/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

34 votes331 views3 answers
React-router
Javascript React
24 votes333 views5 answers
React map array
Javascript React
1 vote420 views1 answer
How to resize react icons
Javascript React
0 vote367 views1 answer
Key being passed as prop react
Javascript React
3 votes356 views1 answer
React icons in nextJS
Javascript React
0 vote363 views1 answer
React Redux reducer crud
Javascript React
2 votes337 views1 answer
React-native-reanimated npm
Javascript React
1 vote364 views5 answers
Push notification react native
Javascript React
0 vote332 views1 answer
Keyboard avoidance view not working on react native
Javascript React
0 vote361 views1 answer
React get current date minus 7 days
Javascript React