Populating Webform Tables

Question

I am new to Drupal and have been working with Webform module to generate a custom form. One of the requirements for the form is to show a table where a user can add upload documents like this:

I created a new webform and started adding fields. As I added the 'table' field, it had option to set table Header (th) but not rows (td). I am not very familiar with the idea of hooks. Can someone please tell me how I can add rows? And if it is not possible to be done via the UI, then in what files the code must be added?

I am using Drupal 8.

Answer 1

Composite elements do not support file uploads. If there is a finite amount of documents you could manually build a table. The Table element was recently hidden because it was impossible to document. Here is an example of table layout within a Webform.