JavaScript has objects, arrays, dates, and sets. In regard to immutables, with the advent of records and tuples, objects now map to records, arrays to tuples, dates to temporals (soon enough), but sets have no counterpart.

Any designs on implementing immutable sets as a follow-on proposal? When creating structured data to represent app state sets are handy and map to many real world (domain sensible) scenarios.

Having them as loosely built from tuples but with uniqueness enforcement would make dealing with such scenarios much friendlier (e.g. not having to regularly check a tuple before adding a value).

const tuple = #[1, 2, 2, 3];
const set = #![1, 2, 2, 3]; // => #![1, 2, 3]
const apples = #[1, 2], oranges = #[2, 3];
const fruit = #![...apples, ...oranges]; // => #![1, 2, 3]