Userscript that adds a "is a transphobe?" link to every user profile on Twitter to quickly look up a person's position on transgender rights before interacting with them.

transphobesearch.user.js

// ==UserScript==
// @name         Twitter Transphobe Search
// @namespace    http://tampermonkey.net/
// @version      0.4
// @description  Find trans-related tweets from any public user
// @author       mxamber
// @match        https://twitter.com/*
// @icon         https://www.google.com/s2/favicons?domain=twitter.com
// @grant        none
// ==/UserScript==

(function() {
  'use strict';

  function searchUrl(wordsArray, username) {
    let returnUrl = "https://twitter.com/search?q=";
    for(let i = 0; i < wordsArray.length; i++) {
      returnUrl += wordsArray[i];
      if(i != wordsArray.length - 1) {
        returnUrl += "%20OR%20";
      }
    }
    returnUrl += "%20from%3A" + username + "&src=typed_query";
    return returnUrl;
  }
  
  function createLink(title, url, id, targetlink) {
    let returnLink = document.createElement("a");
    returnLink.href = url;
    returnLink.setAttribute("style", "margin-left: 1em; font-weight: bold; font-family: 'sans', 'Sans-Serif', 'Sans'; text-decoration: none; color: rgb(29, 161, 242); font-size: small;");
    returnLink.setAttribute("target", "_blank");
    returnLink.setAttribute("id", id);
    returnLink.innerHTML = title;
    if(!document.querySelector("#" + id)) {
      targetlink.parentNode.parentNode.appendChild(returnLink);
    }
  }

  function addLink() {
    if(document.querySelector("#transphobesearch_en") || document.querySelector("#transphobesearch_de")) {
      return;
    }
    let regexTweet = /status\/\d+/i;
    if(window.location.toString().match(regexTweet)) {
      return;
    }
    let targetlink = document.querySelectorAll("a[href*='followers']:not([href*='followers_you_follow'])")[0];
    if(!targetlink) {1
                     return;
                    }
    let reserved = ["notifications", "explore", "home", "messages", "bookmarks", "search"];
    let regexUser = /https?:\/\/(www\.)?twitter\.com\/([a-zA-Z0-9_-]*)/i;
    let username = window.location.toString().match(regexUser)[2];
    if(!username || reserved.indexOf(username) != -1) {
      return;
    }

    // don't make it any longer or the end will be truncated in the search, that's why there's two parts for the English search
    let searchterms_en = ["trans", "transgender", "transsexual", "gender-critical", "gender-crit", "terf", "transwoman", "transwomen", "transmen", "transman", "nonbinary", "non-binary", "\"non binary\""];
    let searchterms_en2 = ["Chappelle", "%23IStandWithJKRowling", "Self-ID", "\"sex-based rights\"", "\"Magdalen Berns\"", "\"Maya Forstater\""];
    let searchterms_de = ["trans", "transsexuell", "transgeschlechtlich", "Transfrau", "Transmann", "Transfrauen", "Transmänner", "nichtbinär", "nicht-binär", "Selbstbestimmungsgesetz"];

    let searchurl_en = searchUrl(searchterms_en, username);
    let searchurl_en2 = searchUrl(searchterms_en2, username);
    let searchurl_de = searchUrl(searchterms_de, username);
    
    createLink("Search for transphobia", searchurl_en, "transphobesearch_en", targetlink);
    createLink ("(more)", searchurl_en2, "transphobesearch_en2", targetlink);
    createLink ("(German)", searchurl_de, "transphobesearch_de", targetlink);
  }

  setInterval(addLink, 1500);
})();