I want to make a custom Excel.
I want to type in some inputs and then export into a Excel.
I have a example Excel file for it.
I have tried the Data Exporter Extension but it can't fulfill my demand.
Data Exporter Extension it's pretty simple ( it's just a proof of concept ), but it leverages a super powerful Office library, if you need to do more real stuff you will need to download it decompile and expose the functionality you need. We already did it successfully in order to read Excel files and wasn't that hard.