enum.js

module.exports = (...args) =>
  args.reduce((instance, arg) => ({
    ...instance,
    [arg]: Symbol(arg)
  }), {})

test.js

const { expect } = require('chai')
const Enum = require('enum')

const DIRECTION = Enum('NORTH', 'SOUTH', 'WEST', 'EAST')
const DIR = Enum('NORTH', 'SOUTH', 'WEST', 'EAST')

describe('Enum()', () => {
  it('should diff between different enum instances', () => {
    expect(DIRECTION.NORTH).to.equal(DIRECTION.NORTH)
    expect(DIRECTION.NORTH).to.not.equal(DIR.NORTH)
  })

  it('should be able to convert to string', () => {
    expect(DIRECTION.NORTH.toString()).to.equal('Symbol(NORTH)')
  })
})