[Features] Repeater fields

[erwanregnier]

Hello,

In frontend I would like to add the possibility to duplicate a field group in JS (in a task list form for example, each task row has 2 required fields, click ADD TASK add an empty row with 2 fields, ecc.), but I don't know how to implement the PHP controls for the data validation.

For example like this:

Is it possible? Or what would be the best points to hook it?

thanks