text: import React, { useState } from 'react'
  
  
  
  function App() {
    const [ count, setCount ] = useState(0)
  
    return (
      <div>
        <span>{count}</span>
        <button onClick={()=> { setCount(count + 1) }}>increment</button>
      </div>
    )
  }
  
  export default App