HackerNews (news.ycombinator) ajaxLoadNextPage.js

(function ajaxLoadNextPage () {
    var more = document.querySelector('.comment-tree > tbody > tr:last-child a');
    if (more && more.innerHTML === "More") {    
        var httpRequest = new XMLHttpRequest();
        httpRequest.onreadystatechange = function () {
            if (httpRequest.readyState === XMLHttpRequest.DONE) {
                if (httpRequest.status === 200) {
                  more.remove();
                  var div = document.createElement('div');
                  div.innerHTML = httpRequest.responseText;
                  var nextHTML = div.querySelector('.comment-tree > tbody').innerHTML;
                  document.querySelector('.comment-tree > tbody').innerHTML += nextHTML;
                  ajaxLoadNextPage();
                } else {
                  alert('There was a problem with the request to ' + more.href);
                }
            }
        };
        httpRequest.open('GET', more.href);
        httpRequest.send();
    }
})();