Zachary D. Rowitsch d768ae25da Implement box-sizing CSS property (content-box / border-box) ...

Add box-sizing support across the rendering pipeline so that
width/height can refer to either the content-box (default) or the
border-box (content + padding + border). This is one of the most
commonly used CSS properties and is required by virtually every
modern CSS reset.

The implementation adjusts width/height resolution in block, flex,
grid, and table layout engines, and defaults tables to border-box
in the UA stylesheet to match Chrome/Firefox/Safari behavior.

Five previously-failing WPT tests now pass and are promoted in the
manifest.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

2026-02-14 21:25:58 -05:00

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