Context in React
summary
Claims that Context is for sharing state only inside a component tree not as global app state and that it removes prop drilling. Uses React createContext/Provider, class property contextType (React 16.6) and the new useContext hook, and cites 16.3/16.6/hook timing. Demonstrates a fleet dashboard multi-step form sharing parent state and two updater functions, notes a rerender gotcha when passing fresh objects and fixes it by storing methods on the top-level state, and the refactor is described as working.
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