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

title, tags, expertise, firstSeen, lastUpdated

title	tags	expertise	firstSeen	lastUpdated
Uncontrolled input field	components,input	intermediate	2019-08-21T12:28:50+03:00	2020-11-03T21:08:39+02:00

Renders an uncontrolled <input> element that uses a callback function to inform its parent about value updates.

• Use the defaultValue passed down from the parent as the uncontrolled input field's initial value.
• Use the onChange event to fire the onValueChange callback and send the new value to the parent.

const UncontrolledInput = ({ defaultValue, onValueChange, ...rest }) => {
  return (
    <input
      defaultValue={defaultValue}
      onChange={({ target: { value } }) => onValueChange(value)}
      {...rest}
    />
  );
};

ReactDOM.render(
  <UncontrolledInput
    type="text"
    placeholder="Insert some text here..."
    onValueChange={console.log}
  />,
  document.getElementById('root')
);