Dart Foundations

Async programming

Intermediate·18 min read

Network calls, file access and database work should not block the UI thread. Dart Futures represent eventual results.

dart

Future<List<String>> loadItems() async {
  final response = await api.fetchItems();
  return response;
}

try {
  final items = await loadItems();
} catch (error) {
  // Show a useful error state.
}

UI principle

Never make a screen wait silently. Pair asynchronous work with loading, success, empty and error states.

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