错误错误：未捕获（承诺）：ReferenceError：未定义谷歌

Question

我在我的项目中使用 Angular 2 + Google Maps Places Autocomplete 它给了我这个错误：

错误错误：未捕获（承诺中）：ReferenceError：未定义谷歌

这里是html：

  <agm-map  id="googleMap">

  </agm-map>

组件：

 ngOnInit() {
    var p1 = new google.maps.LatLng(45.463688, 9.18814);
    var p2 = new google.maps.LatLng(46.0438317, 9.75936230000002);

    let  directionsService = new google.maps.DirectionsService;
    let  directionsDisplay = new google.maps.DirectionsRenderer;
    let mapProp = {
        center:{lat:  30.42018, lng: -9.5981500},
        zoom: 5,
        mapTypeId: google.maps.MapTypeId.ROADMAP 
    };
    let map = new google.maps.Map(document.getElementById("googleMap"), mapProp);
    directionsDisplay.setMap(map);
    this.calculateAndDisplayRoute(directionsService, directionsDisplay);
//set google maps defaults
this.zoom = 4;
this.latitude = 39.8282;
this.longitude = -98.5795;

//create search FormControl
this.searchControl = new FormControl();

//set current position
//this.setCurrentPosition();

  var options = {
  types: ['(cities)'],
  componentRestrictions: {country: "ma"}
  };
  //load Places Autocomplete
  this.mapsAPILoader.load().then(() => {
  let autocomplete = new 
  google.maps.places.Autocomplete(this.searchElementRef.nativeElement, 
  options);

  });
 }

模块：

 imports: [
   AgmCoreModule.forRoot({
  apiKey: "MyOWNKEY",
  libraries: ["places"]
}),

顺便说一下，我使用的是 AGM（Angular Google Maps）

Answer 1

    declare var google.

把它放在组件的顶部。

当然，还要确保您在 Angular 的 index.html 页面顶部添加了谷歌地图脚本