Chrome's CSS Scroll Snap Implementation: Blink and Compositor Deep Dive
Blink28629 Loka 2025

Chrome's CSS Scroll Snap Implementation: Blink and Compositor Deep Dive

The source provides an extensive technical explanation of the implementation of CSS Scroll Snap within the Google Chrome browser, specifically detailing how the feature is managed across the Blink rendering engine and the Chromium Compositor (CC). It begins by outlining the historical evolution of scroll snapping from early coordinate-based specifications to the modern element-based model, which uses properties like scroll-snap-type and scroll-snap-align. The text then describes the division of labor: Blink handles the interpretation of CSS and calculates precise snap coordinates (SnapContainerData), while the Compositor thread utilizes this data along with various SnapSelectionStrategy objects to manage smooth scroll animations, handle user input, and ensure correct snapping behavior (including managing the 50% proximity threshold and scroll-snap-stop priority). Finally, the document discusses future developments for the feature, such as the introduction of scroll snap events and potential fine-grained control for developers.


Jaksot(395)

CSS Sticky Positioning and Paint Property Trees

CSS Sticky Positioning and Paint Property Trees

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[General] Inside Blink: The Paint Property Tree Builder Pipeline

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The PaintPropertyTreeBuilder is a critical component within Google Chrome’s Blink engine that converts layout data into structural property trees used for rendering. Operating during the PrePaint phas...

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Inside Blink: The Paint Property Tree Builder Pipeline

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Promisify Scroll: Promise-Based Web Scrolling API

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CSS Containing Blocks and Blink Engine Implementation

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This text examines how CSS containing blocks function and how the Blink rendering engine implements these rules within Chromium. It explains that a containing block is the essential rectangular refere...

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Axis-Split Sticky Constraints in Chromium Layout and Compositing

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Chromium is refining its rendering engine to support axis-split sticky constraints, allowing elements to stick to different scroll containers for horizontal and vertical movements. Previously, a singl...

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Blink Paint Property Trees: Construction and Lifecycle Phases

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The provided text explains the construction and lifecycle of paint property trees within the Blink rendering engine. These structures, which include Transform, Clip, Effect, and Scroll trees, replace ...

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