AccordionHook.jsx

const Hello = () => {
  const [isOpen, toggleIsOpen] = React.useState(false);
  return (
    <div>
      <button onClick={(prevValue) => toggleIsOpen(!prevValue)}>click me</button>
      {isOpen ? <p>I'm open!</p> : <p>I'm closed!</p>}
    </div>
  );
};