index.html

<!DOCTYPE html>
<html>
<head>
  <meta http-equiv="content-type" content="text/html; charset=UTF-8">
  <meta name="author" content="Christoph Friedrich">
  <title>usable-wg-gesucht</title>
  <!-- jQuery for painless ajaxing and eventing -->
  <script src="https://code.jquery.com/jquery-3.1.1.min.js"></script>
  <!-- Leaflet stuff -->
  <link rel="stylesheet" href="https://unpkg.com/leaflet@1.0.3/dist/leaflet.css" />
  <script src="https://unpkg.com/leaflet@1.0.3/dist/leaflet.js"></script>
  <!-- own stuff -->
  <link rel="stylesheet" href="style.css" />
  <script src="wggesucht.js"></script>
  <script src="app.js"></script>
</head>
<body>
  <button onclick="crawl()">Crawl</button>
  <h1>usable-wg-gesucht</h1>
  <div id="content">
    <div id="offers"></div>
    <div id="map"></div>
    <div id="details"></div>
  </div>
</body>
</html>