Set.prototype.entries()
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 entries()
method of Set
instances returns a new set iterator object that contains an array of [value, value]
for each element in this set, in insertion order. For Set
objects there is no key
like in Map
objects. However, to keep the API similar to the Map
object, each entry has the same value for its key and value here, so that an array [value, value]
is returned.
Try it
const set1 = new Set();
set1.add(42);
set1.add("forty two");
const iterator1 = set1.entries();
for (const entry of iterator1) {
console.log(entry);
// Expected output: Array [42, 42]
// Expected output: Array ["forty two", "forty two"]
}
Syntax
js
entries()
Parameters
None.
Return value
A new iterable iterator object.
Examples
Using entries()
js
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"]
Specifications
Specification |
---|
ECMAScript® 2025 Language Specification # sec-set.prototype.entries |
Browser compatibility
Report problems with this compatibility data on GitHubdesktop | mobile | server | ||||||||||||
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entries |
Legend
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- Full support
- Full support
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