This is how useCallback works.

In the callback defined on line 🙄, the function body increases the count by 1. We set the dependency list to be shallChange. This way, the count will not increase unless shallChange gets a different value.

If you click Count+ multiple times, the count will only increase once. It will increase again after you click Shall Change? butotn.

Here are a few things I noticed in week 7.

I was creating a React app using create-react-app and ran into this error:

After googling around I saw a workaround by installing v5 locally.

Yet a better workaround is: ⋯