JsEnums.js

// Function to create the enums
const getEnum = (obj) => {
    const EEnum = {}

    if (Array.isArray(obj)) {
        obj.forEach((enumerator, i) => EEnum[enumerator] = i)
    } else {
        Object.getOwnPropertyNames(obj)
            .forEach(property => {
                EEnum[property] = obj[property]
            })
    }

    // Prevent file modification after creation of the enum
    Object.freeze(EEnum)
    return EEnum
}

// Get enums
const EStatus = getEnum(['Inactive', 'Active'])
const EDataType = getEnum({ Foo: 1000, Bar: 2000, Fizz: 3000, Buzz: 4000 })

// See values
console.log(EStatus)
console.log(EDataType)

// Try to alter the enum props
EStatus.Foo = 200
EDataType.Bin = 5000

// They are not altered because the object has been frozen
console.log(EStatus)
console.log(EDataType)