Auto set over18 cookie on Reddit

reddit_over18.user.js

// ==UserScript==
// @name         Auto set over18 cookie on Reddit
// @namespace    http://tampermonkey.net/
// @version      0.1
// @description  Automatically sets the "over18" cookie to 1 on Reddit to bypass age verification
// @author       You
// @match        https://www.reddit.com/*
// @match        https://old.reddit.com/*
// @grant        GM_setValue
// @grant        GM_getValue
// ==/UserScript==

(function() {
    'use strict';

    function setOver18Cookie() {
        document.cookie = "over18=1; path=/; domain=reddit.com; expires=" + new Date(Date.now() + 365*24*60*60*1000).toUTCString();
    }
    function getOver18Cookie() {
        let name = "over18=";
        let decodedCookie = decodeURIComponent(document.cookie);
        let ca = decodedCookie.split(';');
        for(let i = 0; i < ca.length; i++) {
            let c = ca[i];
            while (c.charAt(0) == ' ') {
                c = c.substring(1);
            }
            if (c.indexOf(name) == 0) {
                return true; // over18 cookie exists
            }
        }
        return false; // over18 cookie doesn't exist
    }

    if ((window.location.hostname === 'www.reddit.com' || window.location.hostname === 'old.reddit.com') && !getOver18Cookie()) {
        setOver18Cookie();
        window.location.reload();
    }
})();