REST countries api with theme switcher using react and scss module

What did you find difficult while building the project?

• I had problems when I tried to render the filtered result. The initial state of my filtered state is an empty array before it is been populated with data items based on the user's search or filtered term which caused errors when i tried to map the array, after going through some online posts i figured out that an array can only be mapped if true so i used the short circuit && operator to map out the items if my array is true.

• I also had a little problem when working with the api v3 but it all turned out fine.

Which areas of your code are you unsure of ?

• I'm not particularly sure of how I handled the routing.

Do you have any questions about best practices?

• Of all the questions I need to ask, i feel app optimization, propTypes and testing tops the list. for optimization, i noticed some of my components rerenders when they don't need to.

FeedBack

Reviewers should please drop criticisms if need be, particularly on the search and filter feature