The set()
method adds or updates an element with a specified key and a value to a Map
object.
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Syntax
myMap.set(key, value);
Parameters
key
- The key of the element to add to the
Map
object. value
- The value of the element to add to the
Map
object.
Return value
The Map
object.
Examples
Using set()
var myMap = new Map(); // Add new elements to the map myMap.set('bar', 'foo'); myMap.set(1, 'foobar'); // Update an element in the map myMap.set('bar', 'baz');
Using the set()
with chaining
Since the set()
method returns back the same Map
object, you can chain the method call like below:
// Add new elements to the map with chaining. myMap.set('bar', 'foo') .set(1, 'foobar') .set(2, 'baz');
Specifications
Specification | Status | Comment |
---|---|---|
ECMAScript 2015 (6th Edition, ECMA-262) The definition of 'Map.prototype.set' in that specification. |
Standard | Initial definition. |
ECMAScript Latest Draft (ECMA-262) The definition of 'Map.prototype.set' in that specification. |
Draft |
Browser compatibility
The compatibility table on this page is generated from structured data. If you'd like to contribute to the data, please check out https://github.com/mdn/browser-compat-data and send us a pull request.
Update compatibility data on GitHub
Desktop | Mobile | Server | |||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|
set | Chrome Full support 38 | Edge Full support 12 | Firefox Full support 13 | IE
Partial support
11
| Opera Full support 25 | Safari Full support 8 | WebView Android Full support 38 | Chrome Android Full support 38 | Firefox Android Full support 14 | Opera Android Full support 25 | Safari iOS Full support 8 | Samsung Internet Android Full support 3.0 | nodejs Full support Yes |
Legend
- Full support
- Full support
- Partial support
- Partial support
- See implementation notes.
- See implementation notes.