CSS View Transition Pseudo-elements Explained
Blink28624 Syys 2025

CSS View Transition Pseudo-elements Explained

These sources provide a detailed, technical explanation of the View Transition API implementation within the Chromium web browser, focusing on how CSS pseudo-elements enable smooth animations. The first source explains that view transition pseudos (like ::view-transition-old() and ::view-transition-new()) are temporary, browser-synthesized overlays used to capture and animate visual snapshots of elements during state changes. The second, more extensive source describes the low-level C++ classes in the Blink rendering engine and the cc compositor that orchestrate this process, including the DocumentTransition class, which manages the lifecycle, snapshot capture, and pseudo-element creation, and the SurfaceAnimationManager in the Viz component, which handles the final, performant GPU-accelerated animation of the saved frames using specialized layers and directives. Together, the texts map the high-level CSS API to the complex, multi-process architecture of Chromium, explaining how old and new content are matched, isolated on the top layer, and composited for animation.


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WebMCP: AI Functionality for the Browser

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React Fiber, Concurrency, and Reconciliation

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SOLID Principles in Chromium Blink Compositor

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cc::ScrollTree

cc::ScrollTree

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cc::EffectTree

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The source provides an extensive technical explanation of the Effect Property Tree within the Chromium compositor, which is crucial for managing how visual effects are applied to web content. This tre...

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cc::ClipTree

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The source provides an extensive technical overview of the ClipTree within Chromium's compositor property tree architecture, explaining its critical role in managing geometric clipping. The ClipTree i...

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cc::TransformTree

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source provides a highly detailed technical overview of the Transform Property Tree within the Chromium compositor, which is a core component of the RenderingNG architecture responsible for all coordi...

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cc::LayerImpl: Compositor Layer Deep Dive

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The sources provide an exhaustive technical explanation of the cc::LayerImpl class, which is the core representation of a visual element within Chromium's multi-threaded rendering pipeline. These laye...

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