src/content/chapter5_advance_features/lesson04_externals/code.gleam


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import gleam/io

// A type with no Gleam constructors
pub type DateTime

// An external function that creates an instance of the type
@external(javascript, "./my_package_ffi.mjs", "now")
pub fn now() -> DateTime

// The `now` function in `./my_package_ffi.mjs` looks like this:
// external function now() {
//   return new Date();
// }

pub fn main() {
  io.debug(now())
}