code:

// ==UserScript==
// @name         Ultimate Shitpost
// @namespace    [url]http://tampermonkey.net/[/url]
// @version      0.3
// @description  page number bug fixed
// @author       You
// @include        [url]https://forums.somethingawful.com/showthread.php*[/url]
// @grant        none
// @run-at document-start
// ==/UserScript==

(function() {
    'use strict';

    console.log("RESTARTING!");
    var lastpost = 0;
    var newpage = document.createElement( 'html' );
    var previewPage = pageNumber(document);
    //function quoteScript(){}
    //Returns the page number of thread
    function pageNumber(doc){
        return parseInt(document.URL.split(/(pagenumber=)/)[2])
    }
    function threadId(doc){
        return doc.body.classList[2].slice(7);
    }
    function pages(doc){
        return doc.querySelectorAll("select")[0].length
    }
    //Takes a list of post parent objects and returns the last number
    function findLastPost(posts){
        for (let x of posts){
            var last=parseInt(x.id.slice(4));
        }
        return last
    }
    function refreshIntoFalse(){
        var xhttp = new XMLHttpRequest();
        xhttp.onreadystatechange = function() {
            console.log("Reporting ready state and status:");
            console.log(this.readyState);
            console.log(this.status);
            if (this.readyState == 4 && this.status == 200) {
                newpage.innerHTML = this.responseText;
                var postnumbers = newpage.querySelectorAll("table.post");
                console.log("Whatever the gently caress postnumbers are:");
                console.log(postnumbers);
                //checks each post in new iteration of thread
                for (let x of postnumbers){
                    //checks if post is new
                    var last=parseInt(x.id.slice(4));
                    //processes all new posts
                    if(last > lastpost){
                        console.log("NEW POST FOUND");
                        lastpost=last;
                        var blob = document.getElementById("threadamalgam");
                        var newrow = blob.appendChild(document.createElement("tr"));
                        console.log(x.querySelectorAll("td.postbody"));
                        var post=x.querySelectorAll("td.postbody")
                        var userinfos = post[0].querySelectorAll("td.userinfo, p.editedby, td.postdate, td.postlinks, a.quote_link");
                        for (let x of userinfos){
                            x.parentNode.removeChild(x);
                        }
                        newrow.appendChild(post[0]);
                        var regex = /<.*>/gm;
                        var text = post[0].innerHTML;
                        text = text.replace(regex, '');
                        console.log(text);
                        var speech = new SpeechSynthesisUtterance(text);
                        var voices = window.speechSynthesis.getVoices();
                        speech.voice = voices[Math.floor(Math.random()*voices.length)];
                        window.speechSynthesis.speak(speech);
                    }
                }
                //checks for new page
                console.log("current page:" + previewPage);
                //what page am I on now?
                //what is max page in newpage?
                console.log("max pages currently:" + pages(newpage));
                console.log("Page refreshed and scanned");
                //set page to scan to next page
                if(pages(newpage)>previewPage){
                    previewPage++;
                    console.log("loading page:" + previewPage);
                    console.log("Call due to adding pages");
                    refreshIntoFalse();
                }
                else{
                    setTimeout(refreshIntoFalse, 10000);
                }
            }
        };
        xhttp.open("GET", "https://forums.somethingawful.com/showthread.php?threadid="+threadId(document)+"&userid=0&perpage=40&pagenumber="+previewPage, true);
        xhttp.send();
    }
    //post number of last post on page

    var observation = document.head;
    var observer = new MutationObserver(function(){
        if(document.body){
            document.body.style.visibility='hidden'};
        observer=null;
    })
    observer.observe(observation, {subtree: true, childList: true});
    window.addEventListener('load', (event) => {
        console.log("FULLY LOADED");
        console.log(document.body.style.visibility);
        var userinfos = document.querySelectorAll("td.userinfo, p.editedby, td.postdate, td.postlinks, a.quote_link");
        for (let x of userinfos){
            x.parentNode.removeChild(x);
        }
        var threadamalgam = document.getElementById("thread").appendChild(document.createElement("table"));
        console.log(threadamalgam);
        threadamalgam.id = 'threadamalgam';
        var postnumbers = document.querySelectorAll("table.post");
        lastpost=findLastPost(postnumbers);
        var postbodies = document.querySelectorAll("td.postbody");
        for (let x of postbodies){
            var y = document.getElementById("threadamalgam");
            var newrow=y.appendChild(document.createElement("tr"));
            newrow.appendChild(x);
        }
        var posts = document.querySelectorAll("table.post");
        for (let x of posts){
            x.style.visibility="hidden";
        }
        threadamalgam.className=("post");
        document.body.style.visibility="visible";
        //document.addEventListener("mouseup", quoteScript);
        refreshIntoFalse();
    })


})();