useFieldObserver Hook

Most applications need to listen to changes in other fields in order to conditionally display / set other fields. Starting from v3.8.2, you can use the useFieldObserver hook to achieve just that.

The useFieldObserver hook must be consumed inside a <Form/> provider, as it uses its context.

Example Usage

import { useFieldObserver } from 'frmx'
export function MyComponent(props) {  const { field } = props  const optionalHandler = (newVal) => alert(newVal)  const latestValue = useFieldObserver(field, optionalHandler)
  return <>    <div>The latest value from {field} is {latestValue}</div>  </>}

Return Value

The useFieldObserver hook only returns the field value as of today (we plan to start including the error state in a future version) and accepts one optional handler function as a second argument which will be executed with the observed field latest value if provided at all.