One big question people have when building frontend applications is, what’s the best way to keep backend data synced with my frontend data? You seem to always get different answers from different people and the dreaded “It depends”. Well, what does it depend on? Here are the four main ways that developers keep their data in sync and the reasons why you might choose one over the other. 1. Refresh data on every action You could refresh the data on every action that the user takes.