How to use class model with Redux (with a Mobx option)

First, how to use class models in Redux; second, how to leverage MobX as an alternative or supplementary solution.

1. Using Class Models in Redux

Redux is typically used for managing application state, with its design philosophy and usage patterns favoring pure functions and immutable data. The core of Redux is a single store containing the entire application state, with state updates implemented by dispatching actions and processing them through reducer functions.

Implementation Approach:

Using class models in Redux is uncommon, as Redux officially recommends immutable data. However, if necessary, it can be implemented as follows:

• Define a Class: You can define a class to encapsulate data and methods. For example, in a user management application, you can define a User class.

javascript
class User {
  constructor(name, age) {
    this.name = name;
    this.age = age;
  }

  updateName(name) {
    this.name = name;
  }
}

• Use in Actions: When updating state, you can create an instance and pass it as part of the action.

javascript
function updateUser(user) {
  return {
    type: 'UPDATE_USER',
    payload: user
  };
}

• Process in Reducer: In the reducer, you can accept this action and process the corresponding class instance.

javascript
function userReducer(state = {}, action) {
  switch (action.type) {
    case 'UPDATE_USER':
      return { ...state, ...action.payload };
    default:
      return state;
  }
}

2. Leveraging MobX as an Option

MobX is another popular state management library that uses an object-oriented approach to manage state. MobX allows the use of mutable data and automatically updates the UI by observing changes to this data.

Implementation Approach:

When using MobX, classes are typically used to define state and methods for manipulating state.

• Define Observable Classes: Use the @observable decorator to mark state fields and the @action decorator to mark methods that change state.

javascript
import { observable, action, makeObservable } from 'mobx';

class UserStore {
  @observable user = {
    name: 'Alice',
    age: 30
  };

  constructor() {
    makeObservable(this);
  }

  @action
  updateUser(name, age) {
    this.user.name = name;
    this.user.age = age;
  }
}

• Use in React Components: Utilize observer from the mobx-react package to convert React components into responsive components, so that state updates automatically trigger component re-renders.

javascript
import React from 'react';
import { observer } from 'mobx-react';

const UserComponent = observer(({ userStore }) => (
  <div>
    <p>{userStore.user.name}</p>
    <p>{userStore.user.age}</p>
    <button onClick={() => userStore.updateUser('Bob', 25)}>Update</button>
  </div>
));

Conclusion

Using class models in Redux may require additional considerations, particularly regarding handling immutability. MobX provides a more natural way to manage state using object-oriented programming styles, especially when dealing with complex state logic and multiple related states. If the team prefers functional programming, Redux may be a better choice; if the team is more accustomed to object-oriented styles, MobX might be more suitable.