How to set up OAuth2 authorization from LinkedIn in Angular 5?

Question

JavaScript

Good day, help me set up user authorization using LinkedIn. The essence of the problem: the user is on the main page, there is a button, the user clicks on it and the linkedin window opens for him with a request to accept the conditions and give access to his profile information and he is redirected to another page. Following the documentation with making a GET request

https://www.linkedin.com/oauth/v2/authorization?response_type=code
    &client_id=86yqrscskh1acr&redirect_uri=http://localhost:4200&state=DCEeFWf45A53sdfKef424&scope=r_basicprofile

and ran into problems. 1. The problem of cross-domain requests, as far as I understand, they are blocked by the browser, tell me how can I fix this? it seems like you need to specify some kind of headers.
2. The problem is the response from the server that comes to me if the request passed, I installed an extension for Chrome that allows cross-domain requests and I get this in response. And I can’t understand what to do, in theory a window should appear to allow access. Please explain what am I doing wrong?
LinkedIn app settings oauth , JavaScript
get request

$.ajax({
      type: 'GET',
      url: url,
      header: { 'Access-Control-Allow-Origin:': '*' },
      success: function (resp) {
        console.log('Data RESP: ', resp);


      },
      error: function (error) {
        console.log('ERROR RESP: ', error);
      }
    });

I am writing an application in Angular 5, but I use jQuery for sending, just for an example.