Detect if a page has a vertical scrollbar?

Question

I just want some simple JQ/JS to check if the current page/window (not a particular element) has a vertical scrollbar.

Googling gives me stuff that seems overly comp

Answer 1

Other solutions didn't work in one of my projects and I've ending up checking overflow css property

function haveScrollbar() {
    var style = window.getComputedStyle(document.body);
    return style["overflow-y"] != "hidden";
}

but it will only work if scrollbar appear disappear by changing the prop it will not work if the content is equal or smaller than the window.