/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

1 vote111 views1 answer
View onpress react native
Javascript React
0 vote138 views2 answers
React materialize cdn
Javascript React
0 vote151 views2 answers
Barcode scanner react js
Javascript React
0 vote101 views1 answer
Rendering an array in react
Javascript React
0 vote106 views1 answer
How to use algolia react native
Javascript React
-1 vote152 views1 answer
How to insert divider in react native
Javascript React
0 vote154 views1 answer
Get rid of header bar react native
Javascript React
-2 votes139 views2 answers
Import link react
Javascript React
0 vote138 views1 answer
React-native eject not working
Javascript React
0 vote152 views1 answer
Ng2 validations angular using reactiveforms
Javascript React