Leverage a JavaScript library with TypeScript in Angular 2

SignalR integration in my Ionic/Angular 2 application has been a challenge.

I'm creating a basic Hub setup as follows: 

const accessToken = authManager.getRawAccessToken();

let hubUrl = environment.baseUrl + 'messages';
if (accessToken) {
    hubUrl += '?authToken=' + accessToken;
}

this._hubConnection = new HubConnectionBuilder()
                           .withUrl(hubUrl)
                           .build();

An error I keep encountering is:

'Cannot find name 'XMLHttpRequestResponseType'.

This issue is due to SignalR requiring a higher version of TypeScript which is not currently supported by Ionic. Refer to this link.

I realized that SignalR comes default with JavaScript. Is it possible to modify the Import statement like this?

import { HubConnection, HubConnectionBuilder } from '@aspnet/signalr';

So that I can import JavaScript into a TypeScript file without any issues?

Edit I also attempted:

import * as SignalR from '@aspnet/signalr';

However, it seems to still utilize the typings file.

javascriptangulartypescriptsignalr

Answer №1

Is it better to opt for JavaScript instead of TypeScript?

Utilize the raw require: 

const { HubConnection, HubConnectionBuilder } = require('@aspnet/signalr');

The typings for require can be obtained by running npm install @types/node 🌺

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