Zoom should be called when chart is applicable for it about angular-chart

[maxklenk]

Thank you for create an issue for your problem, this helps a lot.

I was not able to reproduce your problem, can you please adopt this plnkr to show me when it fails.

https://plnkr.co/edit/BT1CFkMAXFTjo5Jzh1LK?p=preview

[random-one]

@maxklenk I managed to reproduce it but including one more dependency - ui-router. This is actually my real use case, but I never thought this could break the charts...
Please see my plunk here: https://plnkr.co/KOMKGekcJNkQVOIblFum
It's forked from yours. Switch quickly between the two states(to reproduce it easier) with the buttons on each state until you see the this.config is null message in the developer console and the chart will not appear until app is reloaded.

[maxklenk]

puh, I see. Interesting bug, we should check if destruction of the chart is not finished and is responsible for this strange behavior. If you find a solution please tell me.

[random-one]

Like I told you I traced it to the applyZoom in the ChartService.prototype.stateCallback function. And when I don't call it it does not happen which is strange to me too.
My "solution"(and I am not proud of it, but I need the charts to always appear) is a monkey-patched chartService that uses the code of applyZoom before you removed the check.

Maybe this stateCallback needs to me smarter?