The entries() method of Set instances returns a new set iterator object that contains [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.
Set.prototype.entries()
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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
Browser compatibility
| Desktop | Mobile | Server | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Chrome | Edge | Firefox | Opera | Safari | Chrome Android | Firefox for Android | Opera Android | Safari on IOS | Samsung Internet | WebView Android | Deno | Node.js | ||
entries |
38 | 12 | 24 | 25 | 8 | 38 | 24 | 25 | 8 | 3.0 | 38 | 1.0 | 0.12.0 | |
See also
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https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Set/entries