Map() constructor
The Map()
creates Map
objects.
Syntax
new Map() new Map(iterable)
Parameters
-
iterable
Optional -
An
Array
or other iterable object whose elements are key-value pairs. (For example, arrays with two elements, such as[[ 1, 'one' ],[ 2, 'two' ]]
.) Each key-value pair is added to the newMap
.
Examples
Creating a new Map
let myMap = new Map([ [1, 'one'], [2, 'two'], [3, 'three'], ])
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 | |
Map |
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/Map/Map