This is a simple polyfill for document.elementsFromPoint that relies on document.elementFromPoint call (that should be supported by browser).
It solves the problem at least for Safari 11.0 that supports only latter.
For documentation on document.elementsFromPoint please take a look on MDN article.
This polyfill is based on following GitHub gist: https://gist.github.com/iddan/54d5d9e58311b0495a91bf06de661380
Polyfill can be imported as require 'elementsfrompoint-polyfill'; or with ES6 syntax import('elementsfrompoint-polyfill');