Returns a callback that stops the form with formId prompting about unsaved
changes when the host navigates away. Call it after the host action that
discarded or persisted those edits has completed, immediately before
navigating. Safe to call without a provider or for a form that is not
rendered: nothing happens.
Parameters
formId: number
The id of the form whose unsaved changes prompt to stop.
Returns a callback that stops the form with
formIdprompting about unsaved changes when the host navigates away. Call it after the host action that discarded or persisted those edits has completed, immediately before navigating. Safe to call without a provider or for a form that is not rendered: nothing happens.