Shim for ES6 WeakMap
JavaScript
Latest commit 3756eff Oct 15, 2014 @sorvell sorvell Update README.md

README.md

DEPRECATED

This repo has moved to https://github.com/Polymer/webcomponentsjs

WeakMap

Shim for ES6 WeakMap

Shim Limitations

As ES5 Javascript does not have the ability to use weak references, the key-value association must be held strongly somwhere.

In order to hold the key "weakly", a key property of WeakMap, the value is added to key as a hidden, randomly named property. This strategy avoids the possible memory leak of having two arrays holding keys and values, but does mean that key cannot be a frozen object.