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.
Syntax
mySet.entries()Return value
A new Iterator object that contains an array of [value, value] for each element in the given Set, in insertion order.
Examples
Using entries()
var mySet = new Set();
mySet.add('foobar');
mySet.add(1);
mySet.add('baz');
var 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 | Status | Comment | 
|---|---|---|
| ECMAScript 2015 (6th Edition, ECMA-262) The definition of 'Set.prototype.entries' in that specification. | Standard | Initial definition. | 
| ECMAScript Latest Draft (ECMA-262) The definition of 'Set.prototype.entries' in that specification. | Living Standard | 
Browser compatibility
| Feature | Chrome | Edge | Firefox (Gecko) | Internet Explorer | Opera | Safari | 
|---|---|---|---|---|---|---|
| Basic support | 38 | (Yes) | 24 (24) | No support | 25 | 7.1 | 
| Feature | Android | Chrome for Android | Edge | Firefox Mobile (Gecko) | IE Mobile | Opera Mobile | Safari Mobile | 
|---|---|---|---|---|---|---|---|
| Basic support | No support | 38 | (Yes) | 24.0 (24) | No support | No support | 8 |