/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

65 votes338 views6 answers
Route react
Javascript React
0 vote393 views1 answer
Install aos in react
Javascript React
1 vote361 views2 answers
React capitalize first letter
Javascript React
0 vote383 views1 answer
React native create text file
Javascript React
-2 votes422 views3 answers
Keyboard dismiss in react native
Javascript React
0 vote377 views1 answer
React native custom debounce input
Javascript React
1 vote402 views1 answer
React native object is empty
Javascript React
18 votes359 views3 answers
How to hide header in react navigation
Javascript React
11 votes407 views4 answers
Prototype react
Javascript React
1 vote419 views2 answers
React PropTypes.instanceOf
Javascript React