index.js

import React from 'react'
import ReactDOM from 'react-dom'
import useStateManager from './useStateManager'
import createUrlLoader from './state'

const LogicReuse = () => {
  const [userState, userActions] = useStateManager(
    createUrlLoader('https://api.github.com/users/ernestofreyreg')
  )

  return (
    <div className='App'>
      {userState.loading 
        ? <div>Loading</div>
        : <div>{JSON.stringify(userState.data || userState.error)}</div>
      }

      <button onClick={userActions.loadData}>Load User</button>
    </div>
  )
}

ReactDOM.render(<LogicReuse />, document.getElementById('root'))