1const { useState } = React;
2
3function PageComponent() {
4  const [count, setCount] = useState(0);
5  const increment = () => {
6    setCount(count + 1)
7  }
8
9  return (
10    <div className="App">
11      <ChildComponent onClick={increment} count={count} />         
12      <h2>count {count}</h2>
13      (count should be updated from child)
14    </div>
15  );
16}
17
18const ChildComponent = ({ onClick, count }) => {
19  return (
20    <button onClick={onClick}>
21       Click me {count}
22    </button>
23  )
24};
25
26ReactDOM.render(<PageComponent />, document.getElementById("root"));