I use your Community Builder component, and i create a custom field for registration and profile.
but i want to add some function, lets says;
1. i created a custom field (drop down single select) named provinces
2. i also created a custom field (drop down single select) named city

what i want is;
when i select some value on Province field, the value for city will change according to what i pick/ select on Province Field.
example;
when i select AAA on Province field, in the city field, there are A1, A2, A3, A4, A5
when i select BBB on Province field, in the city field, there are B1, B2, B3, B4, B5
when i select CCC on Province field, in the city field, there are C1, C2, C3, C4, C5

how can i do that?