/Javascript/React/React Hooks append state

React Hooks append state

Usestate array push

setTheArray([...theArray, newElement]);

Source: stackoverflow.com

React Hooks append state

setTheArray(currentArray => [...currentArray, newElement])

Functional component how to add to existing array react

const {useState, useCallback} = React;
function Example() {
    const [theArray, setTheArray] = useState([]);
    const addEntryClick = () => {
        setTheArray([...theArray, `Entry ${theArray.length}`]);
    };
    return [
        <input type="button" onClick={addEntryClick} value="Add" />,
        <div>{theArray.map(entry =>
          <div>{entry}</div>
        )}
        </div>
    ];
}

ReactDOM.render(
    <Example />,
    document.getElementById("root")
);

Source: stackoverflow.com

Similar codes

0 vote163 views1 answer
React native typescript nodejs timeout
Javascript React
0 vote253 views1 answer
Provider not found react
Javascript React
0 vote156 views2 answers
React js form radio input using hooks
Javascript React
1 vote174 views4 answers
React router go rprevious page
Javascript React
4 votes162 views6 answers
React-native shadow generator
Javascript React
1 vote156 views3 answers
React mid senior dev interview questuions
Javascript React
0 vote175 views1 answer
Reactive forms change event in angular
Javascript React
0 vote179 views1 answer
How to add oncklick button react
Javascript React
2 votes163 views1 answer
How to do a classname variable and string react
Javascript React
0 vote168 views1 answer
React native anination 2 valuse
Javascript React