Memo<T> class

Memoization sugar.

Only re-evaluates builder when dependency returns a value that differs (!=) from the previous execution. Prevents expensive subtree re-evaluations when unrelated signals update.

DOM Representation

Mounts between sentinel comments <!-- bloom:memo --> and <!-- /bloom:memo -->.

final activeUserId = signal('user-1');

BloomNode userProfileView() => Div(
  children: [
    Memo(
      () => activeUserId.value,
      (id) => Div(
        className: 'profile-card',
        text: 'Loaded profile for: $id',
      ),
    ),
  ],
);