[css-display] display: grid doesn't establish a GFC for subgrids (original) (raw)

A mentioned in #2598 (comment), https://drafts.csswg.org/css-display-3/#valdef-display-grid says

grid
The element generates a principal grid container box, and establishes a grid formatting context.

However, subgrids don't establish a GFC. See https://www.w3.org/TR/css-grid-2/#grid-container

A grid container that is not a subgrid establishes an independent grid formatting context for its contents.