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paulmillr / es6-shim

ECMAScript 6 compatibility shims for legacy JS engines
http://paulmillr.com
MIT License
3.11k stars 389 forks source link

Fix supportSubclassing check for Map in Firefox 32 #294

Closed amasad closed 9 years ago

amasad commented 9 years ago

Firefox 32 is ok with instantiating a Map subclass but will throw when an operation is called on the instance.

TypeError: set method called on incompatible Object
ljharb commented 9 years ago

Awesome, thanks!!!