Problems whit c3js on ionic

I have my graph when i launch with “ionic serve --lab” and it’s work very well. But when i try it on emulator (ios) or real device, nothing’s happen …
Somebody have ever see it ? Or have an idea why that’s happen ?
I use AngularJS with C3.js, i take my data in a json.

Thanks !!
(Sorry for my english, i’m not speak english very well :wink: )