Bugfix 19: optional slider for direct zoom-level control. When
provided, a vertical range input shows below the buttons; current
level shows as the thumb position. min/max bound the slider
(defaults: 0.1x to 4x). The component is uncontrolled past initial
sync: caller must update zoomLevel after cy.zoom changes (e.g.
pinch-zoom, wheel-zoom).
Bugfix 19: optional slider for direct zoom-level control. When provided, a vertical range input shows below the buttons; current level shows as the thumb position.
min/maxbound the slider (defaults: 0.1x to 4x). The component is uncontrolled past initial sync: caller must update zoomLevel after cy.zoom changes (e.g. pinch-zoom, wheel-zoom).