The source provides a comprehensive overview of content fragmentation within the Blink rendering engine, focusing heavily on the transition from the legacy engine to the modern LayoutNG architecture. Fragmentation is defined as the process of breaking continuous content flow into multiple segments, such as columns in multi-column layouts or pages in print media, utilizing fragmentainers as boundaries. The text explains that the older system handled fragmentation poorly as an afterthought, leading to rendering errors, while LayoutNG integrates fragmentation into the core layout process using structures like the fragment tree and break tokens to ensure CSS standard compliance (including break-* properties, orphans, and widows) across all layout types (Block, Flex, and Grid). This shift greatly improved the correctness and visual integrity of complex layouts and printing in Chrome.
