EPISODE · Feb 5, 2026 · 32 MIN
Chromium View Transitions: A Complete Implementation Deep-Dive
from Blink286 · host Free Debreuil
This technical documentation explains how Chromium implements View Transitions by coordinating four distinct architectural layers: Blink, the cc compositor, the Viz service, and CSS animations. It details the lifecycle of a transition, beginning with the JavaScript API and progressing through a seven-phase state machine that manages DOM snapshots. The system utilizes a specialized pseudo-element tree to render visual changes while bridging the gap between the main thread and the compositor via ViewTransitionRequest objects. Furthermore, the text explores how cross-document navigations are handled through state serialization and the browser process. Ultimately, the architecture relies on SharedElementResourceIDs to synchronize live and cached textures, ensuring smooth visual continuity during page updates.
What this episode covers
This technical documentation explains how Chromium implements View Transitions by coordinating four distinct architectural layers: Blink, the cc compositor, the Viz service, and CSS animations. It details the lifecycle of a transition, beginning with the JavaScript API and progressing through a seven-phase state machine that manages DOM snapshots. The system utilizes a specialized pseudo-element tree to render visual changes while bridging the gap between the main thread and the compositor via ViewTransitionRequest objects. Furthermore, the text explores how cross-document navigations are handled through state serialization and the browser process. Ultimately, the architecture relies on SharedElementResourceIDs to synchronize live and cached textures, ensuring smooth visual continuity during page updates.
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Chromium View Transitions: A Complete Implementation Deep-Dive
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