A Typst port of Elsevier’s CAS LaTeX classes, cas-sc.cls (single column) and cas-dc.cls (double column), version 2.4. It is not affiliated with or endorsed by Elsevier. It reproduces the page geometry, front matter, first-page notes, running heads and body styles of the LaTeX output. The design takes cues from elsearticle, the Typst port of elsarticle.cls.

Usage

#import "@preview/elsevier-cas-unofficial:0.1.0": *

#show: article.with(
  layout: "dc", // "dc" = cas-dc (double column), "sc" = cas-sc (single column)
  title: [Title of the article],
  short-title: [Running head],
  authors: (
    (name: "Ada Lovelace", affiliations: 1, corresponding: true, email: "ada@example.org"),
    (name: "Charles Babbage", affiliations: (1, 2), orcid: "0000-0002-0000-0000"),
  ),
  affiliations: (
    "1": (organization: [Analytical Engine Laboratory], city: [London], country: [UK]),
    "2": [University of Cambridge, Cambridge, UK],
  ),
  abstract: [...],
  keywords: ([engines], [computation]),
)

= Introduction
...
#bibliography("refs.bib")

typst init @preview/elsevier-cas-unofficial starts a new project from template/main.typ, a short skeleton with placeholders and comments. examples/sample.typ is a port of Elsevier’s cas-dc-sample.tex that uses every feature. Change layout: "dc" to "sc" in either file to get the single-column version.

Until the package is on Typst Universe, install it locally. Clone this repository to ~/.local/share/typst/packages/local/elsevier-cas-unofficial/0.1.0 on Linux, or ~/Library/Application Support/typst/packages/local/elsevier-cas-unofficial/0.1.0 on macOS, then import @local/elsevier-cas-unofficial:0.1.0.

Options of article

Authors

Each author is a dictionary. Only name is required.

Affiliations

An affiliation is either plain content or a dictionary like the keys of \affiliation. The entries are printed in the given order, each followed by a comma. The exceptions are country and the last entry, which get no separator. Add <key>sep to change the separator after an entry:

"2": (organization: [World Scientific University], addressline: [Street 29],
      postcode: [1011 NX], postcodesep: none, city: [Amsterdam], country: [The Netherlands]),

Other functions

The environments defined by new-theorem and new-definition take an optional title:

#let theorem = new-theorem("theorem", [Theorem])
#theorem(title: [Fermat])[No three positive integers satisfy ...] <thm:fermat>

Figures and tables

Figures and tables are captioned in a small sans-serif font: “Figure 1: …” below the figure, and “Table 1” on its own line above the table. Figures stay where they are written, as usual in Typst. Use placement: auto to let a figure float, and add scope: "parent" for a figure or table spanning both columns (figure*, table*):

#figure(image("wide.png"), caption: [...], placement: top, scope: "parent")

Tables have no strokes, and rows are spaced as in LaTeX. Draw booktabs rules with toprule, midrule and bottomrule; like booktabs, they leave some space above and below them:

#figure(caption: [...], table(columns: 3, toprule, [A], [B], [C], midrule, [1], [2], [3], bottomrule))

A table caption spans the column. To make it narrower, put the table in a block with a width, the equivalent of \begin{table}[width=.9\linewidth] with a tabular* of \tblwidth:

#figure(caption: [...], block(width: 90%, table(columns: (1fr, 1fr), [...], [...])))

Bibliography

The default style is elsevier-harvard (author–year), the scheme of cas-model2-names.bst. For numbered references, pass #bibliography("refs.bib", style: "elsevier-with-titles").

Fonts

The LaTeX classes use STIX Two for text and math, Computer Modern Sans for the running head, footer and captions, and Inconsolata for code. The template looks for “STIX Two Text”, “STIX Two Math” and “New Computer Modern Sans”. If they are missing, it falls back to New Computer Modern, Helvetica or Arial, and DejaVu Sans Mono. Typst prints a warning for each font family it cannot find. To pick other fonts:

#show: article.with(
  fonts: (sans: "Latin Modern Sans", mono: "Inconsolata"),
  // ...other options
)

Differences from the LaTeX classes

• Author groups (augroup, collaboration) and affiliations printed as footnotes (\address[..][foot=true]) are not ported.
• Biography text runs beside the photo; it does not wrap below it.
• First-page notes always sit at the bottom of the first page or column.
• A structured affiliation gets no comma after its last entry. LaTeX prints one unless that entry is country.
• Monospace text (code, URLs, email addresses and ORCIDs) is set at 0.8em, the size Typst gives raw text. LaTeX sets it at the text size.
• In the double-column layout, a front matter too tall for the first page is an error unless long-title: true is set. LaTeX lets it run off the page.

License

The package is released under three licenses, depending on the file:

• The code in src/ is under the MIT license.
• The starter project in template/, which typst init copies into new projects, is under MIT-0, so you can use and redistribute the files it creates without attribution.
• The icons in assets/, and the sample article in examples/ (text, figures and bibliography), come from or are adapted from Elsevier’s CAS LaTeX bundle, distributed under the LaTeX Project Public License 1.3c. The examples/ folder is not part of the downloaded package.