
        resolve(xmlhttp.response);
      } else {
        reject(xmlhttp.status);
      }
    };
    xmlhttp.send();
  });
};

export const downloadZip = (fileList, zpiName = "附件") => {
  const zip = new JSZip();
  const promiess = [];
  fileList.forEach((item) => {
    const reqList = getFile(item.filePath, item.fileName).then((res) => {
      zip.file(item.fileName, res, { binary: true });
    });
    promiess.push(reqList);
  });
  Promise.all(promiess).then(() => {
    zip
      .generateAsync({ type: "blob" })
      .then((content) => {
        FileSaver.saveAs(content, zpiName);
      })
      .catch(() => {
        // window.$message.error('文件压缩失败')
      });
  });
};

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