Enumerated types in JavaScript

enum.js

// create enumerated types in JavaScript
const EnumState;

(EnumState => { // ES6 IIFE!?  No-ice
    EnumState[EnumState["new"] = 1] = "new"
    EnumState[EnumState["active"] = 2] = "active"
    EnumState[EnumState["inactive"] = 3] = "inactive"
    EnumState[EnumState["done"] = 4] = "done"
    EnumState[EnumState["deleted"] = 5] = "deleted"
})( EnumState || ( EnumState = {} ) );

/*

    EnumState { 
        1: "new", 2: "active", 3: "inactive", 4: "done", 5: "deleted",
        new: 1, active: 2, inactive: 3, done: 4, deleted: 5
    }
    
*/