internal export const DEFAULT_CSS_CURSOR = 'default' ; internal export const TAU = 2 * Math . PI ; internal export const RIGHT_ANGLE = TAU / 4 ; internal export const GOLDEN_RATIO = 1.618 ; public export const TOP = 'top' as const ; public export const BOTTOM = 'bottom' as const ; public export const LEFT = 'left' as const ; public export const RIGHT = 'right' as const ; public export const MIDDLE = 'middle' as const ; public export const CENTER = 'center' as const ;