text: function init() {
    var tileUrl = 'http://b.tile.openstreetmap.org/{z}/{x}/{y}.png';
    var tileOptions = {
      attribution: '&copy; <a href="http://osm.org/copyright">OpenStreetMap</a> contributors',
      subdomains: '1234'
    };
  
    var map = new L.Map('map', {
      center: [50.0, 10.0],
      zoom: 5,
      layers: [
        L.tileLayer(tileUrl, tileOptions)
      ]
    });
  
    var magnifyingGlass = L.magnifyingGlass({
      zoomOffset: 3,
      layers: [
        L.tileLayer(tileUrl, tileOptions)
      ],
      map: map,
      title: 'Magnifying glass'
    });
  }
  
  window.onload = init;
  