For details: https://stackoverflow.com/a/39920717/5989200

spoiler.md

動作例

Click to expand

let () =
  print_endline @@ string_of_int (1 + 1)
;;

Markdown ソース

<details><summary>Click to expand</summary><p>

```ocaml
let () =
  print_endline @@ string_of_int (1 + 1)
;;
```

</p></details>