What is the purpose of the second argument in useState?
The purpose of the second argument in useState
is to initialize the state value. When you call useState(initialValue)
, the initialValue
provided as the second argument is used to initialize the state variable.
const [count, setCount] = useState(0);
In this '
0
'
is the initial value provided as the second argument to useState
, so count
will be initialized with ‘0
'
as its initial value.
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.