Conditional form logic add-on for Ninja Forms.
Show or hide fields, change field values, or send specific notifications all based upon user input.
This extension for Ninja Forms allows you to create “smart” forms. Fields within these forms can dynamically change based upon user input; show or hide fields based on a selected item, set field values based upon a list selection, or display some text or a link based on the options chosen. Starting in version 1.3 you can now create conditional notifications as well based on users input as well as other built-in our custom triggers.