PopperPlacement
PopperPlacement =
"auto"|"auto-start"|"auto-end"|"top"|"top-start"|"top-end"|"bottom"|"bottom-start"|"bottom-end"|"right"|"right-start"|"right-end"|"left"|"left-start"|"left-end"
Defined in: step.ts:301
Where a step sits relative to its target. Other values, such as 'below' or
'bottom-left', are invalid. -start and -end align the step to an edge.