I work on an application, the core of which is a very complex set of web forms. The source of this complexity
scale, some forms contain about 50 pages, which up to 30 questions on each page
complex rules, e.g. if the user answers "no" to question 4, then questions 5-15 do not apply, so should be removed from the form
Currently we use Angular Schema Form for the forms, but it doesn't provide a compelling way to manage large number of complex rules among form fields.
I don't have much experience with rules-based programming, but it seems to me that this might provide a better way of managing the rules among form fields. For example, using a rules-based approach we could define the rules associated with each form field, and the rules engine could use these to decide which field(s) to display next. Using our current approach, we achieve this with a massive amount of imperative JavaScript which is almost impossible to test and maintain.
If anyone has experience with developing such complex web forms, I'd be interested to hear about their experience e.g. tools/libraries they could recommend. Our current stack is based on the JDK (Java, Groovy, Grails) and JavaScript (Angular, Node) so tools/libraries/frameworks that run on those platforms would be of particular interest.