@types/googlemaps/index.d.ts' is not a module

问题

I want to use the Google Maps API with my Angular project, so I used these two commands to install npm packages:

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

I added this line to my component:

import {} from "@types/googlemaps";

But I see these 2 errors in VS Code:

[ts] File 'h:/Angular Projects/Breakfast/client/breakfast/node_modules/@types/googlemaps/index.d.ts' is not a module.
[ts] Cannot import type declaration files. Consider importing 'googlemaps' instead of '@types/googlemaps'.

I added these lines

"types": ["googlemaps"]
"moduleResolution": "node"

to tsconfig.json and tsconfig.spec.json, but still no luck. On Chrome Dev Tools, I see the below error:

Error: Uncaught (in promise): TypeError: Cannot read property 'Autocomplete' of undefined
TypeError: Cannot read property 'Autocomplete' of undefined

Angular version 6 Typescript Version 2.9.2

I tried from Angular 5, too.

回答1:

Thanks to this documentation link : https://www.typescriptlang.org/docs/handbook/triple-slash-directives.html

[Angular 6+] You only have to add this line at the beginning (meaning line 1, with nothing before) of your Typescript file :

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

[Angular 5-] You only have to add this line anywhere in your Typescript file imports :

import {} from "googlemaps";

Thanks to the answer below, you may also need to add a file <root>/index.d.ts containing (didn't need it though in my case) :

declare module 'googlemaps';

回答2:

The import can be simplified as follows:

import {} from "googlemaps";

Create a file at your projects root directory named index.d.ts and paste the following:

declare module 'googlemaps';

The created file needs to be located directory in the src folder

I found this article about what is the purpose of that file

https://www.bennadel.com/blog/3169-adding-custom-typings-files-d-ts-in-an-angular-2-typescript-application.htm

回答3:

I just created a index.d.ts in my src folder and added

declare module 'googlemaps';

It solved the issue

回答4:

It works fine

npm install --save-dev @types/googlemaps
At the beggining of your component file, type:
/// <reference types="@types/googlemaps" />

回答5:

For me in Angular 6, it worked when I only used

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

回答6:

In my angular 6+ project I've solved the problem declaring the googlemaps namespace in the top of the typescript file with this line:

/// <reference path="../../../../../../node_modules/@types/googlemaps/index.d.ts"/>

with this done you must not import googlemaps in other ways and then it works. Use the correct path to your node_modules folder.

For further information and references about namespace usage in Typescript here the documentation.

回答7:

In my Angular 7+ project

$ npm install @types/googlemaps --save-dev
In tsconfig.app.json

"types": [
      "googlemaps"
]

Thank you the link below https://www.freakyjolly.com/angular-7-6-add-google-maps-in-angular-2-plus-applications-using-angular-google-maps-module-agm-core-easily/#more-2316

来源：https://stackoverflow.com/questions/51084724/types-googlemaps-index-d-ts-is-not-a-module