CODE EXAMPLE FOR JAVASCRIPT

setCount

import React, { useState } from "react";

const white = () => {
  return "white";
};

export default function Counter() {
  const [count, setCount] = useState(15); 
  const [currentState, setUpdateCurrentStateFunction] = useState(() => white());

  function plus() {
    setCount((prevCount) => prevCount + 1); 
  }

  function minus() {
    setCount((prevCount) => prevCount - 1);
  }

  function changeColor() {
    setUpdateCurrentStateFunction("yellow");
  }

  return (
    <div>
      <button className="plus" onClick={plus}>
        +
      </button>
      <p>{count}</p>
      <p>{currentState}</p>
      <button className="minus" onClick={minus}>
        -
      </button>
      <button onClick={changeColor}>CHANGE COLOR</button>
    </div>
  );
}