lvjr
Background colour and vlines are non-existent for negative rowsep
I understand that having a negative rowsep makes the row height smaller than anticipated and the output is expected. I want a way to show the background colour and the vlines for rows that are tightest in row height. Having rowsep=0pt is not the tightest.
\documentclass{article}
\usepackage{xcolor}
\usepackage{tabularray}
\begin{document}
\begin{tblr}{rowsep=0pt, vlines, hlines, row{odd}={azure9}, row{even}={gray8}}
Alpha & Beta & Gamma & Delta \\
Epsilon & Zeta & Eta & Theta \\
Iota & Kappa & Lambda & Mu \\
\end{tblr}
\par\vspace{2em}
\begin{tblr}{rowsep=-10pt, vlines, hlines, row{odd}={azure9}, row{even}={gray8}}
Alpha & Beta & Gamma & Delta \\
Epsilon & Zeta & Eta & Theta \\
Iota & Kappa & Lambda & Mu \\
\end{tblr}
\end{document}
I want a way to show the background colour and the vlines for rows that are tightest in row height.
rowsep=0pt, stretch=0
\documentclass{article}
\usepackage{xcolor}
\usepackage{tabularray}
\begin{document}
\begin{tblr}{rowsep=0pt, vlines, hlines, row{odd}={azure9}, row{even}={gray8}}
Alpha & Beta & Gamma & Delta \\
Epsilon & Zeta & Eta & Theta \\
Iota & Kappa & Lambda & Mu \\
\end{tblr}
\par\vspace{2em}
\begin{tblr}{rowsep=0pt, stretch=0, vlines, hlines, row{odd}={azure9}, row{even}={gray8}}
Alpha & Beta & Gamma & Delta \\
Epsilon & Zeta & Eta & Theta \\
Iota & Kappa & Lambda & Mu \\
\end{tblr}
\end{document}
About negative rowsep, I'm guessing it's caused by a negative depth and/or lower part of a row obtained by some internal calculation step.
\documentclass{article}
\usepackage{xcolor}
\usepackage{tabularray}
\begin{document}
\def\testRowsep#1{%
\leavevmode\llap{\small\texttt{\detokenize{#1}}}
\begin{tblr}{vlines, hlines, row{odd}={azure9}, row{even}={gray8}, baseline=T, #1}
Alpha & Beta & Gamma & Delta \\
Epsilon & Zeta & Eta & Theta \\
Iota & Kappa & Lambda & Mu \\
\end{tblr}
\par\medskip
}
\testRowsep{rowsep= 0pt}
\testRowsep{rowsep=-3pt}
\testRowsep{rowsep=-5pt}
\testRowsep{rowsep=-10pt}
\end{document}
The interaction of negative rowsep and background color seems problematic, so let's keep this issue open until this is resolved.