The size
accessor property returns the number of (unique) elements in a Set
object.
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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 |
---|
ECMAScript (ECMA-262) The definition of 'Set.prototype.size' in that specification. |
Browser compatibility
The compatibility table on this page is generated from structured data. If you'd like to contribute to the data, please check out https://github.com/mdn/browser-compat-data and send us a pull request.
Desktop | Mobile | Server | |||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|
size | Chrome Full support 38 | Edge Full support 12 | Firefox
Full support
19
| IE Full support 11 | Opera Full support 25 | Safari Full support 8 | WebView Android Full support 38 | Chrome Android Full support 38 | Firefox Android
Full support
19
| Opera Android Full support 25 | Safari iOS Full support 8 | Samsung Internet Android Full support 3.0 | nodejs Full support 0.12 |
Legend
- Full support
- Full support
- See implementation notes.
- See implementation notes.