Incorrect Use of xs Breakpoint in Tailwind Variants Documentation

[negprof]

In the Tailwind Variants documentation, the example for responsive variants includes the xs breakpoint. However, xs is not a standard breakpoint in Tailwind CSS, as per the official Tailwind CSS documentation.

Observed Behavior
1. The Tailwind CSS transformer crashes when it encounters xs, as it is not a recognized breakpoint.
2. Classes corresponding to breakpoints other than initial (e.g., sm, md) are not included in the generated global.css.