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paulmillr / es6-shim

ECMAScript 6 compatibility shims for legacy JS engines
http://paulmillr.com
MIT License
3.11k stars 387 forks source link

Array.prototype[H.unscopables] is undefined in Firefox #419

Open voronianski opened 8 years ago

voronianski commented 8 years ago

Is anybody experiencing this exception in Firefox?

TypeError: Array.prototype[H.unscopables] is undefined

FF 47.0.1, OS X 10.11.5, es6-shim 0.35.1

ljharb commented 8 years ago

That seems like a minification issue (it works fine on the unminified source) - are you minifying es6-shim yourself, or using our build? Can you provide a jsfiddle or similar that can reproduce the problem?