tikz-cd `shorten` in combination with `squiggly`

Question

I want to draw a shortened squiggly arrow, like the following:

However, when I use shorten in combination with squiggly, I get a strange effect, where the shortened segment is drawn both as squiggly and as a straight line (rather than not drawn at all):

The code is:

\documentclass{article}
\usepackage{tikz-cd}
\usetikzlibrary{decorations.pathmorphing}

\begin{document}
\begin{tikzcd}
    \bullet && \bullet
    \arrow[shorten <=10pt, shorten >=10pt, squiggly, from=1-1, to=1-3]
\end{tikzcd}
\end{document}

Is there a way to work around this issue?

Answer 1

You'll need to shorten the decoration itself in addition to the path. Found an old reference to this in http://pgf-and-tikz.10981.n7.nabble.com/shorten-and-decoration-td2248.html, and seems it still applies. Hence, you need to say squiggly={pre length=10pt, post length=10pt} in addition to the shortens.

\documentclass[border-5mm]{standalone}
\usepackage{tikz-cd}
\usetikzlibrary{decorations.pathmorphing}

\begin{document}
\begin{tikzcd}
    \bullet && \bullet
    \arrow[shorten <=10pt, shorten >=10pt,
            squiggly={
               pre length=10pt, post length=10pt
             },
             from=1-1, to=1-3]
\end{tikzcd}
\end{document}

Answer 2

Another possibility could be replace the shortens by start anchor and end anchor

\documentclass{article}
\usepackage{tikz-cd}
\usetikzlibrary{decorations.pathmorphing}

\begin{document}
\begin{tikzcd}
    \bullet && \bullet
    \arrow[squiggly, start anchor={[xshift=10pt]}, end anchor={[xshift=-10pt]}, from=1-1, to=1-3]
\end{tikzcd}
\end{document}