Re-order SotT comments

// ==UserScript==
// @name         Re-order SoTT Comments
// @namespace    http://tampermonkey.net/
// @version      0.1
// @description  try to take over the world!
// @author       You
// @match        *://*.sott.net/article/*
// @icon         data:image/png;base64,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
// @grant        GM_registerMenuCommand


// ==/UserScript==

GM_registerMenuCommand("Re-order comments (new to old)", do_something);
console.log("is this thing on?");
let docFragment = document.createDocumentFragment();

function do_something(){
    let comments_section = document.getElementsByClassName("comment");
    let tdivs = [].slice.call(comments_section);
    tdivs.sort(sort_divs).forEach(display_current_attribute);
    document.getElementById("article_comments").appendChild(docFragment);
}
function sort_divs(a,b){
    const dval1 = new Date(a.getElementsByClassName('comment-timestamp')[0].getAttribute('title'));
    const dval2 = new Date(b.getElementsByClassName('comment-timestamp')[0].getAttribute('title'));
    if(dval1 > dval2){
        return -1;
    }
    else{
         return 1;
    }
}
function display_current_attribute(tdiv_obj){
    const tdiv_header = tdiv_obj.getElementsByClassName('comment-timestamp');
    const td_style = tdiv_obj.getAttribute('class');
    const new_td_style = td_style.replace(/reply/, "");
    tdiv_obj.setAttribute('class', new_td_style);
    docFragment.appendChild(tdiv_obj);
}