Reactda funktsiya yordamida ma'lumotlarni o'zgartirish

Holat ustida ba'zi amallarni to'g'ridan-to'g'ri chiqarishda bajarish shart emas. Funktsiyadan foydalanish mumkin:

jsxfunction square(num) {
  return num ** 2;
}

function App() {
  const [value, setValue] = useState(0);
  
  function handleChange(event) {
    setValue(event.target.value);
  }
  
  return <div>
    <input value={value} onChange={handleChange} />
    <p>{square(value)}</p>
  </div>;
}