/Javascript/React/React component key prop

React component key prop

function ListItem(props) {
  // Correct! There is no need to specify the key here:  return <li>{props.value}</li>;}

function NumberList(props) {
  const numbers = props.numbers;
  const listItems = numbers.map((number) =>
    // Correct! Key should be specified inside the array.    <ListItem key={number.toString()} value={number} />  );
  return (
    <ul>
      {listItems}
    </ul>
  );
}

const numbers = [1, 2, 3, 4, 5];
ReactDOM.render(
  <NumberList numbers={numbers} />,
  document.getElementById('root')
);

Source: reactjs.org

Similar codes

0 vote401 views2 answers
.env file example react native
Javascript React
3 votes368 views1 answer
White screen issue in react native splashscreen
Javascript React
0 vote389 views1 answer
Making a react js website project ready for hosting
Javascript React
17 votes412 views4 answers
React native geolocation
Javascript React
1 vote323 views1 answer
React native linking phone call
Javascript React
0 vote364 views1 answer
Dropdown list value react fragment
Javascript React
0 vote330 views1 answer
Option component in react js errors
Javascript React
0 vote391 views1 answer
React native regenerate android and ios folders
Javascript React
1 vote387 views1 answer
Typing refs react
Javascript React
0 vote370 views3 answers
Flatlist react native keyextractor
Javascript React