detect if a browser hits bottom

isAtScrollBottom.js

 isAtScrollBottom() {
            //https://gist.github.com/nathansmith/8939548
            //https://www.quora.com/How-do-you-detect-in-JavaScript-when-a-user-has-scrolled-to-the-bottom-of-the-page
            //https://stackoverflow.com/questions/1145850/how-to-get-height-of-entire-document-with-javascript
            //https://techstacker.com/posts/gGyGTHysrPuuJnNBk/vanilla-javascript-detect-when-user-scrolled-to-the-bottom
            let body = document.body;
            let html = document.documentElement;
            var height = Math.max(body.scrollHeight, body.offsetHeight,
                html.clientHeight, html.scrollHeight, html.offsetHeight);

            if ((window.innerHeight + Math.ceil(window.pageYOffset)) >= height) {
                console.log('At the bottom!');
                return true;
            }
            return false;
           // console.log(`innerHeight ${window.innerHeight} scroll ${Math.ceil(window.pageYOffset)} height ${height}`)

        }