avoid-notifier-constructors

added in: 1.19.0

warning

Pro+

Warns when a Notifier (or AsyncNotifier) has a non-empty constructor.

Having logic inside the constructor can lead to state initialization issues and unexpected behavior.

Example

❌ Bad:

class Counter extends Notifier<int> {
  var state = 0;

  // LINT: Avoid creating constructors for notifiers. Try moving the constructor logic to the 'build' method.
  Counter() {
    state = 1;
  }

  @override
  int build() {
    return state;
  }

  void increment() {
    state++;
  }
}

✅ Good:

class Counter extends Notifier<int> {
  @override
  int build() {
    return 0; // Correct, initialized in the build method.
  }

  void increment() {
    state++;
  }
}