Implementing a Cross-Page Playback Queue with Document Picture-in-Picture
The article explains how Bilibili leveraged Chrome’s Document Picture‑in‑Picture API to create a cross‑page playback queue displayed in a small always‑on‑top window, detailing style synchronization, independent lifecycle handling via a helper class, and real‑time updates using BroadcastChannel‑plus‑iframe messaging while relying solely on native web features.