ReactJs — Forms and Controlled Components

Controlled components are form elements like inputs and textareas that are controlled by React state. Their values are updated via state and event handlers.

import React, { useState } from 'react';

function Form() {
  const [name, setName] = useState('');

  const handleSubmit = (e) => {
    e.preventDefault();
    alert('Submitted name: ' + name);
  };

  return (
    <form onSubmit={handleSubmit}>
      <input type="text" value={name} onChange={(e) => setName(e.target.value)} />
      <button type="submit">Submit</button>
    </form>
  );
}

export default Form;