Explain the difference between useMemo and useCallback?
Here’s a difference of useMemo
and useCallback int tabular form
:
useMemo | useCallback |
---|---|
Memoizes a value (result of a function) | Memoizes a function |
Memoized value | Memoized function reference |
When you need to memoize a calculated value | When you need to memoize a function |
Recalculates when any dependency changes | Recreates the function only when any dependency changes |
Example: Memoizing the result of expensive computations | Example: Memoizing event handler functions to prevent re-renders |
Top React Hooks Interview Questions & Answers
In this article, you will learn React Hooks interview questions and answers that are most frequently asked in interviews. Before proceeding to learn React Hooks interview questions and answers, first learn the complete React Hooks.
React hooks are functions that enable functional components to use state and lifecycle features that were previously only available in class components. Hooks provide functions like useState, useEffect, useContext, etc., that allow you to “hook into” React features from functional components.
Contact Us