React - State

State adalah data internal milik component
State bisa berubah seiring waktu
Perubahan state akan me-render ulang component
Menggunakan hook useState

Code example

import { useState } from "react";

function Counter() {
  const [count, setCount] = useState(0);

  return (
    <button onClick={() => setCount(count + 1)}>
      Klik: {count}
    </button>
  );
}