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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.

The keys() method of Set instances is an alias for the values() method.

Syntax

keys()

Parameters

None.

Return value

A new iterable iterator object.

Examples

Using keys()

The keys() method is exactly equivalent to the values() method.

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>

Browser compatibility

	Desktop					Mobile							Server
	Chrome	Edge	Firefox	Opera	Safari	Chrome Android	Firefox for Android	Opera Android	Safari on IOS	Samsung Internet	WebView Android	WebView on iOS	Bun	Deno	Node.js
`keys`	38	12	24	25	8	38	24	25	8	3.0	38	8	1.0.0	1.0	0.12.0