/Javascript/React/React usestate functional update

React usestate functional update

() => setCount(prevCount => prevCount - 1)

Source: reactjs.org

Update state in useState hook

// declare state using useState hook.
// someState is set to someInitialState
const [someState, setSomeState] = useState(someInitialState);

// setSomeState updates the current state 
setSomeState(someOtherState);

Source: reactjs.org

Similar codes

0 vote324 views1 answer
How to trigger on Blur only when clicked outside parent component and not child component in react js
Javascript React
15 votes295 views2 answers
React check if url address is valid
Javascript React
0 vote310 views1 answer
Why doesn't'$' work in react
Javascript React
6 votes303 views1 answer
'useHistory' is not exported from 'react-router-dom'.
Javascript React
0 vote320 views1 answer
Jason rpc reactjs
Javascript React
0 vote328 views1 answer
React native use route undefined
Javascript React
0 vote301 views2 answers
React social login button
Javascript React
1 vote308 views1 answer
Image source not working react
Javascript React
1 vote315 views1 answer
Conditional style react native
Javascript React
0 vote308 views1 answer
Using redux on react extension
Javascript React