30-seconds-of-code/snippets/DataList.md

title, tags

title	tags
DataList	components,beginner

Renders a list of elements from an array of primitives.

• Use the value of the isOrdered prop to conditionally render an <ol> or a <ul> list.
• Use Array.prototype.map() to render every item in data as a <li> element with an appropriate key.

const DataList = ({ isOrdered = false, data }) => {
  const list = data.map((val, i) => <li key={`${i}_${val}`}>{val}</li>);
  return isOrdered ? <ol>{list}</ol> : <ul>{list}</ul>;
};

const names = ['John', 'Paul', 'Mary'];
ReactDOM.render(<DataList data={names} />, document.getElementById('root'));
ReactDOM.render(
  <DataList data={names} isOrdered />,
  document.getElementById('root')
);