"Exploring the world of 3rd party libraries in Angular2 with Typescript and Webpack

Question

"Exploring the world of 3rd party libraries in Angular2 with Typescript and Webpack

I've begun working on a fantastic seed project that can be found at: https://github.com/AngularClass/angular2-webpack-starter

However, I've encountered an issue with integrating third-party modules. Can anyone offer guidance on how to properly add and utilize external modules in this project?

For instance, when trying to incorporate 'immutable' using the following command:

npm install immutable --save

After installation, I attempted to import the module within a component like so:

import * as immutable from 'immutable';
import {List} from 'immutable';
import Immutable = require('immutable');

Despite my efforts, I continue to encounter the error TS2307: Cannot find module 'immutable'. The same issue arises when attempting to include modules such as 'moment'.

typescript angular webpack immutable.js

Answer 1

Answer №1

Ensure to include a typings file in your project located at

node_modules\immutable\dist\immutable.d.ts

. Make sure to reference it properly in your project, following this example:

/// <reference path="node_modules/immutable/dist/immutable.d.ts" />
import * as immutable from 'immutable';
import {List} from 'immutable';
import Immutable = require('immutable');

If you need typings for Moment, they can be found on DefinitelyTyped. I suggest using tsd for installation.

In case there are no available typings for a library you want to use, refer to this question for an alternative method. Keep in mind that you might not benefit from the advantages of Typescript in such cases.

Answer 2

Ensure to include a typings file in your project located at

node_modules\immutable\dist\immutable.d.ts

. Make sure to reference it properly in your project, following this example:

/// <reference path="node_modules/immutable/dist/immutable.d.ts" />
import * as immutable from 'immutable';
import {List} from 'immutable';
import Immutable = require('immutable');

If you need typings for Moment, they can be found on DefinitelyTyped. I suggest using tsd for installation.

In case there are no available typings for a library you want to use, refer to this question for an alternative method. Keep in mind that you might not benefit from the advantages of Typescript in such cases.

Answer 3

Answer №2

Update: Insert the following code snippet into your main.ts file.

import 'immutable'

By including this in your main.ts file, you will have easy access to the immutable API across all your components without the necessity of extra imports.

Answer 4

Update: Insert the following code snippet into your main.ts file.

import 'immutable'

By including this in your main.ts file, you will have easy access to the immutable API across all your components without the necessity of extra imports.

Answer 5

Answer №3

Here's a potential solution for individuals utilizing a third-party (npm) JavaScript module without typings definitions who wish to resolve the "cannot find module" error:

Let's say you are using the npm package jsonapi-serializer and including it in your example.ts file:

import {Serializer, Deserializer} from "jsonapi-serializer";

@Injectable()
export class ExampleService {
  var deserializer = new Deserializer({ keyForAttribute: 'camelCase'});
}

Your compiler will display an error message:

Error:(1, 40) TS2307:Cannot find module 'jsonapi-serializer'.

To address this issue, you can generate your own typings definition by creating a file named jsonapi-serializer.d.ts. In this file, outline the main functions using the any type to keep it straightforward. (You may want to consider contributing the definition file to DefinitelyTyped if you come up with a comprehensive definition):

declare module 'jsonapi-serializer' {

    export class Serializer {
        constructor(type: string, ...options: any[]);
        serialize(arg: any)
    }

    export class Deserializer {
        constructor(...options: any[]);
        deserialize()
    }
}

By adding this file to your project, the compiler will acknowledge the module. If this method fails, you can also reference it from your ExampleService.ts file by including the following line at the beginning of the file:

///<reference path="jsonapi-serializer.d.ts"/>

Answer 6

Here's a potential solution for individuals utilizing a third-party (npm) JavaScript module without typings definitions who wish to resolve the "cannot find module" error:

Let's say you are using the npm package jsonapi-serializer and including it in your example.ts file:

import {Serializer, Deserializer} from "jsonapi-serializer";

@Injectable()
export class ExampleService {
  var deserializer = new Deserializer({ keyForAttribute: 'camelCase'});
}

Your compiler will display an error message:

Error:(1, 40) TS2307:Cannot find module 'jsonapi-serializer'.

To address this issue, you can generate your own typings definition by creating a file named jsonapi-serializer.d.ts. In this file, outline the main functions using the any type to keep it straightforward. (You may want to consider contributing the definition file to DefinitelyTyped if you come up with a comprehensive definition):

declare module 'jsonapi-serializer' {

    export class Serializer {
        constructor(type: string, ...options: any[]);
        serialize(arg: any)
    }

    export class Deserializer {
        constructor(...options: any[]);
        deserialize()
    }
}

By adding this file to your project, the compiler will acknowledge the module. If this method fails, you can also reference it from your ExampleService.ts file by including the following line at the beginning of the file:

///<reference path="jsonapi-serializer.d.ts"/>

"Exploring the world of 3rd party libraries in Angular2 with Typescript and Webpack

Answer №1

Answer №2

Answer №3

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