Questions and answers

The following are some questions and answers to refresh your knowledge:

1. What is a React context?

   A React context is an identity that can be used to share a value with consumers. It's designed so that a value can be provided to a localized scope, hence all components within that scope can read from this shared value.

2. What is the useContext hook?

   The useContext hook is used in a consumer component so that it can read a context given by providers. A component can consume as many contexts as it can. When the provider gets updated, all the consumer components for that particular context get updated at the same time.

3. What's the common usage of useContext?

   The useContext hook is a hook in the React hook family when it comes to an update involving an area of components. We often see this context usage in User, Theme, and Table, which requires the consumption of a value under an ancestor component without passing it explicitly through layers of...