28 lines
802 B
Markdown
28 lines
802 B
Markdown
---
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title: DataList
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tags: components,beginner
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firstSeen: 2018-11-29T12:12:24+02:00
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lastUpdated: 2020-11-03T21:26:34+02:00
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---
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Renders a list of elements from an array of primitives.
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- Use the value of the `isOrdered` prop to conditionally render an `<ol>` or a `<ul>` list.
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- Use `Array.prototype.map()` to render every item in `data` as a `<li>` element with an appropriate `key`.
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```jsx
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const DataList = ({ isOrdered = false, data }) => {
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const list = data.map((val, i) => <li key={`${i}_${val}`}>{val}</li>);
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return isOrdered ? <ol>{list}</ol> : <ul>{list}</ul>;
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};
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```
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```jsx
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const names = ['John', 'Paul', 'Mary'];
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ReactDOM.render(<DataList data={names} />, document.getElementById('root'));
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ReactDOM.render(
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<DataList data={names} isOrdered />,
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document.getElementById('root')
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);
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```
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