The size
accessor property of Set
instances returns the number of (unique) elements in this set.
The size
accessor property of Set
instances returns the number of (unique) elements in this set.
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.
const mySet = new Set(); mySet.add(1); mySet.add(5); mySet.add("some text"); console.log(mySet.size); // 3
Desktop | Mobile | Server | ||||||||||||
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Chrome | Edge | Firefox | Opera | Safari | Chrome Android | Firefox for Android | Opera Android | Safari on IOS | Samsung Internet | WebView Android | Deno | Node.js | ||
size |
38 | 12 | 19From Firefox 13 to Firefox 18, thesize property was implemented as a Set.prototype.size() method, this has been changed to a property in later versions conform to the ECMAScript 2015 specification. |
25 | 8 | 38 | 19From Firefox 13 to Firefox 18, thesize property was implemented as a Set.prototype.size() method, this has been changed to a property in later versions conform to the ECMAScript 2015 specification. |
25 | 8 | 3.0 | 38 | 1.0 | 0.12.0 |
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https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Set/size