Retry, then fall back in Angular
Angular interview exercise on HttpClient, difficulty 2 of 3. Solve it in the editor beside a worked example; the tests run the moment you do.
WeatherComponent loads GET /api/weather ({ temp: number }) into a `weather` signal: retry once on failure, and if the retry fails too show <p class="error">Weather unavailable</p> and stop. On success render "<temp> °C" in <p class="temp">.
Each exercise pairs a worked example with a twin problem to solve in a real editor; the tests run the moment you do. Progress is saved in your browser, and in your account if you sign in.