Can widgets support file uploads in the configuration?

Yes, url and urlList properties in widget configuration can support uploading via options on their default rendering. For example, for a url property, setting the allowLocal="true" option will allow uploading files. To the widget, the file will be provided from configuration by URL.

See https://community.telligent.com/community/12/w/api-documentation/69214/url-property-template 

Yes, url and urlList properties in widget configuration can support uploading via options on their default rendering. For example, for a url property, setting the allowLocal="true" option will allow uploading files. To the widget, the file will be provided from configuration by URL.

See https://community.telligent.com/community/12/w/api-documentation/69214/url-property-template