TypeError: You provided 'undefined' where a stream was expected

Question

I have an Ionic app that has a user provider with a signup() method:

doSignup() {
  // set         


        

Answer 1

I did face this issue and in my case responseType suppose to be text (because of designed API end-point) rather than default json.

import { HttpClient } from '@angular/common/http';

Before:

getToken(tokenCommand) {
    return this.http.post(API_BASE_URL + 'user/token', tokenCommand);
}

After fixed:

getToken(tokenCommand) {
    return this.http.post(API_BASE_URL + 'user/token', tokenCommand
                                                     , { responseType: 'text' });
}

I think this error message is too general and it will be nice if it's developers could provide more detail/helpful error message. Thanks.