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Miguel Ángel
0c6f438ae7
Three root-cause fixes for the lazy media preloading feature: 1. Untimed media orphaned at preload="metadata": the else branch in bindMediaMetadataListeners demoted ALL media elements, but the mediaPreloader only manages timed clips (data-start). Untimed media (background audio, ambient loops) got stuck at metadata forever. Now only timed elements are demoted. 2. Monotonic promotion with no eviction: once promoted, clips stayed at preload="auto" forever. Scrubbing through the full timeline promoted everything, bringing back the OOM crash. Added LRU eviction with MAX_PROMOTED=5 — when clips leave the preload window, their src is cleared and load() called to release buffered data per MDN. On re-entry, the original src is restored. 3. Metadata preload without load(): setting preload="metadata" alone doesn't guarantee the metadata fetch in Chrome Lite mode or Firefox with media.preload.default=0. Now load() is called after demotion to ensure el.duration is populated for timeline computation. Also adds exact-boundary tests for LAZY_THRESHOLD=6 and eviction coverage (evict on scrub, src restoration, MAX_PROMOTED cap, load() called on eviction).