Auto save the document in AWS S3 in JavaScript (ES5) DocumentEditor control

import {
DocumentEditorContainer,
Toolbar,
} from '@syncfusion/ej2-documenteditor';
let container: DocumentEditorContainer = new DocumentEditorContainer({ enableToolbar: true, height: '590px' });
let contentChanged: boolean = false;
DocumentEditorContainer.Inject(Toolbar);
container.serviceUrl = 'https://ej2services.syncfusion.com/production/web-services/api/documenteditor/';
container.created = function () {
setInterval(() => {
    if (contentChanged) {
        //You can save the document as below
        container.documentEditor.saveAsBlob('Docx').then((blob: Blob) => {
            console.log('Saved sucessfully');
            let exportedDocument: Blob = blob;
            //Now, save the document where ever you want.
            let formData: FormData = new FormData();
            formData.append('fileName', 'sample.docx');
            formData.append('data', exportedDocument);
            /* tslint:disable */
            var req = new XMLHttpRequest();
            // Replace your running Url here
            req.open(
                'POST',
                'http://localhost:62869/api/documenteditor/SaveToS3',
                true
            );
            req.onreadystatechange = () => {
                if (req.readyState === 4) {
                    if (req.status === 200 || req.status === 304) {
                        console.log('Saved sucessfully');
                    }
                }
            };
            req.send(formData);
        });
        contentChanged = false;
    }
}, 1000);
};
container.appendTo('#container');

container.contentChange = (): void => {
contentChanged = true;
};

 <appSettings>
<add key="AWSProfileName" value="sync_development" />
<add key="AWSAccessKey" value="" />
<add key="AWSSecretKey" value="" />
  </appSettings>

Amazon.Util.ProfileManager.RegisterProfile("sync_development","", "");

[AcceptVerbs("Post")]
[HttpPost]
[EnableCors("AllowAllOrigins")]
[Route("SaveToS3")]
public string SaveToS3()
{
IFormFile file = HttpContext.Request.Form.Files[0];
Stream stream = new MemoryStream();
file.CopyTo(stream);
UploadFileStreamToS3(stream, "documenteditor", "", "GettingStarted.docx");
stream.Close();
return "Sucess";
}

public bool UploadFileStreamToS3(System.IO.Stream localFilePath, string bucketName, string subDirectoryInBucket, string fileNameInS3)
{
AWSCredentials credentials = new StoredProfileAWSCredentials("sync_development");
IAmazonS3 client = new AmazonS3Client(credentials, Amazon.RegionEndpoint.USEast1);
TransferUtility utility = new TransferUtility(client);
TransferUtilityUploadRequest request = new TransferUtilityUploadRequest();

if (subDirectoryInBucket == "" || subDirectoryInBucket == null)
{
  request.BucketName = bucketName; //no subdirectory just bucket name  
}
else
{   // subdirectory and bucket name  
  request.BucketName = bucketName + @"/" + subDirectoryInBucket;
}
request.Key = fileNameInS3; //file name up in S3  
request.InputStream = localFilePath;
utility.Upload(request); //commensing the transfer  

return true; //indicate that the file was sent  
}