📝 Complex Form Events

Production-grade form handling with validation and error management.

Advanced Form State Management

const useForm = (initialValues, onSubmit) => {
  const [values, setValues] = React.useState(initialValues);
  const [errors, setErrors] = React.useState({});
  const [isSubmitting, setIsSubmitting] = React.useState(false);

  const handleChange = (e) => {
    const { name, value } = e.target;
    setValues(prev => ({ ...prev, [name]: value }));
  };

  const handleSubmit = async (e) => {
    e.preventDefault();
    setIsSubmitting(true);
    try {
      await onSubmit(values);
    } catch (err) {
      setErrors(err.fieldErrors);
    } finally {
      setIsSubmitting(false);
    }
  };

  return { values, errors, isSubmitting, handleChange, handleSubmit };
};

✅ Key Takeaways

• Implement **reusable form hooks** for complex validation

• Handle **async submission** with loading states

• Manage **field-level errors** effectively

• Provide **feedback** to users during submission