Скачать или смотреть 7 Blink View Transition Discovery and UA Stylesheet Generation

This document details how the Blink rendering engine manages the technical lifecycle of View Transitions by coordinating DOM updates with visual animations. Once a developer triggers a transition, the engine enters a discovery phase where it forces style and layout recalculations to precisely map the geometry of new elements. To facilitate the visual shift, a specialized StyleBuilder assembles a temporary User-Agent stylesheet that defines the default cross-fade animations and positions for pseudo-element overlays. The StyleEngine integrates these rules into the rendering pipeline, ensuring that transition-specific elements are correctly styled and synchronized even during complex state transfers. Furthermore, the system includes internal mechanisms to handle cross-document transitions by serializing state data, allowing for consistent testing and execution across different navigation types. Ultimately, these internal hooks automate the heavy lifting of snapshotting and animation, providing a seamless experience that developers can further customize with their own CSS.