PositioningFunction

typedef

Parameters

elementRect : Rect: The rect of the element to be positioned.
targetRect : Rect: The rect of the target the element (its rect) is relatively positioned to.
viewportRect : Rect: The rect of the visual browser viewport.
[ limiterRect ] : Rect

Returns

DomPositioningFunctionResult | null: When the function returns null, it will not be considered by getOptimalPosition.