Set() constructor
The Set
lets you create Set
objects that store unique values of any type, whether primitive values or object references.
Syntax
new Set() new Set(iterable)
Parameters
-
iterable
Optional -
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 newSet
is 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
Browser compatibility
Desktop | Mobile | |||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
Chrome | Edge | Firefox | Internet Explorer | Opera | Safari | WebView Android | Chrome Android | Firefox for Android | Opera Android | Safari on IOS | Samsung Internet | |
Set |
38 |
12 |
13 |
11 |
25 |
8 |
38 |
38 |
14 |
25 |
8 |
3.0 |
iterable_allowed |
38 |
12 |
13 |
No |
25 |
9 |
38 |
38 |
14 |
25 |
9 |
3.0 |
new_required |
38 |
12 |
42 |
11 |
25 |
9 |
38 |
38 |
42 |
25 |
9 |
3.0 |
null_allowed |
38 |
12 |
37 |
11 |
25 |
9 |
38 |
38 |
37 |
25 |
9 |
3.0 |
See also
© 2005–2021 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