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ReactReact 18+

Interview Preparation & Deep Dives

0% read0 of 142 topics

JavaScript Essentials0/14

Scope: var, let & const4 min Hoisting & the TDZ3 min Closures & Lexical Scope3 min this, call, apply & bind3 min Event Loop: Micro vs Macrotasks4 min Promises & async/await4 min Promise.all, allSettled, race3 min Reference vs Value & Copying3 min Immutable Array Methods3 min Destructuring, Spread & Rest3 min Prototypes & Inheritance4 min ES Modules & Imports4 min Implement Debounce & Throttle4 min Polyfills: map, bind, Promise.all4 min

Fundamentals0/10

The Problem React SolvesSoon

JSX & What It Compiles ToSoon

Props vs StateSoon

One-Way Data FlowSoon

Conditional RenderingSoon

List Keys & the Index PitfallSoon

Controlled vs UncontrolledSoon

Composition & childrenSoon

Functional vs Class ComponentsSoon

Event Handling & Synthetic EventsSoon

Rendering & Reconciliation0/10

Virtual DOM & ReconciliationSoon

What Triggers a Re-renderSoon

Parent & Child Re-rendersSoon

Component Identity & StateSoon

Batching & Automatic BatchingSoon

The Diffing AlgorithmSoon

Render Phase vs Commit PhaseSoon

Resetting State with keySoon

Strict Mode & Double RenderingSoon

React FiberSoon

useState0/8

How useState WorksSoon

State as a SnapshotSoon

The Functional Updater FormSoon

Immutable State UpdatesSoon

Derived StateSoon

Lifting State UpSoon

Lazy Initial StateSoon

Structuring State WellSoon

useEffect0/8

useEffect: Purpose & MisuseSoon

Dependency ArraysSoon

Stale Closures in EffectsSoon

Effect CleanupSoon

Infinite Effect LoopsSoon

Fetch Race ConditionsSoon

When Not to Use an EffectSoon

useLayoutEffect vs useEffectSoon

Refs & More Hooks0/7

useRef vs useStateSoon

Refs for DOM AccessSoon

useContext BasicsSoon

useReducerSoon

Custom HooksSoon

Rules of Hooks & WhySoon

forwardRef & ref as a Prop (React 19)Soon

Performance0/9

Causes of Unnecessary Re-rendersSoon

Referential EqualitySoon

React.memoSoon

useMemo vs useCallbackSoon

When Memoization Is UselessSoon

Code Splitting & React.lazySoon

List VirtualizationSoon

Using the React ProfilerSoon

React Compiler (React 19)Soon

State Management0/8

Local vs Global StateSoon

Prop Drilling & FixesSoon

Context Re-render ProblemSoon

Context vs ReduxSoon

Server vs Client StateSoon

Redux Data FlowSoon

Redux Toolkit: Slices & StoreSoon

Zustand BasicsSoon

Data Fetching0/6

Loading, Error & Empty StatesSoon

Cancelling with AbortControllerSoon

fetch vs AxiosSoon

Pagination & Infinite ScrollSoon

TanStack Query: Caching & RetriesSoon

Optimistic UpdatesSoon

Forms0/5

Building Controlled FormsSoon

Form ValidationSoon

React Hook Form BasicsSoon

Preventing Double SubmitsSoon

File Upload & PreviewSoon

Routing & Security0/7

React Router & Nested RoutesSoon

Route & Query ParamsSoon

Protected RoutesSoon

JWT Storage & Auth FlowSoon

Handling Expired SessionsSoon

XSS & dangerouslySetInnerHTMLSoon

CORS with a Spring/Node APISoon

Error Boundaries & Suspense0/3

Error BoundariesSoon

Suspense FundamentalsSoon

PortalsSoon

Concurrent React & React 190/5

Concurrent Rendering BasicsSoon

useTransition & useDeferredValueSoon

The use() Hook (React 19)Soon

Actions & useActionState (React 19)Soon

useOptimistic (React 19)Soon

SSR & Next.js0/4

CSR vs SSR vs SSGSoon

Hydration & MismatchesSoon

Server Components & BoundariesSoon

Next.js Rendering StrategiesSoon

Testing & Accessibility0/5

React Testing Library BasicsSoon

Testing User InteractionsSoon

Mocking API RequestsSoon

Accessibility FundamentalsSoon

Keyboard Nav & FocusSoon

Patterns & Architecture0/5

Feature-Based Folder StructureSoon

Designing Reusable ComponentsSoon

HOCs & Render PropsSoon

Compound ComponentsSoon

Controlled & Uncontrolled APIsSoon

Machine Coding: Core0/12

Counter with Functional UpdatesSoon

Todo App with FiltersSoon

Tabs & AccordionSoon

Star RatingSoon

Debounced SearchSoon

Autocomplete with Keyboard NavSoon

Pagination ComponentSoon

Modal: Escape & Outside ClickSoon

Timer / Stopwatch with CleanupSoon

useDebounce HookSoon

useFetch HookSoon

useLocalStorage HookSoon

Machine Coding: Advanced0/9

Infinite ScrollSoon

Multi-Step FormSoon

OTP InputSoon

Shopping Cart with useReducerSoon

Reusable DropdownSoon

Nested CommentsSoon

File ExplorerSoon

Data Table: Sort & FilterSoon

Undo / RedoSoon

Revision & Mock Interviews0/7

Rapid-Fire React QuestionsSoon

Predict the OutputSoon

Debug This ComponentSoon

Timed Mock InterviewSoon

Final Revision ChecklistSoon

Code Review QuestionsSoon

Real-World Scenario QuestionsSoon

The Problem React Solves

This lesson is coming soon. Browse the rest of the React syllabus in the sidebar.