Crash Course to Learn Freezed in Flutter App

Crash Course to Learn Freezed in Flutter App

Flutter has been gaining more and more popularity among developers, and with it, the need for tools and libraries to speed up development. Freezed is a library that helps you define immutable objects in your code with minimal effort. In this article, we will look at what Freezed is, the benefits of using it, and how to use it in a Flutter app.

What is Freezed?

Freezed is a library for generating immutable objects in Dart. It provides a set of annotation-based code generators that allow you to create immutable objects quickly and easily. Freezed also includes a number of utility functions such as copyWith(), which allows you to make changes to an existing immutable object, and deepCopy(), which creates a deep copy of an object.

Benefits of Using Freezed

Using Freezed can provide several benefits to developers. First, it simplifies the process of creating immutable objects in Dart. Instead of writing code to manually define each property and value, you can use the annotation-based code-generation to automatically generate the code for you. This can save a significant amount of time. Additionally, Freezed makes it easy to make changes to an existing immutable object without having to create a new one from scratch. Lastly, Freezed helps to ensure that objects remain immutable and protected from unintended modifications.

How to Use Freezed in your Flutter App

Using Freezed in a Flutter app is relatively straightforward. First, add the freezed package to your pubspec.yaml file:

dependencies:
  freezed: ^0.11.0

Next, define your immutable objects as classes. Each class should have a @freezed annotation and should include a const constructor. For example, the following class defines an immutable Person object:

@freezed
class Person {
  const Person({@required this.name});
  final String name;
}

After defining your immutable objects, run the flutter packages get command to install the Freezed package. Finally, import the freezed.dart file into the file or files in which you want to use Freezed:

import 'package:freezed/freezed.dart';

You can then use Freezed to automatically generate the code necessary to create immutable objects and to modify them using the copyWith() function.

Conclusion

Freezed is a great library for quickly and easily generating immutable objects in your Flutter applications. With its annotation-based code-generation and utility functions, Freezed can make working with immutable objects much simpler. Give Freezed a try in your next Flutter project and see how easy it makes working with immutable objects!