⇦ Back to Janet API Survey

*doc-width* (keyword)

*doc-width* is bound to the keyword :doc-width—it can be used in place of :doc-width in a call to dyn, setdyn, or with-dyns and is preferable to using the keyword directly. When set to a number, it indicates the maximum width (in columns) of a row of text returned by doc-format.

• Official Docs
• JanetDocs

repl> (root-env '*doc-width*)
@{:doc "Width in columns to print documentation printed with `doc-format`."
  :dyn true
  :source-map ("boot.janet" 3236 1)
  :value :doc-width}

Things I Learned

• Like *doc-color*, *doc-width* is used to adjust the output of doc-format.
• When the :doc-width dynamic binding is not set, the default width is 80.
• By default, doc-format adds 4 space indentation and subtracts 8 from the value of :doc-width to calculate a max width.

Created: Wednesday October 22, 2025 @ 09:01:07 PM EDT