⚡ Hooks Best Practices — Writing Clean Hook Code

Follow these patterns to write maintainable, performant Hook code.

🎯 Best Practices

Put all Hooks at the top level of components. Use descriptive names for state variables. Keep effects focused on one task.

import { useState, useEffect } from 'react';

// ✅ Good: Clear naming, Hooks at top
function UserForm() {
  const [formData, setFormData] = useState({});
  const [isSubmitting, setIsSubmitting] = useState(false);
  const [errors, setErrors] = useState(null);

  useEffect(() => {
    // Focused effect: Form validation
  }, [formData]);

  useEffect(() => {
    // Separate effect: Auto-save
  }, [formData]);

  return <form>{/*...*/}</form>;
}

💡 Common Mistakes to Avoid

Don't call Hooks conditionally. Don't mutate state directly. Don't forget dependencies.

// ❌ Bad: Conditional Hook
function BadComponent() {
  if (condition) {
    const [state, setState] = useState(0);
  }
}

// ✅ Good: Unconditional
function GoodComponent() {
  const [state, setState] = useState(0);
  if (condition) {
    // Use state here
  }
}

📊 Summary

🔑 Key Takeaways

• ✅ Call Hooks at component top level

• ✅ Use clear, descriptive names

• ✅ Keep effects focused

• ✅ Include all dependencies

• ✅ Extract logic to custom Hooks

• ✅ Test Hooks thoroughly

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