Map.map
The Map() creates Map objects.
Syntax
new Map([iterable])
Parameters
iterable- 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 new Map.
Examples
Creating a new Map
let myMap = new Map([
[1, 'one'],
[2, 'two'],
[3, 'three'],
])
Specifications
|
Desktop |
|
Chrome |
Edge |
Firefox |
Internet Explorer |
Opera |
Safari |
Map() constructor |
38 |
12 |
13 |
11 |
25 |
8 |
new Map(iterable) |
38 |
12 |
13 |
No |
25 |
9 |
Map() without new throws |
38 |
12 |
42 |
11 |
25 |
9 |
new Map(null) |
38 |
12 |
37 |
11 |
25 |
9 |
|
Mobile |
|
Android webview |
Chrome for Android |
Firefox for Android |
Opera for Android |
Safari on iOS |
Samsung Internet |
Map() constructor |
38 |
38 |
14 |
25 |
8 |
3.0 |
new Map(iterable) |
38 |
38 |
14 |
25 |
9 |
3.0 |
Map() without new throws |
38 |
38 |
42 |
25 |
9 |
3.0 |
new Map(null) |
38 |
38 |
37 |
25 |
9 |
3.0 |
|
Server |
|
Node.js |
Map() constructor |
0.12
- 0.12
- 0.10
Disabled
- Disabled From version 0.10: this feature is behind the
--harmony runtime flag.
|
new Map(iterable) |
0.12 |
Map() without new throws |
0.12 |
new Map(null) |
0.12
- 0.12
- 0.10
Disabled
- Disabled From version 0.10: this feature is behind the
--harmony runtime flag.
|
See also