/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

38 votes382 views2 answers
How to write a comment in react js
Javascript React
4 votes383 views3 answers
Width 100% react-native
Javascript React
113 votes366 views4 answers
New create react app
Javascript React
0 vote362 views1 answer
How to pass parent function to child screen in React Navigation
Javascript React
2 votes358 views2 answers
React not recognizing lorem
Javascript React
0 vote380 views1 answer
Custom login with facebook button react native
Javascript React
1 vote319 views1 answer
Mui modal backdrop
Javascript React
5 votes319 views3 answers
React routes multiple compoenents
Javascript React
17 votes370 views4 answers
Appdata roaming npm react-native.ps1 cannot be loaded
Javascript React
2 votes441 views2 answers
Export aab react native
Javascript React