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.
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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 |