SwitchButton.js

import React from 'react'

const SwitchButton = () => {
  const [state, setState] = React.useState(false)
   
  function onClickSwitchButton() {
    setState(state => !state)
  }
  
  return (
    <button onClick={onClickSwitchButton} role="switch" aria-checked={state}>{state ? 'On' : 'Off'}<button /> 
  )
}