Function useValueOrOnDemand

useValueOrOnDemand(
input?: ValueOrOnDemand,
onError?: (err: any) => string,
): readonly [string, boolean]
Returns the value and a loading indicator
Parameters
- input: ValueOrOnDemand = ''
  the text or function to retrieve the text
- OptionalonError: (err: any) => string
  a callback that will be called when the input could not be retrieved. It should return a fallback value that will be used instead.
Returns readonly [string, boolean]