DynamicForms is a particular instance of the Observer Design Pattern in which Subjects and Observers are all of the same type: form fields. The Observers don't register themselves: the Update Rules declare which fields observe which, and the Form, a Mediator between the fields, updates the Observers of each changed field. It works like a spreadsheet, where formulas declare which cells depend on which and the engine recomputes the cells depending on a changed one
The function used for the Cascade Clear (clearing fields on cascade) is the Depth-first search (DFS) used in Graph theory
The library entry point (src/index.js) implements the Facade Design Pattern to improve software usability: it masks more complex underlying code e.g. explicit objects instantiation and configuration fixing