Callback after scrolling ends

[macieklamberski]

Hi! It would be nice to have ability to specify function called after scrolling is finished. Below are two examples how it could be tackled.

import { scrollTo } from 'scrollyo'

const el = document.querySelector('...')

// callback only for end event
scrollTo(el, 500, () => {
  console.log('scrolling is finished!')
})

// or open ability to specify multiple options
scrollTo(el, 500, {
  started() {
    console.log('scrolling has started!')
  },
  ended() {
    console.log('scrolling is finished!')
  },
  easing: 'ease-in', // it could even be open for various types of easing
})

[a-wart]

Hi! PRs are welcome, I just don't have enough time at the moment:)