A service that posts in Angular
Angular interview exercise on HttpClient, difficulty 2 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.
TodoApi.create(title) POSTs { title } to /api/todos and resolves with the created todo ({ id, title }). NewTodoComponent has an <input> and a <button class="save">: clicking calls the service, and once the answer arrives the todo appears in <ul> as <li>#id title</li> and the input is cleared.
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.