Chromium is accepting "100" as "100px" for track sizing.
That's wrong, "100" is not a track breath:
https://drafts.csswg.org/css-grid/#typedef-track-breadth

The same happens in "minmax(50, 100)", which is wrong too.
 

Chromium is accepting "100" as "100px" for track sizing on quirks mode.
That's wrong, "100" is not a track breath:
https://drafts.csswg.org/css-grid/#typedef-track-breadth

The same happens in "minmax(50, 100)", which is wrong too.

See example at: https://wptest.center/#/gt8d00