Throughout the night, Facebook staffers all over campus collaborated and coded, mostly on mobile features designed to give Facebook a boost in its effort to reach users who more and more are accessing the service on mobile devices, not personal computers. A few worked on an evacuation tool that would track who was on campus and might need help in the event of a disaster, some even carved pumpkins. They refueled at long white tables loaded with egg rolls and other Chinese food from Jing Jing, the same Palo Alto restaurant that has been feeding hackathons for years.
As the sun rose, staffers nodded off on couches as the batteries on their laptops slowly died. The hackathon officially ended at 6 a.m. The prize for participating: a hackathon T-shirt.