added feature 3 code, which helps to turn on and off the bicycle lane

Author: bhuveshsharma09

flask_googlemaps/__init__.py

@@ -49,6 +49,7 @@ def __init__(
         clickpos_uri="",
         styles="",
         layer="",
+        bicycle_layer=False,
         **kwargs
     ):
         """Builds the Map properties"""
@@ -91,6 +92,7 @@ def __init__(
         self.fit_markers_to_bounds = fit_markers_to_bounds
         self.styles = styles
         self.layer = layer
+        self.bicycle_layer = bicycle_layer
 
 
     def build_markers(self, markers):

flask_googlemaps/templates/googlemaps/gmapjs.html

@@ -63,6 +63,13 @@
         map: {{gmap.varname}},
          });
 
+        // add bicycle layer
+        {% if gmap.bicycle_layer %}
+                const bicycleLayer = new google.maps.BicyclingLayer();
+                bicycleLayer.setMap({{gmap.varname}});
+        {% endif %}
+
+
         // add gmap markers
         var raw_markers = {{gmap.markers|tojson|safe}};
         for(i=0; i<{{gmap.markers|length}};i++) {