I have a content type
A. In this content type, i have paragraph (between 0 to n) with 2 fields.
First field is content type select (A, B and C).
Second field is based on the first field, only need to show off if the content type selected is B or C (more than that, i need to
entityQuery to see if B or C is a child of A).
Can i use
form states API to alter the form and only display the second field based on the type selected on the first field ? And also
Ajax to reload the content of it ? Do you see an other way ?