Javascript create "Dicitonary-like"-Object out of a list of pathes

I have a List with multiple pathes like this:

[
"posts/index/cms.md",
"posts/index/test/sidegenerator.md"
"posts/ssg/gatsby.md"
"posts/ssg/hugo.md"
"posts/ssg/generator/rt/gen.txt"
"example/test.md"
]

i want to create a nested dictionary-like structure out of the list, something like this:

{
    "posts": {
        "index": {
            "cms.md": null,
            "test": {
                "sidegenerator.md": null
            }
        },
        "ssg": {
            "gatsby.md": null,
            "hugo.md": null,
            "generator: {
                "rt": {
                    "gen.txt": null
                }
            }
        },
        "example": {
            "test.md": null
        }
    }

}

I came from python and i know something like a dictionary doesnt exist in javascript. Its just an Object, functioning like a dictionary (key:value).

Currently i have these functions:

function create_dict_outof_list(index, rest_of_list){
  if (index == rest_of_list.length-1){
    return rest_of_list[index]
  }else {
    let new_dict = {}
    new_dict[rest_of_list[index]] = create_dict_outof_list(index+1, rest_of_list)
    return new_dict
  }
  
}

function recursive_dict_generator(data_dict, index, list){

  console.log("Dict: ", list[index] in data_dict)
  if (index < list.length-1){
    if (list[index] in data_dict){
      return data_dict[list[index]] = recursive_dict_generator(data_dict[list[index]], index+1, list)

    } else {
      return data_dict[list[index]] = create_dict_outof_list(0, list.slice(index))
    }
  } else {
    if (list[index] in data_dict){

      return data_dict

    } else {
      return list[index]
    }
  }

}

My main where i tested my functions:

function main(){

  let data_dict = {}
  let new_dict = {}
  new_dict = recursive_dict_generator(data_dict, 0, ["posts","index", "test", "sidegenerator.md"])
  console.log("test 1: ", data_dict)
  console.log("test 1.5", new_dict)
  
  recursive_dict_generator(data_dict, 0, ["posts","ssg", "generator", "rt", "test.md"])
  console.log("test 2: ", data_dict)

}

Console log:
test 1:  { posts: { posts: { index: [Object] } } }
test 1.5 { posts: { index: { test: 'sidegenerator.md' } } }
test 2:  { posts: { ssg: { generator: [Object] } } }

I dont know how to handle object-references in Javascript. In this case its not adding a new Key to the existing Dictionary.

>Solution :

First, we just split each path to the sections and then, using recursion, we would fill a dictionary to represent the data:

const paths = [
  "posts/index/cms.md",
  "posts/index/test/sidegenerator.md",
  "posts/ssg/gatsby.md",
  "posts/ssg/hugo.md",
  "posts/ssg/generator/rt/gen.txt",
  "example/test.md"
];

const dictionary = {};

const process = (path, dic) => {
  if (path.length === 0)
    return;
  const key = path.shift();
  if (path.length === 0)
    return dic[key] = null;
  dic[key] ??= {};
  return process(path, dic[key]);
};

paths.forEach(path => process(path.split("/"), dictionary));
console.log(dictionary);