Thanks for the prompt reply!.
No, there is currently no simple and direct way to restrict file type extensions in file inputs. It´s not something we needed so far.
Sample app provided with the framework itself shows requirement, as the page is to upload images, but can upload any type of file.
Ok, is it a must have or urgent requirement from your perspective, it might not be. It probably will be nice to have feature.
A simple property for the file type attribute that accept extensions (if os is windows) and a code that generates html something like
<input type="file" id="myfile" name="myfile" accept="application/pdf, application/vnd.ms-excel"><br><br>
Sorry, I'm just talking my thoughts loudly, that's all. It might not be that easy as I think it might be.
Thanks anyway!