🏆 7 JavaScript Best Practices Every Developer Should Know

✅ Hey devs! 👋 Here are 7 best practices for writing better code, avoiding bugs, and keeping things maintainable.

1️⃣ Use const and let Instead of var
✅ Always declare variables with const (for values that don’t change) or let (for values you need to reassign).
❌ Avoid var — it’s function-scoped and can cause unexpected behavior.

2️⃣ Prefer Strict Equality (===)
✅ Use === and !== to avoid unexpected type coercion.

0 === false; // ❌ false, but avoids surprises
0 == false;  // 😱 true, but can be confusing

3️⃣ Avoid Modifying the Global Scope
🚫 Don’t add variables or functions to the global object — it can lead to conflicts.
✅ Use modules or closures to encapsulate your code.

4️⃣ Use Arrow Functions When Possible
✅ They’re shorter and don’t bind their own this, which makes them perfect for callbacks.

const nums = [1, 2, 3].map(n => n * 2);

5️⃣ Handle Errors Gracefully
🛡️ Always use try/catch with async code or Promises to handle errors properly.

async function fetchData() {
  try {
    const res = await fetch('/api');
    const data = await res.json();
    console.log(data);
  } catch (err) {
    console.error('Fetch failed:', err);
  }
}

6️⃣ Avoid Callback Hell
🔗 Use Promises or async/await instead of deeply nested callbacks.
✅ This improves readability and avoids spaghetti code.

7️⃣ Keep Code DRY (Don’t Repeat Yourself)
♻️ Reuse functions, constants, and utilities instead of duplicating code.
✅ This makes updates easier and reduces bugs.

🎉 These tips will boost your JavaScript skills and make your codebase enjoyable.