insertRule() syntax error in IE11

[tajo]

Hey,

I'm getting this error in MSIE 11 / Win 8.1:

I'm not sure why, because it looks Ok.

[tajo]

I see it's a part of react-kit. On your demo website there are no errors. Weird.

[dallonf]

I'm also seeing this problem in PhantomJS.

[rolandsusans]

The same when testing :

on IE Edge  -> works 
on IE 10    -> works 
on IE 9     -> syntax Error

btw, also demo page shows errors when using IE 9.

Maybe there is way to make fallback for browsers, that does't have support?

[badmotorfinger]

It's because the CSS parameter being passed into insertRule is invalid or not recognised by the browser.