Please note, this is a STATIC archive of website developer.mozilla.org from 03 Nov 2016, cach3.com does not collect or store any user information, there is no "phishing" involved.

Set.prototype.size

Our volunteers haven't translated this article into Català yet. Join us and help get the job done!

The size accessor property returns the number of elements in a Set object.

Description

The value of size is an integer representing how many entries the Set object has. A set accessor function for size is undefined; you cannot change this property.

Examples

Using size

var mySet = new Set();
mySet.add(1);
mySet.add(5);
mySet.add("some text")

mySet.size; // 3

Specifications

Specification Status Comment
ECMAScript 2015 (6th Edition, ECMA-262)
The definition of 'Set.prototype.size' in that specification.
Standard Initial definition.
ECMAScript 2017 Draft (ECMA-262)
The definition of 'Set.prototype.size' in that specification.
Draft  

Browser compatibility

Feature Chrome Firefox (Gecko) Internet Explorer Opera Safari
Basic support 38 19 (19) [1] 11 25 7.1
Feature Android Chrome for Android Firefox Mobile (Gecko) IE Mobile Opera Mobile Safari Mobile
Basic support No support 38 19.0 (19) No support No support 8

[1] From Gecko 13 (Firefox 13 / Thunderbird 13 / SeaMonkey 2.10) to Gecko 18 (Firefox 18 / Thunderbird 18 / SeaMonkey 2.15 / Firefox OS 1.0.1 / Firefox OS 1.1) the size property was implemented as a Set.prototype.size() method, this has been changed to a property in later versions conform to the ECMAScript 6 specification (bug 807001).

See also

Document Tags and Contributors

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