This is an experimental technology, part of the Harmony (EcmaScript 6) proposal. Because this technology's specification has not stabilized, check the compatibility table for usage in various browsers. Also note that the syntax and behavior of an experimental technology is subject to change in future version of browsers as the spec changes.
Summary
The set() method adds a new element with a specified key and value to a Map object.
Syntax
myMap.set(key, value);
Parameters
key
Required. The key of the element to add to the Map object.
value
Required. The value of the element to add to the Map object.
Examples
Example: Using the set method
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", "fuuu");