44 lines
996 B
Markdown
44 lines
996 B
Markdown
---
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title: Uncontrolled textarea element
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tags: components,input
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expertise: beginner
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cover: blog_images/volcano-sunset.jpg
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firstSeen: 2018-12-10T10:45:51+02:00
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lastUpdated: 2020-11-25T20:46:35+02:00
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---
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Renders an uncontrolled `<textarea>` element that uses a callback function to pass its value to the parent component.
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- Use the `defaultValue` passed down from the parent as the uncontrolled input field's initial value.
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- Use the `onChange` event to fire the `onValueChange` callback and send the new value to the parent.
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```jsx
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const TextArea = ({
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cols = 20,
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rows = 2,
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defaultValue,
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onValueChange,
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...rest
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}) => {
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return (
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<textarea
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cols={cols}
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rows={rows}
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defaultValue={defaultValue}
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onChange={({ target: { value } }) => onValueChange(value)}
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{...rest}
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/>
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);
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};
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```
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```jsx
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ReactDOM.render(
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<TextArea
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placeholder="Insert some text here..."
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onValueChange={val => console.log(val)}
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/>,
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document.getElementById('root')
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);
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```
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