Error: Can't access the 'http' property because it's undefined in Angular 2

Recently, I successfully integrated the gapi client into my Angular 2 application. However, I am now facing an issue where my http object is showing as undefined and I can't seem to figure out why.

Here's the snippet of code that's causing the problem: constructor(private http: Http ) {}

initGmailApi() {

gapi.auth2.getAuthInstance().grantOfflineAccess().then(function(resp) {
    console.log(resp);
    const auth_code = resp.code;

    const body = {'AuthCode': auth_code};
    const headers = new Headers();
    headers.append('Content-Type', 'application/json');
    this.http.post('http://localhost:8080/startgmail', body,  headers).subscribe(
    (Response) => {
        console.log(Response);
    }
    );
});
}

Essentially, what I'm trying to accomplish here is to request permission from the user to access their Gmail account. Once I receive a response, I want to send some data to my backend server.

The issue arises when I try to use this.http outside of the "then" clause - then the http method works fine but creates another problem where the value of "auth_code" is not recognized.

Any insights on what might be missing in my implementation?

Answer №1

To access `this` in the callback, avoid using `function() {}`

Instead, opt for arrow functions:

then((response) => {

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