Type Aliases in

About Type Aliases

Type aliases

A type alias can be used in Gleam to give a convenient name for an existing type that would be otherwise cumbersome to write.

pub type Headers =
  List(#(String, String))

pub fn html_headers() -> Headers {
  [
    #("content-type", "text/html"),
    #("x-frame-options", "DENY"),
  ]
}

When written with pub type the alias can be used outside of the module it is defined in. If pub is omitted then the alias is private and cannot be referenced in other modules.