How to call a JS method called "val"

#1

Hi, just starting out with ReasonML. I’m trying to model a JS class (from the Firebase API) as follows:

type dataSnapshot('k, 'v) = {
  .
  "key": 'k,
  [@bs.meth] "val": unit => Js.Nullable.t('v),
  [@bs.meth] "exists": unit => bool,
  [@bs.meth] "numChildren": unit => int,
};

open ReasonMaybe;

let snapValMaybe = (snapshot: option(dataSnapshot('k, 'v))) =>
  Maybe.from(snapshot)
  |> Maybe.chain(snap => Maybe.from(Js.Nullable.toOption(snap##val())));

But snap##val() is a syntax error, presumably because val is a reserved word. I can’t use [@bs.as] for some reason – perhaps because I am already using the quoted object keys syntax?

Any help or insight would be hugely appreciated. Thanks!

#2

Have you tried snap##_val? From my experience, if a certain parameter name is invalid or reserved in Reason, prepending an underscore allows it to compile.

#3

Thanks for this, and sorry for the delay in replying. I’ve actually rewritten the model to use [@bs.send], which I think is a more idiomatic ReasonML approach.