React Effects: When You Do and Don't Need Them Effects are an escape hatch to synchronize React components with external systems (browser APIs, network, third-party libraries). Most component logic does not need Effects. Before writing or keeping a , run through the scenarios below — there's likely a simpler, more performant alternative. The Two Questions Before every , ask: 1. Is this transforming data for rendering? If yes, compute it during render instead. 2. Is this handling a user event? If yes, put it in an event handler instead. If neither applies, you might actually need an Effect. --…