微信小程序官网社区有申明微信小程序无法多文件上传，所以要通过递归进行多文件上传。
网上得上传例子都不满足我的要求，如下是我的代码，希望能给予参考。

方法upload单文件上传 方法uploadFils多文件上传

   export function uploadFils(url, filePathArr) {     return uploadFilsSync(url, filePathArr, 0, { success: [], fail: [] });   }    function uploadFilsSync(url, filePathArr, index, result) {     return upload(url, filePathArr[index++], {})       .then(res => {         result.success.push({ index: index, res: res });         if (index === filePathArr.length) {           return result;         } else {           return uploadFilsSync(url, filePathArr, index, result);         }       })       .catch(err => {         result.fail.push({ index: index, res: err });         if (index === filePathArr.length) {           return result;         } else {           return uploadFilsSync(url, filePathArr, index, result);         }       });   }         export function upload(url, filePath, formData = {}) {     let header = { "Content-Type": "multipart/form-data" };     return new Promise((resolve, reject) => {       wx.uploadFile({         url: config.server + url,         header: header,         filePath: filePath,         name: "file",         formData: formData,         success(res) {           resolve(res.data);         },         fail: function(error) {           reject(error);         }       });     });   }   

返回结果：

index:第几个上传文件,res做为上传结果  {     "success":[         {             "index":1,             "res":{                 "data":"123"             }         }     ],     "fail":[      ] }