Uncaught TypeError: Cannot read property 'get' of undefined with Angular's http.get

Question

For a test I have the following code added to my test.ts, which I included in the main.ts.

var http:Http;
let headers = new Headers();
headers.set('Accept', 'text/json');
let url = 'http://localhost:8080/usersdto';

http.get(url, { headers})
  .subscribe(resp => showResponse(resp), err => showResponse(err));

So this is no Class, just typescript. I get the error pointing to line 'http.get' (showResponse exists as function):

Uncaught TypeError: Cannot read property 'get' of undefined

Why do I get this Error and how do I define the http object correctly ?

user10566035 · Accepted Answer · 2019-01-10 17:59:52Z

1

First you need to import HttpClient from @angular/common/http. Then you define the http object by injecting it into the constructor of the class you want to use it in.

All of what you need and best practices are explained in this example.

Hope that helps.

answered Jan 10, 2019 at 17:59

user10566035

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2 Comments

mcfly soft Over a year ago

So I can't do it like I did for testing only ?

user10566035 Over a year ago

HttpClient is available as an injectable class, so there's no way to use it without injecting it.

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