JSFiddle - React, Tailwind, and code Playground

by sc0rp10

JavaScript

var div = document.createElement('div');
div.style.cssText="position:absolute;height:50px;overflow-y:hidden;width:50px;visibility:hidden";
div.innerHTML = '<div style="height:100px"></div>';
var innerDiv = div.firstChild;

document.body.appendChild(div);
var w1 = innerDiv.offsetWidth;

div.style.overflowY = 'scroll';
var w2 = innerDiv.offsetWidth;

alert(w1 - w2);