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es6-weak-map

WeakMap collection as specified in ECMAScript6

_Roughly inspired by Mark Miller's and Kris Kowal's WeakMap implementation_.

Differences are:

- Assumes compliant ES5 environment (no weird ES3 workarounds or hacks)
- Well modularized CJS style
- Based on one solution.

$3

- Will fail on non extensible objects provided as keys

$3

$ npm install es6-weak-map

To port it to Browser or any other (non CJS) environment, use your favorite CJS bundler. No favorite yet? Try: Browserify, Webmake or Webpack

$3

If you want to make sure your environment implements WeakMap, do:

``javascript
require("es6-weak-map/implement");
`

If you'd like to use native version when it exists and fallback to polyfill if it doesn't, but without implementing WeakMap on global scope, do:

`javascript
var WeakMap = require("es6-weak-map");
`

If you strictly want to use polyfill even if native WeakMap exists, do:

`javascript
var WeakMap = require("es6-weak-map/polyfill");
`

#### API

Best is to refer to specification. Still if you want quick look, follow example:

`javascript
var WeakMap = require("es6-weak-map");

var map = new WeakMap();
var obj = {};

map.set(obj, "foo"); // map
map.get(obj); // 'foo'
map.has(obj); // true
map.delete(obj); // true
map.get(obj); // undefined
map.has(obj); // false
map.set(obj, "bar"); // map
map.has(obj); // false
``

Tests

$ npm test

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