Forms are everywhere on the web. From a simple sign up form to complicated application forms you’ve seen various forms with varying validation and fields. A very popular way to ask users to input multiple values for similar data is to use the “Add More” type field where the user can add any number of entries. Examples are Educational Qualification, Previous Employment History etc.
Joomla too supported the add more fields natively, by use of the repeatable element. However it had a few limitationsThe sub fields show up in a popup, and not inlineIt’s not easy to customise the layout of the popup
We’d tried to overcome these in a recent project by improving the repeatable field, but while we were doing that we realised that Joomla 3.6 has solved this in a much better way! Welcome “sub forms”. This provides a way to use JForm XML inside existing forms, by way of including another XML in lieu of a field in the parent XML. With sub-forms you can -