This is Quarto extension that enables divs to be output as a custom environment in LaTeX. This is useful when you'd like to share content between LaTeX and other formats, but need the content to be placed in an environment when emitting LaTeX.

To install this extension in your current directory (or into the Quarto project that you're currently working in), use the following command:

quarto install extension quarto-ext/latex-environment

Divs with a class name listed in the in the environments key will be emitted in LaTeX as an environment with the provided name (or the class name itself if no name is provided). All of the following are valid:

environments: center

environments: [center]

environments:
  center: center-env

---
title: LaTeX Environment
format:
   pdf: default
   html: default
filters:
   - latex-environment
environments: [center]
---

::: {.center}
The contents of this div will be output in a `center`
LaTeX environment, but will appear in HTML (and any other output 
format as a simple div with the class `center`)
:::

Spans with a class name listed in the in the commands key will be emitted in LaTeX as a command with the provided name (or the class name itself if no name is provided). All of the following are valid:

commands: ce

command: [ce]

commands:
  ce: ce-command

---
title: LaTeX Command
format:
   pdf:
     include-in-header: 
       text: |
         \usepackage{mhchem}
   html: default
filters:
   - latex-environment
commands: [ce]
---

This will replace spans of class `ce` with the `\ce{}` command for LaTeX output, 
but leave the spans intact for HTML output. So `[H2SO4]{.ce}` becomes [H2SO4]{.ce}.