a part of react-setState-like functionality only for count function

setState-like.js

const setState = x  => {
  let _x = x;
  return [
    _x,
    (newX) => {
      _x += newX;
      return _x;
    }
  ];
}

let [count, setCount] = setState(0);

setCount(count + 1);
setCount(count + 1);
setCount(count + 1);

console.log('count: ', setCount(count + 1)); // should output => count: 4