During November 2024, Jean-Christophe Boilard extended the ocsigen/js_of_ocaml repository by adding support for the HTML details element and its toggle event, enabling OCaml applications to interact programmatically with these native browser components. He introduced new types for detailsElement and toggleEvent, aligning OCaml’s DOM manipulation capabilities with modern HTML5 standards. This enhancement allows developers to build more accessible and interactive web interfaces directly in OCaml, laying groundwork for richer UI components in downstream projects. The work demonstrated a focused application of OCaml and web development skills, with depth in browser-UI interoperability and careful integration into the existing codebase.