Blink's View Transitions: Nesting and Compositing Mechanics
Blink28622 Nov 2025

Blink's View Transitions: Nesting and Compositing Mechanics

The sources provide a technical overview and implementation details of the View Transition API within the Blink rendering engine, focusing on achieving smooth animated state changes in web pages. The explanation details the conceptual workflow where the API captures "old" and "new" DOM states as snapshots, executes the required DOM update, and then uses a nested hierarchy of pseudo-elements (like ::view-transition-old and ::view-transition-new) to run GPU-accelerated animations. Crucially, the text examines nested view transitions, which use the view-transition-group CSS property to ensure that parent-child visual relationships, such as clipping and 3D transforms, are correctly preserved in the composite transition layer. Finally, the source covers performance optimizations achieved through offloading animation to the compositor and robustness measures for handling edge cases like transition interruption or dynamic content updates.



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