Enums in Javascript with ES6

Question

I\'m rebuilding an old Java project in Javascript, and realized that there\'s no good way to do enums in JS.

The best I can come up with is:

const C         


        

Answer 1

Here is an Enum factory that avoids realm issues by using a namespace and Symbol.for:

const Enum = (n, ...v) => Object.freeze(v.reduce((o, v) => (o[v] = Symbol.for(`${n}.${v}`), o), {}));

const COLOR = Enum("ACME.Color", "Blue", "Red");
console.log(COLOR.Red.toString());
console.log(COLOR.Red === Symbol.for("ACME.Color.Red"));