janpaepke/ScrollMagic v3.0.0-beta.2 on GitHub

destroy() calls onDestroy instead of onRemove on plugins — onRemove now only fires via removePlugin(). Plugins that used onRemove for destroy cleanup should add onDestroy (or assign the same function to both).
computedOptions removed — replaced by resolvedBounds, which returns { element: ElementBounds, scrollParent: ContainerBounds } (cached layout bounds only, no longer leaks the full internal options structure).
Getter return types narrowed — element, scrollParent, and vertical getters now return resolved types (Element, Window | Element, boolean) instead of the raw public input union. Setters still accept the full public types.

Plugin lifecycle hooks: onEnable, onDisable, onDestroy — plugins can react to enable/disable transitions and distinguish manual removal from instance teardown. destroy() on an enabled instance fires onDisable → onDestroy in sequence.
scrollmagic/util subpath export — exposes agnosticValues and agnosticProps via import { ... } from 'scrollmagic/util' for plugin authors working with direction-agnostic bounds.
ElementBounds, ContainerBounds, ResolvedBounds types exported — available from the main entry point for plugin and integration authors.

See the new PLUGINS.md for the full plugin authoring guide, including lifecycle hook sequencing and utility usage.

npm install scrollmagic@next

See the README for full documentation.