A parent and its child in Angular
Angular interview exercise on Inputs & outputs, 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.
Write TaskItemComponent (a required `task` input; a checkbox reflecting `task.done` whose change emits the task's id through `toggled`; the title in a <span>) and finish TaskListComponent, which renders one item per task, flips `done` on the task a child reports, and shows "1 of 3 done" in <p class="summary">.
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.