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This is a new technology, part of the ECMAScript 2015 (ES6) standard .
This technology's specification has been finalized, but check the compatibility table for usage and implementation status in various browsers.

The entries() method returns a new Iterator object that contains an array of [value, value] for each element in the Set object, 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.




Using entries()

var mySet = new Set();

var setIter = mySet.entries();

console.log(; // ["foobar", "foobar"]
console.log(; // [1, 1]
console.log(; // ["baz", "baz"]


Specification Status Comment
ECMAScript 2015 (6th Edition, ECMA-262)
The definition of 'Set.prototype.entries' in that specification.
Standard Initial definition.

Browser compatibility

Feature Chrome Firefox (Gecko) Internet Explorer Opera Safari
Basic support 38 24 (24) Not supported 25 7.1
Feature Android Chrome for Android Firefox Mobile (Gecko) IE Mobile Opera Mobile Safari Mobile
Basic support Not supported 38 24.0 (24) Not supported Not supported 8

See also

Document Tags and Contributors

Contributors to this page: fscholz, arai, realityking
Last updated by: fscholz,