Template refs and onMounted in Vue
Vue interview exercise on Lifecycle & refs, difficulty 1 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 SearchBox with a prop `autofocus` (boolean, default false): an <input> and a <button>. When autofocus is true, focus the input as soon as the component is mounted (a template ref + onMounted). Clicking the button also focuses the input.
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.