bs-webapi - How to loop over Dom.nodeList?

Question

The following won't work since sides is a Dom.nodeList and DomTokenList.forEach expects a Dom.domTokenList.

open Bs_webapi.Dom;

external length : Dom.nodeList => int = "" [@@bs.get];

let sides = Document.querySelectorAll "#carousel > figure" document;

DomTokenList.forEach (fun item _ => print_endline item) (sides);

Answer 1

Paraphrased from the Reason Discord, courtesy of @anmonteiro:

Js.Array.forEach Js.log (NodeList.toArray sides);

Here is an example of how to setAttribute for each element in a NodeList. Note, Element.ofNode can be used to convert a Dom.node to option Dom.element.

open Bs_webapi.Dom;

external length : Dom.nodeList => int = "" [@@bs.get];

let sides = Document.querySelectorAll "#carousel > figure" document;

Js.Array.forEachi
  (fun side index =>
    switch (Element.ofNode side) {
    | Some element =>
      Element.setAttribute "style" "some style here" element
    | None => ()
    }
  )
  (NodeList.toArray sides)

https://bucklescript.github.io/bucklescript/api/Js_array.html#VALforEach