userscript for tapermonkey, adds a link to search the title of the book on libgen

zlib2libgen.user.js

// ==UserScript==
// @name         z-lib to libgen
// @namespace    http://tampermonkey.net/
// @version      0.2
// @description  z-lib to libgen
// @author       dobrosketchkun
// @include      https://*/*
// @icon         https://www.google.com/s2/favicons?domain=3lib.net
// @grant        none
// ==/UserScript==

(function() {
    'use strict';

    var asin = document.getElementsByClassName("footer-mailto")[0].getAttribute("href");
    if (asin=="mailto: support@bookmail.org") {

        var title = document.getElementsByClassName("col-sm-9")[0].childNodes[0].nextElementSibling.firstChild.data.trim();

        var button = document.querySelector("div.bcNav");

        var a = document.createElement("a");
        a.setAttribute("href", "https://libgen.is/search.php?req=" + title + "&lg_topic=libgen&open=0&view=simple&res=25&phrase=1&column=def");
        a.setAttribute("target", "_blank");
        a.appendChild(document.createTextNode("   Search on libgen"));

        button.appendChild(a);

    }


})();