hidden spam on Hatena::Let w/ Pager Extension for UserScript

hatenalet-spamfilter.user.js

// ==UserScript==
// @name        Hatena::Let spam filter
// @namespace   http://noromanba.flavors.me
// @description hidden spam on Hatena::Let w/ Pager Extension for UserScript
// @include     http://let.hatelabo.jp/*
// @grant       none
// @noframes
// @run-at      document-end
// @version     2016.3.4.1
// @homepage    https://gist.github.com/noromanba/e2fcfb01b2be8a12be79
// @downloadURL https://gist.github.com/noromanba/e2fcfb01b2be8a12be79/raw/hatenalet-spamfilter.user.js
// @contributor a-kuma3 http://let.hatelabo.jp/a-kuma3/let/hJme3Kz9g6Zc (Fork of)
// @license     MIT License http://nrm.mit-license.org/2016
// @author      noromanba   http://noromanba.flavors.me
// @icon        https://upload.wikimedia.org/wikipedia/commons/thumb/d/d6/ISO_7010_M017.svg/32px-ISO_7010_M017.svg.png
// @icon64      https://upload.wikimedia.org/wikipedia/commons/thumb/d/d6/ISO_7010_M017.svg/64px-ISO_7010_M017.svg.png
// ==/UserScript==

// Icon (PD by BAuA http://www.baua.de /ISO 7010)
// https://commons.wikimedia.org/wiki/File%3AISO_7010_M017.svg

// Bookmarklet
// http://let.hatelabo.jp/noromanba/let/hLHUwYu31Z5O

// Devel
// https://gist.github.com/noromanba/e2fcfb01b2be8a12be79


// feedback to Hatena c.f.
// http://www.hatena.ne.jp/faq/q/let
// http://let.hatelabo.jp/noromanba/let/hLHW16C50Zpx

// Hatena Question spam-filter
// http://let.hatelabo.jp/noromanba/let/hLHWrvnr8Mlx

// spammer report c.f.
// http://ptech.g.hatena.ne.jp/noromanba/20141126/1417027101
// http://ptech.g.hatena.ne.jp/noromanba/20150105/1420463835

(() => {
    // valid js url patterns; String, url(), RegExp c.f.
    //  https://developer.mozilla.org/en/docs/Web/JavaScript/Reference/Global_Objects/RegExp
    //  https://en.wikipedia.org/wiki/Regular_expression
    //  http://yut.hatenablog.com/entry/20110305/1299318337
    // TBD \cX \xhh \uhhhh
    const invalidURL = /(?:^|[^"'\s\/^.\\dwstrnvfb0\[\]^|$()?:*{},=!])(?:https?:)+/i;

    const wipeout = (ctx) => {
        Array.from(ctx.querySelectorAll('.codelist'), (list) => {
            const packed = list.querySelector('.packed-source');
            const title = (list.querySelector('.title .code-path') || {});

            if (!packed || // XXX violate @require only src
                title.textContent === 'no title' ||
                invalidURL.test(packed.textContent)) {
                //*
                list.style.display = 'none';
                /*/
                list.style.backgroundColor = 'red';
                //*/
            }
        });
    };
    wipeout(document.body);

    // for Pager Extensions
    new MutationObserver((records) => {
        records.forEach((record) => {
            wipeout(record.target);
        });
    }).observe(document.body, { childList: true, subtree: true });
})();