An interceptor adds the token in Angular
Angular interview exercise on HttpClient, difficulty 3 of 3. Solve it in the editor beside a worked example, or cold in Interview mode with the example hidden; the tests run the moment you do.
TokenService holds a `token` signal ("" when signed out). Write authInterceptor: when a token is set, it adds the header Authorization: Bearer <token> to every request; without one the request goes out untouched. Export `appConfig` providing HttpClient with the interceptor. ProfileComponent loads GET /api/me ({ name }) into a `me` signal and shows the name in <p class="name">.
Each exercise pairs a worked example with a twin problem to solve in a real editor; the tests run the moment you do. Interview mode hides the example: solve it from memory, without the hint or the solution, and it counts as solved cold. Progress is saved in your browser, and in your account if you sign in.