immobilienscout_plus_plus.user.js

// ==UserScript==
// @name        immobilienscout++
// @namespace   kch42
// @include     https://www.immobilienscout24.de/*
// @version     2
// @grant       none
// ==/UserScript==

/*
 * Immobilienscout24 Suche verbessern.
 * Im Moment wird die Warmmiete in den Suchergebnissen angezeigt.
 */

function mkcrit(title, value) {
  var nc = document.createElement("dl");
  nc.classList.add("grid-item", "result-list-entry__primary-criterion");
  
  var dd = document.createElement("dd");
  dd.classList.add("font-nowrap", "font-highlight", "font-tabular");
  dd.textContent = value;
  // dd.style.fontSize = "75%";

  var dt = document.createElement("dt");
  dt.classList.add("font-tabular", "onlyLarge", "font-xs", "font-lightgray", "attribute-label");
  dt.textContent = title;

  nc.appendChild(dd);
  nc.appendChild(dt);
  
  return nc;
}

function procresult(result) {
  if(result.classList.contains("isplusplus_processed")) {
    return;
  }
  
  var url = result.querySelector("a.result-list-entry__brand-title-container").getAttribute("href");
  var req = new XMLHttpRequest();
  req.addEventListener("load", function() {
    var doc = this.responseXML;
    console.log(doc);
    var warmmiete = doc.querySelector(".is24qa-gesamtmiete");
    console.log(warmmiete);
    var criteriaContainer = result.querySelector(".result-list-entry__criteria > div > .grid");

      //.appendChild(mkcrit("Warmmiete", warmmiete ? warmmiete.textContent : "?"));
      criteriaContainer.insertBefore(mkcrit("Warmmiete", warmmiete ? warmmiete.textContent : "?"), criteriaContainer.children[1]);

    result.classList.add("isplusplus_processed")
  });
  req.open("GET", url);
  req.responseType = "document";
  req.send();
}

var results = document.querySelectorAll("#resultListItems > li.result-list__listing");
for (var i = 0; i < results.length; i++) {
  procresult(results[i]);
}

Original script from: https://gist.github.com/silvasur/c93215dbe87593e4bd25