Problems

[Grawl]

Three options.

First: I just trying to run this script when it's loaded:

import getScrollbarWidth from 'get-scrollbar-width'
window.scrollbarWidth = getScrollbarWidth() // index.js:23 Uncaught TypeError: Cannot read property 'appendChild' of null

Second: I trying to run this script on jQuery.ready():

import getScrollbarWidth from 'get-scrollbar-width'
$(document).ready(() => {
	window.scrollbarWidth = getScrollbarWidth() // -200 on macOS when scrollbars is hidden until scroll
})

Third: I'm trying to run this script on default exported function:

import getScrollbarWidth from 'get-scrollbar-width'
export default () => {
	window.scrollbarWidth = getScrollbarWidth() // undefined
}

I'm not sure about last but first two must work.

[Grawl]

sonicdoe/measure-scrollbar works on jQuery.ready()