Use

This module exports the native Map object if Map is present. If not, a Map-like constructor function is exported that supports O(1) insertion and deletion by adding a can-cid property to objects passed to .set.

var Map = require("can-util/js/cid-map/cid-map");

var map = new Map();

var obj = {};

map.set(obj, "value");
map.get(obj) //-> "value";

The following methods and properties are supported by the polyfill:

• clear()
• delete(key)
• forEach(callback[,thisArg])
• get(key)
• has(key)
• set(key, value)
• size