React code management guide: How to reasonably organize the code structure of front-end projects

React Code Management Guide: How to reasonably organize the code structure of front-end projects

Introduction:
React is a powerful JavaScript library that is widely used to build user interface. As the size of the project grows, it becomes particularly important to properly organize the code structure of the React project. This article will explore some best practices to help you build a React codebase that is easy to maintain and extend.

1. Organize the code according to functional modules
Organize the code according to functional modules. This is a common logical structure. Each feature module has its own folder and contains required components, styles, and other related files. For example, an e-commerce website can be organized according to modules such as "Home Page", "Product List", and "Shopping Cart".

The following is an example file structure:

src/
  pages/
    HomePage/
      components/
        Banner.js
        ProductList.js
        ...
      styles/
        HomePage.css
      HomePage.js
    ProductListPage/
      components/
        FilterBar.js
        ProductItem.js
        ...
      styles/
        ProductListPage.css
      ProductListPage.js
    ...
  shared/
    components/
      Navbar.js
      Footer.js
      ...
  utils/
    api.js
    helpers.js
    ...

2. Use component library
When building a React project, using a component library is a good way to improve efficiency and consistency. Component libraries abstract some common interaction and styling patterns and provide reusable components. Depending on your project needs, you can choose to use an existing open source component library, such as Ant Design or Material-UI, or create your own.

3. Single Responsibility Principle
Ensure that each component is only responsible for one responsibility. Doing so improves the readability and maintainability of your code. If a component becomes too complex, it can be split into smaller components, each responsible for only a part of the functionality.

For example, a complex form component can be split into multiple sub-components, each sub-component is responsible for an input field or part of the validation logic.

4. Separation of container components and display components
The container component is responsible for managing data and business logic, while the display component is only responsible for rendering the UI. By separating these two types of components, you can better organize your code and improve testability.

Container components manage data by using React's context (context) or using state management tools such as Redux, and pass it to the display component as props. The presentation component is only responsible for rendering the UI based on the props received.

The following is an example:

// 容器组件
class UserListContainer extends React.Component {
  state = {
    userList: [],
  };

  componentDidMount() {
    // 从API获取用户列表并更新state
    fetchUsers().then(userList => {
      this.setState({ userList });
    });
  }

  render() {
    return <UserList users={this.state.userList} />;
  }
}

// 展示组件
const UserList = ({ users }) => {
  return (
    <ul>
      {users.map(user => (
        <li key={user.id}>{user.name}</li>
      ))}
    </ul>
  );
};

5. Follow the code style guide
Following consistent coding style and naming conventions can help improve the readability and maintainability of the code. You can choose to use tools like ESLint and Prettier to enforce code style guidelines and maintain code style consistency by using editor plugins.

6. Modular CSS
Using modular CSS can make the style and component code independent of each other, making style maintenance easier. This can be achieved using tools such as CSS modules, Styled Components or CSS-in-JS.

7. Reasonable use of folder and file naming
Naming folders and files according to consistent naming standards can improve the readability and maintainability of the code. For example, name folders and files using lowercase letters, dashes, and meaningful names.

Conclusion:
React is a powerful tool for building user interfaces. Properly organizing the code structure of a React project is crucial to the scalability and maintainability of the project. Organize code according to functional modules, use component libraries, follow the single responsibility principle, separate container components and presentation components, follow code style guides, use modular CSS and use folder and file naming wisely. These best practices will help you build a clean , maintainable and easily extensible React code base.

Reference:

• "Thinking in React" - React official documentation
• "React Component Patterns" - Kent C. Dodds' blog
• "Code organization method for large-scale React projects" - Zhihu column

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