How to save your day with simple Hello World SharePoint Page Framework Add-In depolyment in Sharepoint Online?

it is quite annoying when i try to deployed my app to SharePoint online or SharePoint 365.

since i always keep gotting the following errors.

Something went wrong

If the problem persists, contact the site administrator and give them the information in Technical Details.

***ERROR MESSAGE: ***Failed to load component "d087c0cf-1f05-4575-884c-a68d708b095f" (undefined). Original error: ***Failed to load entry point from component "d087c0cf-1f05-4575-884c-a68d708b095f" (undefined). Original error: Error loading https://component-id.invalid/d087c0cf-1f05-4575-884c-a68d708b095f_0.0.1 

 Unable to load script https://vandansolution.sharepoint.com/sites/MyTeamSite/CDN/HelloWorld/hello-world-web-part.bundle 

***CALLSTACK: Error: ***Failed to load component "d087c0cf-1f05-4575-884c-a68d708b095f" (undefined). Original error: ***Failed to load entry point from component "d087c0cf-1f05-4575-884c-a68d708b095f" (undefined). Original error: Error loading https://component-id.invalid/d087c0cf-1f05-4575-884c-a68d708b095f_0.0.1 Unable to load script https://vandansolution.sharepoint.com/sites/MyTeamSite/CDN/HelloWorld/hello-world-web-part.bundle at Anonymous function (https://spoprod-a.akamaihd.net/files/sp-client-prod_2017-05-19.006/sppages-assembly_en-us_cbf51a2022764c48a50520394954a016.js:144:83608) at M (https://spoprod-a.akamaihd.net/files/sp-client-prod_2017-05-19.006/sppages-assembly_en-us_cbf51a2022764c48a50520394954a016.js:139:2381) at R (https://spoprod-a.akamaihd.net/files/sp-client-prod_2017-05-19.006/sppages-assembly_en-us_cbf51a2022764c48a50520394954a016.js:139:2469) at A (https://spoprod-a.akamaihd.net/files/sp-client-prod_2017-05-19.006/sppages-assembly_en-us_cbf51a2022764c48a50520394954a016.js:139:2291) at T (https://spoprod-a.akamaihd.net/files/sp-client-prod_2017-05-19.006/sppages-assembly_en-us_cbf51a2022764c48a50520394954a016.js:139:1887) at m (https://spoprod-a.akamaihd.net/files/sp-client-prod_2017-05-19.006/sppages-assembly_en-us_cbf51a2022764c48a50520394954a016.js:139:570)

actually the above error message did not offer any help in solving the issue. the root cause of the issue stems from the out of date Yeoman generator.  i need to clear the app that deploy to the app catelog, and update the Yeoman generator in my local development. then I update the app with new version and build the package, deployed it to the SharePoint again. then we can add this new add on from the list.

How to ensure the file upload succeed using CSOM in Sharepoint Add-ins development?

when we implement the file upload to sharepoint document library. we might not able to log the error from sharepoint, which will cause the the failure of file upload.

we can use the approach that return the document id after the file is uploaded to sharpeoint dcoment library. we can verify the document id to check the result of file upload. if the document id is return, it indicated that the document is successfully upload to sharpeoint. otherwise i will be failed.

here is the snipet of code to handle the above logic.

private string UploadFileToSharepoint(Byte[] fileData, string newFileName)
        {
         
            string guidId = string.Empty;
            try
            {
                var spContext = SharePointContextProvider.Current.GetSharePointContext(Context);

                using (var clientAppContext = spContext.CreateAppOnlyClientContextForSPHost())
                {
                    List list = clientAppContext.Web.Lists.GetByTitle(sListTitle);
                    FileCreationInformation newFile = new FileCreationInformation();
                    newFile.Overwrite = false;
                    using (newFile.ContentStream = new MemoryStream(fileData))
                    {
                        newFile.Url = newFileName;
                        Microsoft.SharePoint.Client.File uploadFile = list.RootFolder.Files.Add(newFile);
                        clientAppContext.Load(uploadFile, u => u.ListItemAllFields.Id);
                        clientAppContext.ExecuteQuery();
                        guidId = uploadFile.ListItemAllFields.Id.ToString();
                    }
                    return guidId;
                }
            }
            catch (Exception ex)
            {
                throw ex;
            }
        }