Describing an issue with Reason that not processing nested object properly via `jsConverter`

READEME.md

Claim: Difficulty with interop with JS when accepting nested object param from JS to Reason

Reasonml Ver: 3.3.2

• No problem with taking parameters from JS and matching to any type contains optional with one depth

• But it seems to lose values wrapped by option if you have more depth like below

type file = {
  name: option(string),
  content: option(string),
};

[@bs.deriving {jsConverter: newType}]
type configMap = {
  name: option(string),
  namespace: option(string),
  file: file
};

proof using Test.re

console log image from the proof:

Test.re

type file = {
  name: option(string),
  content: option(string),
};

type reConfigMap = {
  name: option(string),
  namespace: option(string),
  file: file
};

[@bs.deriving {jsConverter: newType}]
type jsConfigMap = {
  name: option(string),
  namespace: option(string),
  file: file
};

let rCM: reConfigMap = {
  name: Some("name"),
  namespace: Some("namespace"),
  file: {
    name: Some("filename"),
    content: Some("filecontent")
  }
};

let inspectOptStr = oStr => switch (oStr) {
| Some(s) => s
| None => "NOTHING!"
};

let inspectFile = ({name, content}) => {
  inspectOptStr(name) 
  ++ ", "
  ++ inspectOptStr(content)
};

let inspectCM = ({name, namespace, file}: reConfigMap) => {
  inspectOptStr(name) 
  ++ ", "
  ++ inspectOptStr(namespace)
  ++ ", "
  ++ inspectFile(file)
};

let inspectJSCM = ({name, namespace, file}: jsConfigMap) => {
  inspectOptStr(name) 
  ++ ", "
  ++ inspectOptStr(namespace)
  ++ ", "
  ++ inspectFile(file)
};

"reason type works well as below"->Js.log;
rCM->inspectCM->Js.log;

let inspectCMFromJS = absJSCM => {
  absJSCM->jsConfigMapFromJs->inspectJSCM;
};

""->Js.log;
"------------------------------"->Js.log;
""->Js.log;

[%raw {|
  (() => {
  const cm = {
    name: 'cm-name',
    namespace: 'cm-name',
   	file: {
      name: 'cm-filename',
      content: 'cm-filecontent'
    }
  };
  
  console.log("jsConfigMap can't handle nested file as below");
  console.log(inspectCMFromJS(cm));
  })()
|}];