Raw Source
gabriel_tosh / comments-under-spoilers 

// ==UserScript==
// @name         comments-under-spoilers
// @namespace    http://tampermonkey.net/
// @version      0.1
// @license      MIT
// @description  Hide comments of Evo-lutio under spoilers
// @author       https://gabrieltosh.livejournal.com
// @include      https://evo-lutio.livejournal.com/*
// @grant        none
// ==/UserScript==

(function() {
    'use strict';
    var post = document.querySelector(".b-singlepost-body");
    var post_text = post.innerHTML;
    var start_tag = '<span class="lj-spoiler"><span class="lj-spoiler-head"><span class="lj-spoiler-leftbracket">[</span><strong><a href="javascript:void(0)"><svg xmlns="http://www.w3.org/2000/svg" width="18" height="12" class="flaticon flaticon--eye lj-spoiler-icon" style="display: none; fill: currentColor"><use xlink:href="#flaticon--eye"></svg>Комментарий Эволюции</a></strong><span class="lj-spoiler-rightbracket">]</span></span><span class="lj-spoiler-body"><strong>';
    var end_tag = '</strong></span></span>';
    post_text = post_text.replace("<b>", "<__>");
    post_text = post_text.replace("</b>", "</__>");
    post_text = post_text.replace(/<b>/g, start_tag).replace(/<\/b>/g, end_tag);
    post_text = post_text.replace("<__>", "<b>");
    post_text = post_text.replace("</__>", "</b>");
    post.innerHTML = post_text;
})();