useContext()

useContext is a hook in the React Context API that allows you to consume the context value in a functional component. It works by taking a context object as an argument and returning the current context value for that context.

Here's an example of how you might use useContext to consume the context value in a functional component:

In this example, the ThemeTogglerButton functional component is able to consume the theme and toggleTheme values from the ThemeContext without having to pass them down as props. It does this by using the useContext hook and passing the ThemeContext object as an argument. The hook returns the current context value for the ThemeContext, which can then be destructured and used within the component.

One advantage of using useContext is that it allows you to avoid the nesting and rendering overhead of the Consumer component. This can make your code simpler and more performant, especially if you have a deeply nested component tree that needs to access the context value.