OptionalbeforeRuns before the step shows and may bring the target into being (open a sidebar); awaited.
OptionalidDefaults to the step's one-based position.
OptionalplacementA selector, or a function resolving the element; the tour waits for it to appear.
One stop of a guided tour.
targetmust be a control, not a container: the card is placed beside it and a viewport-sized target pushes the card off-screen.