How can i await for file to upload so i can upload next image with params

[Saqib92]

How to use with async await to upload images because i want to send params to next image returned from 1st request.

post_id returned from 1st request should be sent with all next images.

this is what is am doing but it is not waiting:

dropped(files: NgxFileDropEntry[]) {
    this.files = files;
    for (const droppedFile of files) {

      // Is it a file?
      if (droppedFile.fileEntry.isFile) {
        const fileEntry = droppedFile.fileEntry as FileSystemFileEntry;
        fileEntry.file(async (file: File) => {
          // Here you can access the real file
          console.log(droppedFile.relativePath, file);

          await new Promise((resolve, reject) => {
            this.http.uploadImages(file, 'UploadImage', this.postId).subscribe((res: any) => {
              if (res.status == true) {
                resolve(true);
                this.postId = res.data.post_id; // i want to send this ID in next request. 
              } else {
                reject();
                console.log(res.message);
              }
            })
          });


        });
      } else {
        // It was a directory (empty directories are added, otherwise only files)
        const fileEntry = droppedFile.fileEntry as FileSystemDirectoryEntry;
        console.log(droppedFile.relativePath, fileEntry);
      }
    }
  }