Battery?

Hi, driving home today (99 sunfire) the battery light came on. Everything still works like the lights, radio etc but when I try to turn it over it wont start and it looses all electronics. I don’t think the battery is dead although I do intend to check. The alternator seems ok because there were no related problems such as overheating or rpms going all wonky. What else could the problem be? could it be the starter?

could be a bad connection to ground or battery er sumpthin