saveAs is not implemented on web yet

[ekuleshov]

Please add basic implementation for saveAs method on the web platform.
It could be the same call to FileSaverWeb.downloadFile(fileModel) as in the saveFile method.

On a side note, I wonder what are the benefits of using JS classes to assemble the data url string?

You could do it directly in Dart like Uri.dataFromBytes(fileModel.bytes, mimeType: fileModel.mimeType).toString().toJS

file_saver/lib/file_saver_web.dart

Lines 44 to 49 in 8126b49

	String url = URL.createObjectURL(
	Blob(
	<JSUint8Array>[fileModel.bytes.toJS].toJS,
	BlobPropertyBag(type: fileModel.mimeType),
	),
	);