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(391)

Blink's Rendering Engine: A Forest of Trees

Blink's Rendering Engine: A Forest of Trees

The provided source details the intricate rendering pipeline of Google Chrome's Blink engine, explaining how web content transforms from HTML/CSS into on-screen pixels. It outlines a sequence of speci...

6 Sep 202540min

Blink's StyleEngine: Chromium CSS Deep Dive

Blink's StyleEngine: Chromium CSS Deep Dive

The provided document details Blink's StyleEngine, a crucial component within Chromium's rendering engine responsible for managing all CSS styles for a web document. It orchestrates style data and ope...

5 Sep 202555min

Deep Dive: The CSS Flexbox Layout Model

Deep Dive: The CSS Flexbox Layout Model

This source offers a comprehensive technical lecture on the CSS Flexbox Layout Model, beginning with an overview of traditional CSS layout methods like block, inline, table, positioned, and float layo...

5 Sep 20251h 2min

Fixing Chrome Bug 40786326: A Developer Walkthrough

Fixing Chrome Bug 40786326: A Developer Walkthrough

This resource provides a thorough guide to resolving Chrome Bug 40786326, which involves an inside marker trailing margin overshoot. The explanation will begin with the process of test creation, detai...

5 Sep 202541min

Flexible Grid Systems: CSS Grid and Beyond

Flexible Grid Systems: CSS Grid and Beyond

This source provides an extensive overview of CSS Grid Layout, a powerful two-dimensional system for web design. It details Grid's specifications and capabilities, explaining how tracks are sized, ite...

5 Sep 202551min

Blink's LayoutNG: Fragment Tree Generation Deep Dive

Blink's LayoutNG: Fragment Tree Generation Deep Dive

This lecture outline provides an in-depth overview of LayoutNG's fragment tree generation within Blink, Google Chrome's rendering engine. It highlights the transition from the legacy layout system, wh...

5 Sep 20251h 2min

Blink's Layer Tree: Architecture, Rendering, and Performance

Blink's Layer Tree: Architecture, Rendering, and Performance

The provided text offers an in-depth look into Blink's layer tree, a crucial component in Chromium's rendering engine responsible for transforming web pages into pixels. It explains the architecture o...

5 Sep 20251h 2min

Blink's Rendering: Fragment Tree to Layer Tree Conversion

Blink's Rendering: Fragment Tree to Layer Tree Conversion

The provided text details Blink's rendering pipeline, specifically focusing on the conversion of the Fragment Tree to the Layer Tree within Chromium's RenderingNG architecture. It explains how layout ...

5 Sep 202528min

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