Set.prototype.keys()
Baseline Widely available
This feature is well established and works across many devices and browser versions. It’s been available across browsers since July 2015.
Syntax
js
keys()
Parameters
None.
Return value
A new iterable iterator object.
Examples
Using keys()
The keys() method is exactly equivalent to the values() method.
js
const mySet = new Set();
mySet.add("foo");
mySet.add("bar");
mySet.add("baz");
const setIter = mySet.keys();
console.log(setIter.next().value); // "foo"
console.log(setIter.next().value); // "bar"
console.log(setIter.next().value); // "baz"
Specifications
| Specification |
|---|
| ECMAScript® 2026 Language Specification # sec-set.prototype.keys |