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li key attribute

Encouraging NeoBliz answered on September 8, 2021 Popularity 5/10 Helpfulness 6/10

answer li key attribute

li key attribute

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//A “key” is a special string attribute you need 
//to include when creating lists of elements.

function NumberList(props) {
  const numbers = props.numbers;
  const listItems = numbers.map((number) =>
    <li key={number.toString()}>      {number}
    </li>
  );
  return (
    <ul>{listItems}</ul>
  );
}

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

Popularity 5/10 Helpfulness 6/10 Language javascript

Source: reactjs.org

Tags: javascript key

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Contributed on Sep 08 2021

Encouraging NeoBliz

0 Answers Avg Quality 2/10

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