CSS View Transition Pseudo-elements Explained
Blink28624 Sep 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.


Episoder(403)

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The provided documents outline the essential functions of the RenderProcessHost (RPH), a crucial component within Chromium's multi-process architecture that resides in the browser process to manage a ...

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The technical documentation provides an extensive overview of two crucial browser-side components in Chromium's multi-process architecture: the RenderViewHost (RVH) and the RenderWidgetHost(RWH). The ...

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The source documentation provides a detailed analysis of the RenderFrameHost (RFH) and its implementing class, RenderFrameHostImpl, which constitute the essential browser-side representation of every ...

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