Destructuring without losing reactivity in Vue
Vue interview exercise on Patterns, 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.
useSettings() keeps { dark, fontSize } in a reactive object with toggleDark() and grow(). It returns a spread copy, so `const { dark } = useSettings()` is a dead boolean. Make it return refs for dark and fontSize (toRefs) so destructuring works, and keep the two functions. Writing fontSize.value must change the state the functions use.
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.