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flackr / scroll-timeline

A polyfill of ScrollTimeline.
Apache License 2.0
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Prevent ViewTimeline from being initialized as ScrollTimeline first #246

Open johannesodland opened 7 months ago

johannesodland commented 7 months ago

ViewTimeline inherits from ScrollTimeline and invokes the ScrollTimeline constructor first during initialization. As a result, the timeline is initialized with document.scrollingElement as the source first, including measuring the source, setting up a scroll listener, ResizeObserver and MutationObserver.

This PR splits initialization of ScrollTimeline and ViewTimeline, preventing source from being initialized multiple times.