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')
);
Are there any code examples left?
New code examples in category Javascript
-
Javascript 2023-04-21 22:52:36
-
Javascript 2022-03-27 22:25:20 javascript download string as file
-
Javascript 2022-03-27 21:40:22 sort numbers in array javascript
-
Javascript 2022-03-27 21:20:04 compare two arrays and return the difference javascript
-
Javascript 2022-03-27 21:15:02 javascript regex french phone number
-
Javascript 2022-03-27 21:05:03 cypress custom error message
-
Javascript 2022-03-27 21:00:05 create element javascript with id
-
Javascript 2022-03-27 20:40:57 feather icons react
-
Javascript 2022-03-27 20:20:01 how to make graphql request in axios
-
Javascript 2022-03-27 20:15:07 bootstrap validator password and confirm password