SignalR Integration Issue in Angular2 (Typescript) - Import Troubleshooting

I've encountered some issues while trying to implement signalR in my Angular2-Typescript application. Previously, I had no trouble using it in an Angular 1 app. The problem seems to lie in the importing process.

While I do have intellisense working, the strong typing doesn't seem to align properly with the original JavaScript file.

Within the node_modules folder, I have these two abbreviated directory structures:

├───jquery
│   │   jquery.d.ts
│   │   LICENSE.txt
│   │   package.json
│   │   README.md
│   │
│   ├───dist
│   │       core.js
│   │       jquery.js
│
└───signalr
        jquery.signalR.js
        jquery.signalR.min.js
        package.json
        signalr.d.ts

The content of jquery.d.ts can be found here: https://github.com/DefinitelyTyped/DefinitelyTyped/blob/master/jquery/jquery.d.ts

The signalr.d.ts file can be accessed here: https://github.com/DefinitelyTyped/DefinitelyTyped/blob/master/signalr/signalr.d.ts

Important: I had to modify the signalr.d.ts file by adding the following lines at the end in order to make it importable:

declare var sr : JQueryStatic;

declare module 'signalr'{
    export = sr;
}

In my systemjs.config.js, I use the following to import signalr:

map: {
'signalr': 'npm:signalr/jquery.signalR.js'
}

Then, in my component, I use the following import statement:

import * as $ from 'signalr'

Subsequently, I am able to use intellisense, such as demonstrated here:

https://i.sstatic.net/apzo0.png

However, there are lingering issues. When I execute:

console.log($.hubConnection);

The output is undefined.

I would greatly appreciate any assistance with resolving this matter.

Answer №1

Here is a suggestion for you to try out:

map: {
      'ms-signalr-client': 'npm:ms-signalr-client/jquery.signalR.min.js',
      'jquery': 'npm:jquery/jquery.min.js'
}

Implement this in your TypeScript file:

    import 'ms-signalr-client';
    import * as $ from 'jquery'; 
    ...
    $.hubConnection
    ...

I hope this information proves to be helpful to you.

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