React.js - CSS Grid - Responsive

Your solution is fully functional, but I have a suggestion.

When doing an expression, inputting a number clears the one that was there on the screen, I need to be able to see 4 + 5 all at once, because that takes away the ability to do more than one symbol on a single expression; 4 + 5 - 3 * 2.

Happy Coding.

Hello,

nice work :). I see one problem - the theme switcher. In firefox I see that it is made with checkboxes, but I think that radiobuttons would be better. Checkboxes can be checked all together, but in a group of radiobuttons can turned on only one of them. In your app I could turn on all three options in one time. Happy coding!

Hello! Nice Work Fabio!

Here is my suggestion, if i do 2*0 = 0 and press any other number, then 0 doesn't dissapear like 02. butI think it's better to be 2, not 02.