buildWhen property

BuilderCondition<T>? buildWhen

An optional buildWhen can be implemented for more granular control over how often LidBuilder rebuilds. buildWhen will be invoked on each stateNotifier state change. buildWhen takes the previous state and current state and must return a bool which determines whether or not the builder function will be invoked. The previous state will be initialized to the state of the stateNotifier when the LidBuilder is initialized. buildWhen is optional and if omitted, it will default true if previous state is different current state, otherwise is false, however the first time does not have an effect, always true.

LidBuilder<StateType>(
  stateNotifier: stateNotifier,
  buildWhen: (previous, current) {
    // return true/false to determine whether or not
    // to rebuild the widget with state
  },
  builder: (context, state) {
  // return widget here based on State Notifier's state
  }
)

Implementation

final BuilderCondition<T>? buildWhen;