Setting up TypeScript in an Angular 2 project and integrating Facebook login

Currently, I am in the process of familiarizing myself with Angular 2 and typescript. Although things have been going smoothly so far, I have hit a roadblock while attempting to implement a Facebook login message. In my search for a solution, I stumbled upon a project that showcases how this can be achieved on github here. The key component in their demonstration is:

fbconnector.ts

export class FBConnector {

    constructor(appID: string) {
        if (!window.fbAsyncInit) {
            console.log('define');
            window.fbAsyncInit = function() {
                FB.init({
                    appId: appID,
                    xfbml: true,
                    version: 'v2.5'
                });
            };
        }
    }

    initFB() {
        var js: any,
            id = 'facebook-jssdk',
            ref = document.getElementsByTagName('script')[0];

        if (document.getElementById(id)) {
            return;
        }

        js = document.createElement('script');
        js.id = id;
        js.async = true;
        js.src = "//connect.facebook.net/en_US/sdk.js";

        ref.parentNode.insertBefore(js, ref);
    }

}

During the compilation of my typescript, I encountered two errors:

error TS2339: Property fbAsyncInit does not exist on type 'Window'.
error TS2304: Cannot find name 'FB'.

Upon reflection, it became apparent that these mistakes were due to missing variable definitions required by typescript. As someone new to typescript, I am uncertain about the correct approach to remedy this situation. Should I create a custom typings file or resort to workarounds like adding "any" in front of window? Any guidance would be greatly appreciated!

Thank you in advance!

Answer №1

After some searching, I finally discovered that DefinitelyTyped provides type definitions for the Facebook JavaScript SDK (here).

All I needed to do was include the file and reference it in my code using the following line at the beginning of my script:

/// <reference path="../../../typings/main/ambient/fbsdk/index.d.ts" />

Answer №2

To add typings, simply run: typings install -SG dt~fbsdk

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