Front-end data state management: explore React's Redux and Vue.js' Vuex

introduce

      In modern front-end development, data state management becomes more and more important as application complexity increases. This article will explore data state management in front-end applications, focusing on two popular state management libraries: Redux for React and Vuex for Vue.js. We will understand their basic concepts, core components and application scenarios in complex applications to help you build more robust and maintainable front-end applications.

Part 1: Redux Basics

Redux is a state container for JavaScript applications that predicts application state changes and keeps the entire application state in a single, immutable object. Redux follows the principle of unidirectional data flow.

Core idea:

• Store: A container that stores the state of the entire application.
• Action: An object describing what happened.
• Reducer: A function that describes how to change the state.

Redux example: 

// 定义 Action 类型
const INCREMENT = 'INCREMENT';
const DECREMENT = 'DECREMENT';

// 定义 Action 创建函数
function increment() {
  return { type: INCREMENT };
}

function decrement() {
  return { type: DECREMENT };
}

// 定义 Reducer
function counterReducer(state = 0, action) {
  switch (action.type) {
    case INCREMENT:
      return state + 1;
    case DECREMENT:
      return state - 1;
    default:
      return state;
  }
}

// 创建 Redux Store
const { createStore } = Redux;
const store = createStore(counterReducer);

// 订阅 Store 变化
store.subscribe(() => console.log(store.getState()));

// 分发 Action
store.dispatch(increment());
store.dispatch(decrement());

Application scenario:

• State management for complex applications.
• Share state across components.

Part 2: Vuex Basics

Vuex is the official state management library of Vue.js, which manages the state of all components of the application through centralized storage, and ensures predictable state changes with corresponding rules.

Core idea:

• State : Stores the state of the application.
• Mutation : The only way to change the State is a synchronous operation.
• Action : Submit Mutation, which can contain any asynchronous operation.
• Getter : Some states are derived from State, similar to computed properties.

Vuex example:

const store = new Vuex.Store({
  state: {
    count: 0
  },
  mutations: {
    increment(state) {
      state.count++;
    },
    decrement(state) {
      state.count--;
    }
  },
  actions: {
    asyncIncrement({ commit }) {
      setTimeout(() => {
        commit('increment');
      }, 1000);
    }
  },
  getters: {
    doubleCount(state) {
      return state.count * 2;
    }
  }
});

// 在 Vue 组件中使用 Vuex
new Vue({
  el: '#app',
  store,
  computed: {
    count() {
      return this.$store.state.count;
    },
    doubleCount() {
      return this.$store.getters.doubleCount;
    }
  },
  methods: {
    increment() {
      this.$store.commit('increment');
    },
    asyncIncrement() {
      this.$store.dispatch('asyncIncrement');
    }
  }
});

Application scenario:

• Manage complex state of Vue.js applications.
• Handles asynchronous operations.

Part 3: Application of Redux and Vuex in complex applications

In complex front-end applications, data state management is particularly important. Both Redux and Vuex provide powerful tools and rules to help you better organize and manage state.

how to choose:

• Redux: Suitable for framework-independent applications, or when sharing state between multiple frameworks.
• Vuex: Suitable for Vue.js applications, perfectly combined with Vue components.

Best Practices:

• Split state into modular chunks for easy management and maintenance.
• Extend the functionality of Redux and Vuex with plugins and middleware.

epilogue

Data state management is the core of complex front-end applications. Redux and Vuex are two excellent state management libraries, both of which can help you effectively manage the state of your application and make your application more robust and maintainable. Choose a state management solution suitable for your project, and combine best practices to build a better front-end application.

appendix

Great resources for further learning about Redux and Vuex:

• Redux Chinese documentation
• Vuex Official Documentation

I wish you progress and success in the learning and practice of front-end data state management!