React's Context API & useReducer — Advanced State Management

React ↔ Angular reference. React examples use React 19 + TypeScript. Angular examples use modern Angular (standalone components, signals, inject(), @if/@for).

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13 questions

1
Prop Drilling: The Problem Context Solves
Prop drilling is passing data through several layers of components that don't use it, just so a deeply nested component can receive it.
2
Creating and Providing Context
createContext() creates a context object; rendering it as a provider makes a value available to every component below it.
3
Consuming Context
Reading the nearest provider's value from inside a component.
4
Linking Context to State (Outsourced Provider Component)
A dedicated component that owns the state, builds the context value (data plus functions), and wraps its children in the provider.
5
useReducer: Actions, Payloads, and Pure Reducers
A hook that manages state through a reducer function: components dispatch actions, and the reducer computes the next state.
6
Context + useReducer Together
A provider component that uses useReducer for its state and exposes the state and dispatch-based functions through context.
7
Summary