🚀 5 JavaScript Best Practices That Transformed My Code Quality

Published at

12/20/2024

1️⃣ Replace nested callbacks with async/await:

Before:

getData((result) => {
  processData(result, (processed) => {
    saveData(processed, (saved) => {
      console.log('Done!');
    });
  });
});

After:

async function handleData() {
  const result = await getData();
  const processed = await processData(result);
  await saveData(processed);
  console.log('Done!');
}

2️⃣ Use destructuring for cleaner code:

Before:

const user = getUser();
const name = user.name;
const email = user.email;

After:

const { name, email } = getUser();

3️⃣ Early returns to avoid nested conditions:

Before:

function processUser(user) {
  if (user) {
    if (user.isActive) {
      if (user.hasPermission) {
        // Do something
        return true;
      }
    }
  }
  return false;
}

After:

function processUser(user) {
  if (!user) return false;
  if (!user.isActive) return false;
  if (!user.hasPermission) return false;

  // Do something
  return true;
}

4️⃣ Use meaningful variable names:

Before:

const x = users.filter(u => u.a > 18);

After:

const activeUsers = users.filter(user => user.age > 18);

5️⃣ Implement proper error handling:

Before:

try {
  doSomething();
} catch (e) {
  console.log(e);
}

After:

try {
  await doSomething();
} catch (error) {
  logger.error('Operation failed:', {
    error: error.message,
    stack: error.stack,
    context: 'doSomething operation'
  });
  throw new CustomError('Operation failed', error);
}

💡 These practices have helped me:

Reduce bugs by 40%
Make code reviews faster
Make maintenance easier
Improve team collaboration

What's your favourite JavaScript best practice? Share in the comments! 👇

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🚀 5 JavaScript Best Practices That Transformed My Code Quality

1️⃣ Replace nested callbacks with async/await:

2️⃣ Use destructuring for cleaner code:

3️⃣ Early returns to avoid nested conditions:

4️⃣ Use meaningful variable names:

5️⃣ Implement proper error handling: