/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 vote143 views1 answer
Reactive forms change event in angular
Javascript React
1 vote121 views1 answer
React why onclick property function trigger without click
Javascript React
0 vote123 views1 answer
React Calender Style
Javascript React
0 vote131 views1 answer
Hooks developed by react native
Javascript React
1 vote129 views1 answer
React native image disable fade in onload
Javascript React
1 vote124 views3 answers
Autocomplete react
Javascript React
0 vote147 views2 answers
Npm react router 6.0.0-alpha.2
Javascript React
1 vote130 views1 answer
Minimum flatlist size react native
Javascript React
0 vote92 views4 answers
React node sequilize
Javascript React
0 vote111 views1 answer
Export app react native
Javascript React