<component :is> and KeepAlive in Vue
Vue interview exercise on Slots & dynamic components, 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.
Write Wizard around the given StepName and StepEmail components (each keeps what was typed in its own ref): render the current step with <component :is>, a <button class="back"> and a <button class="next"> moving between them, and keep each step's typed text when the user goes back and forth (KeepAlive).
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.