Fixed constructor bug in IE10

[codeflyer]

The props are not available in the constructor in IE10, adding a check on this.props before using it helps to prevent an error.

[STRML]

Is this a Babel bug?

[STRML]

Perhaps proto-to-assign will fix this - see https://babeljs.algolia.com/docs/advanced/caveats/#internet-explorer

[codeflyer]

Thanks for the quick answer, I'm checking, I'll let you know ASAP

[codeflyer]

I've tried to add the transform but i still have the error:
"unable to get property 'start' of undefined or null reference"

[
'transform-es2015-block-scoping',
['transform-es2015-classes', {loose: true}],
'transform-proto-to-assign'
]

With this solution the call of a constructor works and if I try to log the props in the constructor are finally available (without this transform thy are not available babel/babelify#133)

But in the code you don't use a contructor, but static calls.

...I'll continue on my search

[STRML]

This was fixed in #158.