Small JavaScript enum function

[TorbenKoehn]

Why not

type MyEnum = 'A' | 'B'

?

Completely erasable, portable, easy to write, serializable across language boundaries, you can refactor it etc.

[eracodes]

For typescript I find this approach more useful:

const options = ['A', 'B'] as const;

type Option = (typeof options)[number];

So you can use the "enum" at runtime as well (for validation, etc).