Replace square images displayed on pixiv.net with full-size images

pixiv-full-image.user.js

// ==UserScript==
// @name         pixiv replace full image
// @namespace    https://tomacheese.com
// @version      1.0.1
// @description  Replace square images displayed on pixiv.net with full-size images
// @author       Tomachi
// @match        https://www.pixiv.net/*
// @icon         https://www.google.com/s2/favicons?sz=64&domain=pixiv.net
// @updateURL    https://gist.github.com/book000/0326c9b0635d99b7c4ab891ccb5e67be/raw/pixiv-full-image.user.js
// @downloadURL  https://gist.github.com/book000/0326c9b0635d99b7c4ab891ccb5e67be/raw/pixiv-full-image.user.js
// @grant        none
// ==/UserScript==

(function() {
    'use strict';

    setInterval(() => {
        const regex =
              /https:\/\/i\.pximg\.net\/c\/[a-z0-9_]+\/(?:custom-thumb|img-master)\/img\/([0-9\/]+)\/([0-9_p]+)_(?:custom|square)1200\.jpg/;
        document.querySelectorAll('div[type="illust"] div.fxGVAF').forEach((div) => {
            const img = div.querySelector('img');
            if(!img) return;
            const match = regex.exec(img.src);
            if (!match) {
                console.log("no match", img.src);
                return;
            }
            const newUrl = `https://i.pximg.net/c/600x1200_90/img-master/img/${match[1]}/${match[2]}_master1200.jpg`;
            img.src = newUrl;

            // remove fxGVAF class
            div.classList.remove("fxGVAF");
        });
    }, 300)
})();