Code Review

Hey @Alejandro-Bernal-M, you did a great job but there are some things that can be improved:

I kindly recommend you use CSS classes to change that background property and then you can just use Element.Classlist.add('classname') this way your code will be more readable and easy to understand https://github.com/Alejandro-Bernal-M/To-do-list/blob/4949196ca7d08dcce1d2a1c2f571ef6cf2741cbc/src/index.js#L29-L30 https://github.com/Alejandro-Bernal-M/To-do-list/blob/4949196ca7d08dcce1d2a1c2f571ef6cf2741cbc/src/index.js#L42-L43
Good job with your index.js file, but I think it would be better if you put some comments on it, that way your code will be more readable and easier to understand
I kindly recommend you implement outline: none in your inputs for it to improve the UX
I notice that you have a parenthesis that doesn't do anything, please remove it

Alejandro-Bernal-M / To-do-list