const Queue = (onResolve:any, onReject:any) => {

    const items:any = []
  
    const dequeue = () => {
    // no work to do
    if (!items[0]) return
  
    items[0]()
       .then(onResolve)
       .catch(onReject)
       .then(() => items.shift())
       .then(dequeue)
    }
  
    const enqueue = (func:any) => {
    items.push(func)
    if (items.length === 1) dequeue()
    }
  
    return enqueue
  }
  -------------------
  const enqueue = Queue(
    (resp:any) => console.log('success: ', resp),
    (resp:any) => console.error('error:   ', resp)
  )
  
  --------------------
    enqueue(() => axios.get("http://localhost:3000/2000"))