The Set lets you create Set objects that store unique values of any type, whether primitive values or object references.
Set() constructor
Try it
Syntax
new Set() new Set(iterable)
Parameters
-
iterableOptional -
If an iterable object is passed, all of its elements will be added to the new
Set.If you don't specify this parameter, or its value is
null, the newSetis empty.
Return value
A new Set object.
Examples
Using the Set object
let mySet = new Set() mySet.add(1) // Set [ 1 ] mySet.add(5) // Set [ 1, 5 ] mySet.add(5) // Set [ 1, 5 ] mySet.add('some text') // Set [ 1, 5, 'some text' ] let o = {a: 1, b: 2} mySet.add(o)
Specifications
| Specification |
|---|
| ECMAScript Language Specification # sec-set-constructor |
Browser compatibility
| Desktop | Mobile | Server | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Chrome | Edge | Firefox | Internet Explorer | Opera | Safari | WebView Android | Chrome Android | Firefox for Android | Opera Android | Safari on IOS | Samsung Internet | Deno | Node.js | |
Set |
38
|
12
|
13
|
11
|
25
|
8
|
38
|
38
|
14
|
25
|
8
|
3.0
|
1.0
|
0.12.0
0.10.0
|
iterable_allowed |
38
|
12
|
13
|
No
|
25
|
9
|
38
|
38
|
14
|
25
|
9
|
3.0
|
1.0
|
0.12.0
|
new_required |
38
|
12
|
42
|
11
|
25
|
9
|
38
|
38
|
42
|
25
|
9
|
3.0
|
1.0
|
0.12.0
|
null_allowed |
38
|
12
|
37
|
11
|
25
|
9
|
38
|
38
|
37
|
25
|
9
|
3.0
|
1.0
|
0.12.0
0.10.0
|
See also
© 2005–2022 MDN contributors.
Licensed under the Creative Commons Attribution-ShareAlike License v2.5 or later.
https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Set/Set
