vue使用jszip 和file-saver 打包多层文件

效果：

npm install jszip
npm install file-saver

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

 BatchDownload(){
      const fileName = '测试'
      const FileName = '压缩包'
      const fileType  = 'jpg'
      const url = this.getImgArrayBuffer('https://xxx.jpg')
      let zip = new JSZip();
        const img = zip.folder(FileName);
        const meshes = img.folder('照片')
      
      
        img.file(`${fileName}.` + 'xls', url, { base64: true });
        // meshes.file(`mesh.` + fileType, url, { base64: true });
        
          const imgDataUrl = [
          {
            nickname: '小王.jpg',
            path: 'https://xxx.jpg'
          },
          {
            nickname: '小羊.jpg',
            path: 'https://xxx.jpg'
          }
        ]
        let _this = this;
        let cache = {};
        let promises = [];
        _this.title = '正在加载压缩文件';
 
        for (let item of imgDataUrl) {
          const promise= _this.getImgArrayBuffer(item.path).then(data => {
            // 下载文件, 并存成ArrayBuffer对象(blob)
            meshes.file(item.nickname, data, { base64: true });
            // zip.file(item.nickname, data, { binary: true }); // 逐个添加文件
            cache[item.nickname] = data;
          });
          promises.push(promise);
        }
        Promise.all(promises).then(() => {
          zip.generateAsync({ type: 'blob', compression: 'DEFLATE', compressionOptions: { level: 9 } }).then((content) => {
          FileSaver.saveAs(content, `${FileName}.zip`);
        });
        })
},
//通过url 转为blob格式的数据
    getImgArrayBuffer(url){
      let _this=this;
      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 = function () {
          if (this.status == 200) {
            resolve(this.response);
          }else{
            reject(this.status);
          }
        }
        xmlhttp.send();
      });
    },

啦-啦-啦啦~ 啦-啦-啦-啦啦~ 完成啦~~~