Reporting up with output() in Angular
Angular interview exercise on Inputs & outputs, 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.
RatingComponent shows five <button class="star">, lit (class "on") up to the `value` input. Clicking a star emits its number (1 to 5) through a `rated` output. The parent owns the value: the component reports the click and changes nothing itself.
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.