/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 vote297 views1 answer
React import json
Javascript React
0 vote443 views1 answer
How to prevent clickjacking in react js
Javascript React
0 vote343 views2 answers
Reactjs date display
Javascript React
-1 vote328 views2 answers
Toggle on button click in react js functional component
Javascript React
1 vote310 views3 answers
Iframe in react
Javascript React
0 vote315 views1 answer
How to remove the top border from table react bootstrap
Javascript React
1 vote344 views2 answers
Push state array react
Javascript React
0 vote308 views1 answer
React json object pretty
Javascript React
0 vote309 views1 answer
What is react mounting
Javascript React
65 votes285 views6 answers
Route react
Javascript React