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Name	Size	Permission	Date
test	[ DIR ]	drwxr-xr-x	2021-02-04 21:24
.lint	77 B	-rw-r--r--	2015-07-07 12:14
.npmignore	51 B	-rw-r--r--	2015-06-25 13:26
.travis.yml	201 B	-rw-r--r--	2017-03-15 15:47
CHANGES	1.35 KB	-rw-r--r--	2017-03-15 15:47
LICENSE	1.05 KB	-rw-r--r--	2015-06-25 13:26
README.md	1.77 KB	-rw-r--r--	2015-06-25 13:26
implement.js	211 B	-rw-r--r--	2015-06-25 13:26
index.js	97 B	-rw-r--r--	2015-06-25 13:26
is-implemented.js	614 B	-rw-r--r--	2015-08-19 06:45
is-native-implemented.js	275 B	-rw-r--r--	2015-06-25 13:26
is-weak-map.js	379 B	-rw-r--r--	2015-08-19 06:40
package.json	1.82 KB	-rw-r--r--	2021-02-04 21:24
polyfill.js	2.17 KB	-rw-r--r--	2015-07-09 07:24
valid-weak-map.js	170 B	-rw-r--r--	2015-06-25 13:26

Rename

# es6-weak-map
## WeakMap collection as specified in ECMAScript6

_Roughly inspired by Mark Miller's and Kris Kowal's [WeakMap implementation](https://github.com/drses/weak-map)_.

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

### Limitations

- Will fail on non extensible objects provided as keys

### Installation

$ 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](http://browserify.org/), [Webmake](https://github.com/medikoo/modules-webmake) or [Webpack](http://webpack.github.io/)

### Usage

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](http://people.mozilla.org/~jorendorff/es6-draft.html#sec-weakmap-objects). 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 [![Build Status](https://travis-ci.org/medikoo/es6-weak-map.svg)](https://travis-ci.org/medikoo/es6-weak-map)

$ npm test