get scrollbar width

getScrollbarWidth.js

function getScrollBarWidth() {
      let scrollDiv = document.createElement("div");
      scrollDiv.style.overflowY = "scroll";
      scrollDiv.style.width = "50px";
      scrollDiv.style.height = "50px";
      scrollDiv.style.visibility = "hidden";
      document.body.appendChild(scrollDiv);
      let scrollbarWidth = scrollDiv.offsetWidth - scrollDiv.clientWidth;
      document.body.removeChild(scrollDiv);
      return scrollbarWidth
    }