This is an amazing development, you have done an excellent job in a very short time. I am totally impressed. There are some recommendations that maybe can make this work of art even better:
It could be great to have some code that maybe helps older browsers to run your website. It is a little complex subject but maybe in the future you can check some tools that can help you with that (such as babel) (this is not mandatory for now)
All data flow in your page is working great, but it could be even better if you restrict the inputs by validating they are not empty when the user clicks the "Add" button. A simple HTML validation can do the trick.
This is an amazing development, you have done an excellent job in a very short time. I am totally impressed. There are some recommendations that maybe can make this work of art even better:
It could be great to have some code that maybe helps older browsers to run your website. It is a little complex subject but maybe in the future you can check some tools that can help you with that (such as babel) (this is not mandatory for now)
All data flow in your page is working great, but it could be even better if you restrict the inputs by validating they are not empty when the user clicks the "Add" button. A simple HTML validation can do the trick.