other methods

1. change map colors
   

         
                 const darkmap = new maps.StyledMapType(styledMap, {name: 'Dark Map'});
                 this.map.mapTypes.set('dark_map', darkmap);
                 this.map.setMapTypeId('dark_map');
               
             

2. set focus buttons
   

         
                 London
                 focus() {
                    this.map.setCenter(this.coords(51.5616, -0.14));
                 }