Guide to React Coding Standards: How to Keep Code Consistent and Readable

React Code Discipline Guide: How to Keep Code Consistent and Readable

Introduction:
Maintain code consistency when developing React applications and readability are very important. A good code specification can help the development team work better together, reduce the occurrence of bugs, and improve code quality. This article will introduce you to some best practices for React code specifications and provide specific code examples.

1. Naming specifications

1. Component naming: use the big camel case naming method, with the first letter capitalized.
   For example:

   class MyComponent extends React.Component {
     // ...
   }

2. Method naming: use camel case naming method, with the first letter in lowercase.
   For example:

   class MyComponent extends React.Component {
     handleClick() {
    // ...
     }
   }

3. Constant naming: use all capital letters, and use underscores to connect words.
   For example:

   const API_URL = 'https://example.com/api';

2. Code structure

1. Indentation: Use 2 spaces for indentation and avoid using tabs .
   For example:

   class MyComponent extends React.Component {
     render() {
    // ...
     }
   }

2. Line break: Each property and method should be on its own line.
   For example:

   class MyComponent extends React.Component {
     render() {
    return (
      <div>
        <h1 id="Hello-world">Hello, world!</h1>
      </div>
    );
     }
   }

3. Component writing

1. Functional components: For components that only have render methods, try to use functional components .
   For example:

   function MyComponent(props) {
     return (
    <div>
      <h1 id="Hello-world">Hello, world!</h1>
    </div>
     );
   }

2. Class component: For components that need to maintain state, use class components.
   For example:

   class MyComponent extends React.Component {
     constructor(props) {
    super(props);
    this.state = {
      count: 0
    };
     }
     
     render() {
    return (
      <div>
        <h1 id="Count-this-state-count">Count: {this.state.count}</h1>
        <button onClick={() => this.setState({count: this.state.count + 1})}>
          Increment
        </button>
      </div>
    );
     }
   }

4. PropTypes and DefaultProps

1. PropTypes: Type check the props of the component.
   For example:

   import PropTypes from 'prop-types';
   
   class MyComponent extends React.Component {
     // ...
   }
   
   MyComponent.propTypes = {
     name: PropTypes.string.isRequired,
     age: PropTypes.number
   };

2. DefaultProps: Set default values ​​for component props.
   For example:

   class MyComponent extends React.Component {
     static defaultProps = {
    age: 18
     };
     
     // ...
   }

5. Event processing

1. Event naming: use on prefix plus camel case naming method.
   For example:

   class MyComponent extends React.Component {
     handleClick() {
    // ...
     }
     
     render() {
    return (
      <button onClick={this.handleClick}>
        Click me
      </button>
    );
     }
   }

2. Event parameter passing: Avoid using event objects directly in loops. You need to use arrow functions to pass event objects.
   For example:

   class MyComponent extends React.Component {
     handleClick(id) {
    // ...
     }
     
     render() {
    return (
      <ul>
        {this.props.items.map(item =>
          <li key={item.id} onClick={() => this.handleClick(item.id)}>
            {item.name}
          </li>
        )}
      </ul>
    );
     }
   }

Conclusion:
The above are some best practices for React code specifications. By following these specifications, we can maintain the consistency and readability of the code. , improve code quality and development efficiency. I hope these specifications can be helpful to everyone's React development.

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