/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 vote213 views1 answer
React native panresponder on click
Javascript React
-1 vote246 views4 answers
React cheat sheets
Javascript React
1 vote238 views1 answer
React repeat
Javascript React
4 votes216 views2 answers
How to take 100% width in react native
Javascript React
0 vote182 views4 answers
React node sequilize
Javascript React
11 votes199 views3 answers
React native text ellipsis
Javascript React
1 vote195 views2 answers
React how to sleep 1 second
Javascript React
1 vote201 views2 answers
How to get window size in react js
Javascript React
0 vote216 views1 answer
React unfocus check
Javascript React
2 votes264 views2 answers
React native settimeout
Javascript React