Tampermonkey: Never Login to Reddit

never_login_to_reddit.js

// Want to browse reddit but never make a reddit account?
// Sick of reddit trying to force you to login to see NSFW content?
// This script will let you browse reddit as you please, and whenever you
// encounter a page demanding your to login, it will automatically swap your page to the
// old.reddit.com version, which doesn't force a login.

// ==UserScript==
// @name         Anti-reddit login
// @namespace    http://tampermonkey.net/
// @version      0.1
// @description  try to take over the world!
// @author       exo-pla-net
// @match        https://www.reddit.com/*
// @icon         https://www.google.com/s2/favicons?sz=64&domain=reddit.com
// @grant        none
// ==/UserScript==

(function() {
    'use strict';

function sleepForMilliseconds(milliseconds) {
  return new Promise(resolve => {
    setTimeout(() => {
      resolve('resolved');
    }, milliseconds);
  });
}

function swapToOld(){
    let currentUrl = window.location.href
    let oldUrl = currentUrl.replace('www', 'old')
    window.location.replace(oldUrl);
}


async function main(){
    console.log("Checking for 18 year old wall...")
    let buttons = null
    while(true){
        buttons = document.querySelectorAll("button");
        if (buttons.length > 0) break;
        console.log("Page is still loading...")
        await sleepForMilliseconds(100)
    }
    buttons = [...buttons]; // convert to array

    let button18wall = null
    for(let i=0 ; i<buttons.length; i++){
        console.log(buttons[i]);
        if (buttons[i].textContent.trim() === "I'm not over 18")
                button18wall = buttons[i];
    }
    if(button18wall!=null)
        swapToOld();
}

main();
})();