The function code runs on the server, so prompting for file upload is not allowed.
There is a file transfer widget you can use in your button-click event to get and store the file, then pass its location to a function to be processed on the server.
The function code runs on the server, so prompting for file upload is not allowed.
There is a file transfer widget you can use in your button-click event to get and store the file, then pass its location to a function to be processed on the server.