Events

Pass callbacks in the sheet config. Each receives the sheet id.

Event	Fires
onWillPresent(id)	Just before the sheet is added to the stack
onDidPresent(id)	When the platform has finished showing it
onWillDismiss(id)	When closing starts: dismiss(), auto-dismiss, back button, or a user swipe
onDidDismiss(id)	After it is gone, for any reason
onSnapChange(id, index)	It moved to another snap point, by drag or by code

sheet.present({
  id: 'filters',
  content: <Filters />,
  snapPoints: ['40%', '90%'],
  onWillPresent: id => analytics.track('sheet_open', {id}),
  onDidDismiss: id => applyFilters(),
  onSnapChange: (id, index) => setExpanded(index === 1),
});

Order

present()            → onWillPresent → (platform shows) → onDidPresent
snapTo()/drag        → onSnapChange
dismiss()/swipe      → onWillDismiss → (platform hides) → onDidDismiss

onDidDismiss always fires once per presentation, so it's the right place to clean up and to set visible back to false.

On NativeSheet

NativeSheet uses shorter names without the id:

NativeSheet prop	Equivalent
onPresent()	onDidPresent
onDismiss()	onDidDismiss
onSnapChange(index)	onSnapChange