Google Maps JavaScript API -用一种颜色显示未激活的替代路由，用另一种颜色显示激活的替代路由

当你"通过折线数组的路线、过程:

1. 设置所有路由的strokeColor为'grey'
2. 设置活动路由的折线颜色为"active";颜色

概念验证小提琴(基于我的例子，你参考，点击折线"激活";)

代码片段:

$(document).ready(function() {
  var markers = [{
    "title": '',
    "lat": '56.965969',
    "lng": '24.143496',
    "description": ''
  }, {
    "title": '',
    "lat": '56.966259',
    "lng": '24.385860',
    "description": ''
  }];
  var service = new google.maps.DirectionsService();
  var polyArray = [];
  var infoWindow = new google.maps.InfoWindow();
  var map = new google.maps.Map(document.getElementById("map_1"), mapOptions);
  var lat_lng = new Array();
  var colors = ['#ff0000', '#00ff00', '#0000ff', '#ffff00', '#ff00ff', '#00ffff'];
  var image = 'https://maps.google.com/mapfiles/ms/micons/blue.png';
  var marker = new google.maps.Marker({
    position: new google.maps.LatLng(56.966259, 24.385860),
    map: map,
    title: 'Sillava',
    icon: image
  });
  for (i = 0; i < markers.length; i++) {
    var data = markers[i];
    var myLatlng = new google.maps.LatLng(data.lat, data.lng);
    lat_lng.push(myLatlng);
  }
  for (var i = 0; i < lat_lng.length; i++) {
    if ((i + 1) < lat_lng.length) {
      var src = lat_lng[i];
      var des = lat_lng[i + 1];
      service.route({
        origin: src,
        destination: des,
        provideRouteAlternatives: true,
        travelMode: google.maps.DirectionsTravelMode.DRIVING
      }, function(result, status) {
        if (status == google.maps.DirectionsStatus.OK) {
          for (var j = 0; j < result.routes.length; j++) {
            var path = new google.maps.MVCArray();
            polyArray.push(new google.maps.Polyline({
              map: map,
              strokeColor: "grey",
              strokeOpacity: 0.3,
              strokeWeight: 5
            }));
            if (j == 0) polyArray[0].setOptions({
              strokeColor: '#00ff00',
              strokeOpacity: 1.0
            });
            polyArray[polyArray.length - 1].setPath(path);
            google.maps.event.addListener(polyArray[polyArray.length - 1], 'click', function() {
              for (var i = 0; i < polyArray.length; i++) {
                polyArray[i].setOptions({
                  strokeOpacity: 0.3,
                  strokeColor: "grey"
                });
              }
              this.setOptions({
                strokeOpacity: 1.0,
                strokeColor: "#00ff00"
              });
            })
            for (var i = 0, len = result.routes[j].overview_path.length; i < len; i++) {
              path.push(result.routes[j].overview_path[i]);
            }
          }
        }
      });
    }
  }
});
var mapOptions = {
  zoom: 11,
  center: new google.maps.LatLng(56.975749, 24.279310),
  scrollwheel: false,
  navigationControl: false,
  mapTypeControl: false,
  scaleControl: false,
  draggable: false,
  styles: [{
    "featureType": "water",
    "elementType": "geometry",
    "stylers": [{
      "color": "#d3d3d3"
    }, {
      "lightness": 17
    }]
  }, {
    "featureType": "landscape",
    "elementType": "geometry",
    "stylers": [{
      "color": "#f5f5f5"
    }, {
      "lightness": 20
    }]
  }, {
    "featureType": "road.highway",
    "elementType": "geometry.fill",
    "stylers": [{
      "color": "#ffffff"
    }, {
      "lightness": 17
    }]
  }, {
    "featureType": "road.highway",
    "elementType": "geometry.stroke",
    "stylers": [{
      "color": "#ffffff"
    }, {
      "lightness": 29
    }, {
      "weight": 0.2
    }]
  }, {
    "featureType": "road.arterial",
    "elementType": "geometry",
    "stylers": [{
      "color": "#ffffff"
    }, {
      "lightness": 18
    }]
  }, {
    "featureType": "road.local",
    "elementType": "geometry",
    "stylers": [{
      "color": "#ffffff"
    }, {
      "lightness": 16
    }]
  }, {
    "featureType": "poi",
    "elementType": "geometry",
    "stylers": [{
      "color": "#f5f5f5"
    }, {
      "lightness": 21
    }]
  }, {
    "featureType": "poi.park",
    "elementType": "geometry",
    "stylers": [{
      "color": "#dedede"
    }, {
      "lightness": 21
    }]
  }, {
    "elementType": "labels.text.stroke",
    "stylers": [{
      "visibility": "on"
    }, {
      "color": "#ffffff"
    }, {
      "lightness": 16
    }]
  }, {
    "elementType": "labels.text.fill",
    "stylers": [{
      "saturation": 36
    }, {
      "color": "#333333"
    }, {
      "lightness": 40
    }]
  }, {
    "elementType": "labels.icon",
    "stylers": [{
      "visibility": "off"
    }]
  }, {
    "featureType": "transit",
    "elementType": "geometry",
    "stylers": [{
      "color": "#f2f2f2"
    }, {
      "lightness": 19
    }]
  }, {
    "featureType": "administrative",
    "elementType": "geometry.fill",
    "stylers": [{
      "color": "#fefefe"
    }, {
      "lightness": 20
    }]
  }, {
    "featureType": "administrative",
    "elementType": "geometry.stroke",
    "stylers": [{
      "color": "#fefefe"
    }, {
      "lightness": 17
    }, {
      "weight": 1.2
    }]
  }]
};

.map {
  width: 100%;
  height: 100%;
}
body,
html {
  height: 100%;
  width: 100%;
}

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<script src="https://maps.googleapis.com/maps/api/js?key=AIzaSyCkUOdZ5y7hMm0yrcCQoCvLwzdM6M8s5qk"></script>
<div id="map_1" class="map"></div>