Set.prototype.entries()

const set = new Set();
set.add(42);
set.add("forty two");
const iterator = set.entries();
for (const entry of iterator) {
  console.log(entry);
  // Expected output: Array [42, 42]
  // Expected output: Array ["forty two", "forty two"]
}

entries()

const mySet = new Set();
mySet.add("foobar");
mySet.add(1);
mySet.add("baz");
const setIter = mySet.entries();
console.log(setIter.next().value); // ["foobar", "foobar"]
console.log(setIter.next().value); // [1, 1]
console.log(setIter.next().value); // ["baz", "baz"]