How to convert Set to Array?

if no such option exists, then maybe there is a nice idiomatic
one-liner for doing that ? like, using for...of, or similar ?

Indeed, there are several ways to convert a Set to an Array:

• Using Array.from:

Note: safer for TypeScript.

const array = Array.from(mySet);

• Simply spreading the Set out in an array:

Note: Spreading a Set has issues when compiled with TypeScript (See issue #8856). It’s safer to use Array.from above instead.

const array = [...mySet];

• The old-fashioned way, iterating and pushing to a new array (Sets do have forEach):

const array = [];
mySet.forEach(v => array.push(v));

• Previously, using the non-standard, and now deprecated array comprehension syntax:

const array = [v for (v of mySet)];