Note card with conditional check IF

Great submission! Your JS seems to be working well, and the form is well centered as well as responsive.

I'd suggest avoid using alert('Please, select a note.'), as there as many issues with that. One of them being: "alert(...) as well as confirm(...) and prompt(...) can be useful for debugging during development, but in production mode this kind of pop-up could expose sensitive information to attackers, and should never be displayed." (source: https://rules.sonarsource.com/javascript/RSPEC-1442 )

alert() also block the code execution and it is not something u might want. Instead try to disable the button until something is selected, or simply add an error message and display that below/above the button.

Hope you find this feedback helpful!