JavaScript Enum

enum.mjs

export class Enum
{
  static Item = class
  {
    #name;
    #enumeration;

    constructor(name, enumeration)
    {
      this.#name = name;
      this.#enumeration = enumeration;
    }

    get name() { return this.#name; }
    get enumeration() { return this.#enumeration; }

    toString() { return this.name; }
  }
  
  #name;

  constructor (name, item_names)
  {
    this.#name = `${name}`;
    for (const item_name of item_names)
    {
      const item = new Enum.Item(`${item_name}`, this);
      Object.defineProperty(this, item.name,
                            { value: item,
                              enumerable: true,
                              writable: false });
    }
  }

  get name() { return this.#name; }
  get items() { return Object.values(this); }
  
  toString() { return `${this.name}(${Object.keys(this).join(',')})`; }
}