see :[reacting-to-input-with-state](https://react.dev/learn/reacting-to-input-with-state) **Challenge 1 of 3: Add and remove a CSS class** https://github.com/reactjs/react.dev/assets/73568310/ef77e6e4-572f-4af1-8e45-1f95b4598930 Chrome: 120.0.6099.109 (x86_64) macOS: 14.0 (23A344)