Question 1

How do I set up Freezed in a Flutter project?

Accepted Answer

Add 'freezed_annotation' and 'freezed' to your pubspec.yaml under dependencies and dev_dependencies, annotate classes with @freezed, and run 'flutter pub run build_runner build'. Import the generated .freezed.dart files to use the classes.

Question 2

Freezed vs built_value: which is better for Dart immutability?

Accepted Answer

Freezed is more modern with less boilerplate and built-in JSON serialization, while built_value is older but might suit legacy codebases. Freezed is often preferred for new projects due to its ergonomics and features like union types.

Question 3

How to handle nested JSON objects with Freezed?

Accepted Answer

Define nested classes with @freezed annotations, and Freezed will generate serialization methods that handle recursion automatically. Use @JsonKey for custom field mappings if needed, as mentioned in the documentation.

Question 4

Can Freezed be used with state management like Riverpod or Bloc?

Accepted Answer

Yes, Freezed is commonly paired with Riverpod or Bloc for immutable state objects. The generated copyWith methods simplify state updates in reducers or providers, enhancing type safety.

Question 5

What are common pitfalls when using Freezed in large projects?

Accepted Answer

Large projects may experience increased build times from code generation, challenges with team consistency in annotation usage, and difficulty debugging generated code without deep understanding of the tool.

Question 6

How to add custom methods to Freezed classes?

Accepted Answer

Define an abstract class with @Freezed annotation and include custom methods in it. Freezed preserves these methods in the generated immutable class, allowing flexibility beyond basic code generation.

Freezed

What is Freezed?

Overview

Use Cases

Best For

Found a gem we're missing?

Not Ideal For

Pros & Cons

Pros

Cons

Frequently Asked Questions