How to Write Clean Code in JavaScript: Best Practices and Tips

Writing clean, readable, and maintainable code is essential to becoming a proficient JavaScript developer. Clean code improves collaboration, reduces bugs, and makes future changes easier. Here are some essential practices and techniques for writing clean code in JavaScript.

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1. Use Meaningful and Descriptive Variable Names

Choose clear, descriptive names for your variables and functions that communicate their purpose without needing extra comments. Avoid single-letter or ambiguous names unless they are universally understood (like i for iteration).

Example:

// Bad
let x = 100;
let y = 200;

// Good
let screenWidth = 100;
let screenHeight = 200;

2. Keep Functions Short and Focused (Single Responsibility Principle)

Each function should perform one specific task. This makes code easier to understand, test, and maintain.

Example:

// Bad: Too many responsibilities
function handleUserProfile(user) {
  console.log(`User: ${user.name}`);
  user.active = true;
  saveToDatabase(user)…