allowDownloadByUrl does not work

[ctml91]

Setting allowDownloadByUrl = true yields no change in behaviour. When debugging, the value is null, so it is not using getting the value.

It would also be helpful to improve the documentation, with examples as the demo does not show all options. I had to look through the code to figure out that it's looking at the file metadata for the url. When allowDownloadByUrl is set to false chrome just spits out Uncaught TypeError: Failed to execute 'createObjectURL' on 'URL': No function was found that matched the signature provided.

https://stackoverflow.com/questions/27120757/failed-to-execute-createobjecturl-on-url

Not sure how it would even work if that function did work. The file on server is quite often stored in a permanent location that is not publicly accessible via URL. There is no way the utility would know what path to reach it at automatically.