JESUS CHRIST

// ==UserScript==
// @name         4chanx set 'Prefetch Images'
// @namespace    http://tampermonkey.net/
// @version      0.1
// @description  it tries to do the thing (you must enable 'Image prefetching')
// @author       justrunmyscripts
// @require      https://cdnjs.cloudflare.com/ajax/libs/babel-standalone/6.18.2/babel.js
// @require      https://cdnjs.cloudflare.com/ajax/libs/babel-polyfill/6.16.0/polyfill.js
// @require      https://cdnjs.cloudflare.com/ajax/libs/jquery/3.1.1/jquery.min.js
// @match        http://boards.4chan.org/*/thread/*
// @grant        none
// ==/UserScript==

/* jshint ignore:start */
var inline_src = (<><![CDATA[
    /* jshint ignore:end */
    /* jshint esnext: false */
    /* jshint esversion: 6 */
    $.noConflict();

    document.addEventListener('4chanXInitFinished', (e)=> {
      window.setTimeout( ()=>{
        console.log("hello there!, some JS has been run on this page! (checking your 'prefetch images' checkbox!, check it out yourself!)");
        jQuery('#shortcut-menu > .menu-button').click();
        jQuery('input[type=checkbox][name=prefetch]').click();
        jQuery('#shortcut-menu > .menu-button').click();
      }, 1000);
    }, false);

    /* jshint ignore:start */
]]></>).toString();
var c = Babel.transform(inline_src, { presets: [ "es2015", "es2016" ] });
eval(c.code);
/* jshint ignore:end */