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What are the rules for naming variables and folders?

Naming for variables and folders in a project is very important for maintaining readability and order in the code. Here are some general naming conventions and rules:

Naming variables

  1. Use camelCase: for variables, functions, and names of props or state variables, such as:

    • userName
    • isLoggedIn
    • handleClick
  2. Name it clearly: The name of a variable should clearly convey its function or the information it holds, for example:

    • cartItems (for items in the cart)
    • authToken (for authentication token)
  3. Use a descriptive name for the data type: If there are multiple data types in the same variable, for example:

    • userAge (if there are multiple variables about the user)
    • productPrice
  4. Avoid abbreviations: Use full names for clarity, for example:

    • Use userProfile instead of usrProf.

Folder naming

  1. Use kebab-case or snake_case: for the name of the folder, for example:

    • user-profile (kebab-case)
    • user_profile (snake_case)
  2. Name it descriptively: The name of the folder should reflect its contents or functionality, for example:

    • components/ (for storing React components)
    • services/ (for storing service functions or API)
    • hooks/ (for storing custom hooks)
  3. Use a consistent format: Maintain a consistent naming format across projects. For order, such as:

    • If using kebab-case for a folder Use the same format for all folders
  4. Avoid generic or vague names: Use names that reflect the folder's contents or function, such as:

    • Use utils/ instead of misc/
    • Use store/ instead of data/

example

Folder:

src/
├── components/
│   ├── Button.tsx
│   └── Header.tsx
├── hooks/
│   └── useFetch.ts
├── services/
│   └── apiService.ts
├── stores/
│   ├── auth/
│   │   ├── useAuthStore.ts
│   │   └── authTypes.ts
│   ├── user/
│   │   ├── useUserStore.ts
│   │   └── userTypes.ts
│   ├── product/
│   │   ├── useProductStore.ts
│   │   └── productTypes.ts
│   └── cart/
│       ├── useCartStore.ts
│       └── cartTypes.ts
└── index.ts

Variable:

// ตัวอย่างใน useAuthStore.ts
interface AuthState {
  isAuthenticated: boolean;
  user: string | null;
  login: (username: string) => void;
  logout: () => void;
}

// ตัวอย่างใน useUserStore.ts
interface UserState {
  name: string;
  email: string;
  updateUser: (name: string, email: string) => void;
}

Using good naming rules will help your code look organized and easier to understand

Naming a configuration value or constant such as DATABASE_CONFIG Principles should be followed that make it easy to understand and meet the objective. Here are the rules for naming configurations:

กฎในการตั้งชื่อค่าคอนฟิก

  1. ใช้รูปแบบ UPPER_SNAKE_CASE: ชื่อของค่าคอนฟิกหรือค่าคงที่ควรใช้รูปแบบ UPPER_SNAKE_CASE เพื่อแสดงให้เห็นว่านี่คือค่าคงที่และไม่ควรถูกเปลี่ยนแปลง เช่น:

    • DATABASE_CONFIG
    • API_ENDPOINT
    • MAX_RETRY_ATTEMPTS
  2. สื่อความหมายได้ชัดเจน: ชื่อของค่าคอนฟิกควรบ่งบอกถึงการใช้งานหรือวัตถุประสงค์ของมัน เช่น:

    • DATABASE_HOST (สำหรับโฮสต์ของฐานข้อมูล)
    • CACHE_EXPIRATION_TIME (สำหรับเวลาหมดอายุของแคช)
  3. รวมคอนเท็กซ์และการใช้งาน: ค่าคอนฟิกควรมีชื่อที่รวมคอนเท็กซ์หรือการใช้งานเพื่อให้เข้าใจได้ง่าย เช่น:

    • EMAIL_SERVICE_API_KEY (สำหรับคีย์ API ของบริการอีเมล)
    • JWT_SECRET_KEY (สำหรับคีย์ลับของ JSON Web Token)
  4. หลีกเลี่ยงการใช้ชื่อที่คลุมเครือ: ชื่อของค่าคอนฟิกควรเฉพาะเจาะจงและไม่ควรใช้ชื่อที่คลุมเครือหรือทั่วไปเกินไป เช่น:

    • ใช้ DATABASE_PORT แทน PORT
    • ใช้ SESSION_TIMEOUT แทน TIMEOUT
  5. ใช้คำที่สื่อถึงประเภทของค่า: ชื่อค่าคอนฟิกควรสื่อถึงประเภทของค่า เช่น ค่าเชิงตัวเลข, สตริง, หรือ Boolean เป็นต้น เช่น:

    • MAX_CONNECTIONS (ค่าตัวเลขสูงสุดของการเชื่อมต่อ)
    • ENABLE_LOGGING (ค่า Boolean สำหรับเปิดหรือปิดการบันทึก)

ตัวอย่างการตั้งชื่อค่าคอนฟิก

ไฟล์คอนฟิก

// ตัวอย่างในไฟล์ config.ts

export const DATABASE_CONFIG = {
  HOST: 'localhost',
  PORT: 5432,
  USER: 'dbuser',
  PASSWORD: 'password',
  DATABASE_NAME: 'mydatabase'
};

export const API_CONFIG = {
  BASE_URL: 'https://api.example.com',
  TIMEOUT: 5000, // Timeout in milliseconds
  API_KEY: 'your-api-key-here'
};

export const APP_SETTINGS = {
  MAX_RETRY_ATTEMPTS: 3,
  SESSION_TIMEOUT: 3600, // Timeout in seconds
  ENABLE_LOGGING: true
};

การใช้ค่าคอนฟิกในโค้ด

import { DATABASE_CONFIG, API_CONFIG, APP_SETTINGS } from './config';

// การใช้ค่าคอนฟิกในการเชื่อมต่อฐานข้อมูล
const dbConnection = connectToDatabase({
  host: DATABASE_CONFIG.HOST,
  port: DATABASE_CONFIG.PORT,
  user: DATABASE_CONFIG.USER,
  password: DATABASE_CONFIG.PASSWORD,
  database: DATABASE_CONFIG.DATABASE_NAME
});

// การใช้ค่าคอนฟิกสำหรับ API
const fetchData = async () => {
  try {
    const response = await fetch(API_CONFIG.BASE_URL + '/data', {
      method: 'GET',
      headers: {
        'Authorization': `Bearer ${API_CONFIG.API_KEY}`
      },
      timeout: API_CONFIG.TIMEOUT
    });
    const data = await response.json();
    return data;
  } catch (error) {
    if (APP_SETTINGS.ENABLE_LOGGING) {
      console.error('Error fetching data:', error);
    }
    throw error;
  }
};

การใช้หลักการเหล่านี้จะช่วยให้คุณตั้งชื่อค่าคอนฟิกอย่างมีระเบียบและเข้าใจง่ายครับ

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