Deep Instruction · Foundation
React — State, Rendering, and Component Design
Build TaskFlow Lite in React while learning state ownership, derived data, forms, effects, and composition.
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React Rendering Mental Model
Treat UI as a projection of state rather than a sequence of manual DOM edits.
Components, Props, and Composition
Use props as explicit inputs and keep ownership clear.
useState, Functional Updates, and Identity
Update state from the previous value when the next value depends on it.
Controlled Forms and Validation Boundaries
Understand what the browser controls, what React controls, and when a form library becomes useful.
Derived State, Filtering, and Search
Compute what can be derived instead of synchronizing duplicate state.
useEffect: Synchronization, Not a Default Tool
Use effects to synchronize with external systems, not to compute ordinary render data.
Custom Hooks and Reusable Behavior
Extract behavior when several components need the same stateful mechanism, not just to shorten files.
Capstone: TaskFlow Lite React
Assemble create/edit/complete/filter/search/persistence into one coherent frontend.