/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 vote194 views1 answer
Plotly react
Javascript React
1 vote151 views1 answer
Table reactstrap
Javascript React
0 vote277 views1 answer
How to align placeholder in react native
Javascript React
0 vote195 views2 answers
React toastify dark mode
Javascript React
0 vote146 views1 answer
Left side menu react js
Javascript React
4 votes205 views2 answers
Hide status bar react native
Javascript React
-1 vote191 views1 answer
How to insert divider in react native
Javascript React
0 vote191 views1 answer
React bootstrap col not working
Javascript React
0 vote186 views1 answer
React hooks link to external site new tab
Javascript React
0 vote179 views1 answer
Yarn react select
Javascript React