bs-webapi -如何在Dom.nodeList上循环？

Question

下面的代码不起作用，因为sides是一个Dom.nodeList，而DomTokenList.forEach需要一个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

出自@anmonteiro@anmonteiro的原因不一致：

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

下面是如何为NodeList中的每个元素执行setAttribute的示例。注意，Element.ofNode可用于将Dom.node转换为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