Course Content
Foundations of React Native
Foundations of React Native
Hooks
What about hooks in React Native?
In our previous discussion, we delved into the useState
hook, which functions similarly to its counterpart in React. This similarity arises because hooks are an integral part of the React library, and since React Native is built upon React, it naturally supports these hooks.
When developing with React Native, we can leverage hooks in much the same way as we do in React, using them for managing state, effects, context, and other aspects of components.
Let's review some React hooks:
useEffect
- Purpose:
useEffect
is used to perform side effects; - Usage: Fetching data from an API, subscribing to external events, updating document title, or any other side effects that need to occur after render;
- Syntax:
useContext
- Purpose:
useContext
allows functional components to consume context values that were created using thecreateContext
API; - Usage: Accessing global state or data across multiple components without prop drilling;
- Syntax:
useMemo
- Purpose:
useMemo
memoizes the result of a function call instead of the function itself; - Usage: Memoizing expensive computations or calculations to optimize performance;
- Syntax:
useRef
- Purpose:
useRef
creates a mutable ref object that persists for the entire lifetime of the component. It's useful for accessing DOM nodes or storing mutable values that won't trigger re-renders; - Usage: Accessing and modifying DOM elements, keeping track of previous values without triggering re-renders, or persisting values across renders;
- Syntax:
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