setWithUpdater

void setWithUpdater(

  1. T computeNewValue(
    1. T oldValue

    )
)

Updates value to the return value of computeNewValue.

Implementation

void setWithUpdater(T Function(T oldValue) computeNewValue) {
  JSAny? updater(JSAny? oldValue) {
    final dartOld = switch (oldValue) {
      null => null as T,
      final v => switch (v.dartify()) {
        final T val => val,
        _ => null as T,
      },
    };
    final newVal = computeNewValue(dartOld);
    return switch (newVal) {
      null => null,
      final Object obj => obj.jsify(),
    };
  }

_setValue(updater.toJS);
}