8chan - global gallery mod

Modifies the advanced media viewer (turn it on in site's settings) to consider the whole thread its gallery, not just the post, also ads focus to image you open with arrow keys

You will need to install an extension such as Tampermonkey, Greasemonkey or Violentmonkey to install this script.

You will need to install an extension such as Tampermonkey to install this script.

You will need to install an extension such as Tampermonkey or Violentmonkey to install this script.

You will need to install an extension such as Tampermonkey or Userscripts to install this script.

You will need to install an extension such as Tampermonkey to install this script.

You will need to install a user script manager extension to install this script.

(I already have a user script manager, let me install it!)

You will need to install an extension such as Stylus to install this style.

You will need to install an extension such as Stylus to install this style.

You will need to install an extension such as Stylus to install this style.

You will need to install a user style manager extension to install this style.

You will need to install a user style manager extension to install this style.

You will need to install a user style manager extension to install this style.

(I already have a user style manager, let me install it!)

// ==UserScript==
// @name         8chan - global gallery mod
// @namespace    8chan_ggm
// @version      2026-07-31
// @description  Modifies the advanced media viewer (turn it on in site's settings) to consider the whole thread its gallery, not just the post, also ads focus to image you open with arrow keys
// @author       Owyn
// @match        https://8chan.moe/*
// @match        https://8chan.st/*
// @match        http://alephchvkipd2houttjirmgivro5pxullvcgm4c47ptm7mhubbja6kad.onion/*
// @grant        unsafeWindow
// @run-at       document-start
// @sandbox      JavaScript
// @compatible   Chrome
// @compatible   Firefox
// ==/UserScript==

(function() {
    'use strict';

    // mediaLink.closest('.panelUploads')?.querySelectorAll('.imgLink') // - how gallery is populated
    const originalClosest = unsafeWindow.Element.prototype.closest;
    if(typeof exportFunction === "function")
    {
        wrapper_closest = exportFunction(wrapper_closest , unsafeWindow); // TM magic
    }
    unsafeWindow.Element.prototype.closest = wrapper_closest;
    function wrapper_closest (selectors) {
        if(selectors == ".panelUploads")
        {
            console.log(`they wanted Closest [${selectors}] but we returned doc.body and focused this:`, this);
            this.scrollIntoView();
            return document.body;
        }
        else return originalClosest.call(this, selectors);
    };
})();