elementsFromPoint Polyfill

This polyfill comes to solve missing elementsFromPoint in some browsers / specific versions, but to use msElementsFromPoint if exists.

Using VanillaJS, very small package size.

How it works:

• Check for native document.elementsFromPoint
• If doesn't exist, try fallback to document.msElementsFromPoint
• Otherwise, use elementsFromPoint polyfill function.

Polyfill function is based on https://gist.github.com/iddan/54d5d9e58311b0495a91bf06de661380

How to use:

First install package:

$ npm install --save polyfill-elements-from-point

On application load:

import elementsFromPointPolyfill from 'polyfill-elements-from-point'

elementsFromPointPolyfill(window)

And then window.document.elementsFromPoint would be available no matter which browser you're using :)

Author notes:

• Keep in mind some browsers / some versions are returning null. See documantation.
  Although the polyfill function will always return an array, I didn't want to wrap whole function to return [] if received null, but to return original value from native functions.
• By using babel preset env, I'm assuring browsers compatibility.