Clean TypeScript 🧼

Best practices for writing clean and maintainable TypeScript code

Writing clean and maintainable code is essential for any TypeScript project. Here are some best practices to follow:

1. Use Descriptive Naming

Use meaningful and descriptive names for variables, functions, classes, and other identifiers. Avoid overly abbreviated or cryptic names.

// Bad
const u = getUser();

// Good
const user = getUser();

2. Follow a Consistent Coding Style

• Adopt a consistent coding style throughout your codebase. Use a linter like ESLint with a TypeScript plugin to enforce coding standards.

function getUser() {
	// code here
}

3. Use TypeScript Features Wisely

• Leverage TypeScript's strong typing features to catch errors early and improve code readability. Use interfaces and types to define clear contracts.

// Bad
function greet(name: any | unknown) {
	console.log(`Hello, ${name}`);
}

// Good
function greet(name: string) {
	console.log(`Hello, ${name}`);
}

4. Keep Functions Small and Single-Purpose

• Follow the Single Responsibility Principle (SRP) by keeping functions small and .focused on a single task. This improves readability and makes your code easier to maintain.

function processUserData(user: User) {
	validateUser(user);
	updateUserStats(user);
	sendEmailNotification(user);
}

function validateUser(user: User) {
	// code here
}

function updateUserStats(user: User) {
	// code here
}

function sendEmailNotification(user: User) {
	// code here
}

5. Write Readable and Self-Documenting Code

• Write code that is easy to understand without the need for excessive comments. Use meaningful variable names and function names to convey intent.

// Bad
const a = 10;
const b = 20;
const sum = a + b;

// Good
const number1 = 10;
const number2 = 20;
const sum = number1 + number2;

Conclusion

• Following these best practices can help you write cleaner, more maintainable TypeScript code. Remember that clean code is not just about following rules but also about fostering good coding habits and principles.