/Javascript/React/Functional component how to add to existing array react

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 vote229 views1 answer
React bootsrap color picker
Javascript React
1 vote220 views2 answers
How to render react native app under the status bar
Javascript React
0 vote283 views1 answer
Invariant Violation: [React Intl] An `id` must be provided to format a message.
Javascript React
-1 vote237 views1 answer
Convert datetime value to time only in reactjs
Javascript React
2 votes223 views1 answer
Npm install --save react-native-vector-icon
Javascript React
0 vote228 views1 answer
My env.local file not working in my react app usind mac
Javascript React
14 votes221 views2 answers
Adding border in react native
Javascript React
0 vote280 views1 answer
Show modal by using id in list react
Javascript React
4 votes231 views4 answers
Width 100% react native
Javascript React
0 vote216 views1 answer
Why can't i move my react bootstrapmodal over to the left
Javascript React