UI State

• UI State is useful for keeping track of the current view and state of your application.

• To set/update a UI state variable, use the set() predicate:

// SYNTAX
set(var_id, var_value)

// EXAMPLE
prompt :-
  show [
    button('Create Guestbook', [ set(tab, create) ]),
    button('View Guestbook', [ set(tab, view) ]),
    button('Open Guestbook', [ set(tab, open) ])
  ].

var_id must be in snake_case OR camelCase.

• To get the current value of a UI state variable, use the get() predicate:

// SYNTAX
get(var_id, var_value)

// EXAMPLE
prompt :- get(tab, create), show[text('Create Prompt')].
prompt :- get(tab, view), show[text('View Prompt')].
prompt :- get(tab, open), show[text('Open Prompt')].