问题

I am working with angular2-google-maps and latest version of Angular2. I am trying to convert some of the local map component functions into services in their own file maps.service.ts. For example:

map.component.ts

getGeoLocation(lat: number, lng: number) {
if (navigator.geolocation) {
    let geocoder = new google.maps.Geocoder();
    let latlng = new google.maps.LatLng(lat, lng);
    let request = { latLng: latlng };
    geocoder.geocode(request, (results, status) => {
      if (status == google.maps.GeocoderStatus.OK) {
        let result = results[0];
        if (result != null) {
          this.fillInputs(result.formatted_address);
        } else {
          alert("No address available!");
        }
      }
    });
}
}

Into something like: maps.service.ts

getGeoLocation(lat: number, lng: number): Observable<google.maps.GeocoderResult[]> {
    let geocoder = new google.maps.Geocoder();
    let latlng = new google.maps.LatLng(lat, lng);
    let request = { latLng: latlng };
    return new Observable((observer: Observer<google.maps.GeocoderResult[]>) => {
        geocoder.geocode({ request }, (
            (results: google.maps.GeocoderResult[], status: google.maps.GeocoderStatus) => {
                if (status == google.maps.GeocoderStatus.OK) {
                    observer.next(results);
                    observer.complete();
                } else {
                    console.log('Geocoding service failed due to: ' +status);
                    observer.error(status);
                }
            }
        ));
    });
}

The issue I'm getting is that google variable is not being recognized when I try to use Observer<google.maps.GeocoderResult[]>. I have declare var google: any; outside of the service class as well.

The google variable works in my map.componenet.ts but doesn't get recognized in the maps.service.ts.

回答1:

I was facing the same problem I tried :

declare var google: any;

But it didn't work for me .
I found this answer and it worked for me .
First make sure you installed the typings for google maps
npm install @types/googlemaps --save --dev

--dev flag is deprecated. Use npm install @types/googlemaps --save-dev

And Then in your Controller

import {} from '@types/googlemaps';

回答2:

Angular 6 & 7 steps (should also work for every other Angular version):

npm install @types/googlemaps --save-dev
Add googlemaps to the types array in tsconfig.app.json respectively in tsconfig.spec.json
Restart npm server

In the end should look like this:

You can delete both declaration types from the components: import {} from '@types/googlemaps'; declare var google: any; You don't have to include any of them.

PS: If you are using agm-s GoogleMapsAPIWrapper.getNativeMap() you must convert the map object before you use it. For example turning on the traffic layer:

this.apiWrapper.getNativeMap().then(map => {
    this.trafficLayer = new google.maps.TrafficLayer();
    const gMap: any = map;
    this.trafficLayer.setMap(gMap as google.maps.Map);
});

回答3:

Add

declare var google: any;

after the TypeScript imports

See also https://github.com/SebastianM/angular2-google-maps/issues/689

回答4:

To prevent more suffering of anyone else with this issue.

npm install @google/maps

https://www.npmjs.com/package/@google/maps

THEN:

import { google } from '@google/maps';

Basically we're importing the google object from the package @google/maps.

Tested in 2018 after @types/googlemaps stopped working.

回答5:

It is working for me also:

First install the typings for google maps in cmd on root of project

npm install @types/googlemaps --save --dev

And then add in your .ts component file below:

import {} from '@types/googlemaps';

回答6:

I finally figured out the problem, which I didn't know was a thing. My component that I was referencing the services in was named map.component.ts while my services file was named maps.service.ts with the s at the end of map. After I changed the file and import statements everything worked fine.

回答7:

I have a similar problem with Angular 6, and I did all the possible solutions mentioned above but no luck. Finally, I manage to solve this problem by adding googlemaps into types inside tsconfig.app and tsconfig.spec files. Hope it helps for others.

回答8:

In my case, I have defined the map components as below:

map: google.maps.Map;
infoWindow: google.maps.InfoWindow = new google.maps.InfoWindow();
marker: google.maps.Marker;
autocomplete: google.maps.places.Autocomplete;
panaroma: google.maps.StreetViewPanorama;

The issue was resolved by changing all components type to any as below:

map: any;
infoWindow = new google.maps.InfoWindow();
marker: any;
autocomplete: any;
panaroma: any;

回答9:

In my case I was getting 2 types of errors:

Cannot find namespace google
Cannot find name google

Since in my code I am using:

let autocomplete = new google.maps.places.Autocomplete(...)

let place: google.maps.places.PlaceResult = autocomplete.getPlace();

So fixed it by adding this:

declare var google: any;

declare namespace google.maps.places {
    export interface PlaceResult { geometry }
}

回答10:

`
import { Observable } from 'rxjs';
import { GoogleMapsAPIWrapper, MapsAPILoader } from '@agm/core';
import { Injectable, NgZone } from '@angular/core';
declare var google: any;

@Injectable({
  providedIn: 'root'
})
export class MapService extends GoogleMapsAPIWrapper {
  geocoder: Promise<any>;
  constructor(private __loader: MapsAPILoader, private __zone: NgZone) {
    super(__loader, __zone);
    this.geocoder = this.__loader.load().then(() => new google.maps.Geocoder());
  }

  getLatLan(address: string): Observable<any> {
    return Observable.create(observer => {
      this.geocoder.then((geocoder) => {
        geocoder.geocode({ 'address': address }, (results, status) => {
          if (status === google.maps.GeocoderStatus.OK) {
            observer.next(results[0].geometry.location);
            observer.complete();
          } else {
            console.error('Error - ', results, ' & Status - ', status);
            observer.next({});
            observer.complete();
          }
        });
      });
    });
  }
}`

This is a service with a method to get the address and return lan and lat.

回答11:

error: [ts] Cannot import type declaration files. Consider importing ‘googlemaps’ instead of ‘@types/googlemaps’

solution: change import {} from ‘@types/googlemaps’; for

/// <reference types=”@types/googlemaps” />

error: while compiling, error TS2304: Cannot find name ‘google’.

solution: add declare var google: any; below @types/googlemaps reference

error: while compiling error TS2503: Cannot find namespace ‘google’.

solution: Add to tsconfig.app.json : "types": ["googlemaps"] and restart

error: map doesn’t load correctly and in the web browser console you read “Google Maps Javascript API Warning: NoApiKeys”

solution: add a valid api key inside the javascript file in index.html, should look like this <script type=”text/javascript” src=”http://maps.googleapis.com/maps/api/js?key=YOUR_API_KEY_HERE"></script> you can get an API key from here https://developers.google.com/maps/documentation/javascript/get-api-key

来源：https://stackoverflow.com/questions/42394697/angular2-cannot-find-namespace-google

标签

google-maps