aliasing.js

import { useState } from "react";

export default function CounterWithMutationTracking() {
  const [state, setState] = useState(0);

  let x = [];
  let y = x;
  y.push(state);

  return (
    <div>
      <button onClick={() => setState(state + 1)}>Increment</button>
      <div>
        <span>Count: {state}</span> {y[0]}
      </div>
    </div>
  );
}