React

1. 1

   Что такое React?

   What React isComponents as functionsVirtual DOM intuitionRendering JSXCreating a Vite app
   25 мин
2. 2

   JSX и компоненты (Components)

   JSX syntax rulesSingle root elementClassName vs classEmbedding expressions with {}Defining componentsComposing components
   30 мин
3. 3

   Параметры (Props)

   Passing props as attributesReceiving props objectDestructuring props in signatureDefault valuesThinking about prop shapes
   30 мин
4. 4

   Состояние (State) с помощью useState

   UseState hookReading stateCalling the setterUpdater function formNever mutate stateCounter pattern
   35 мин
5. 5

   Обработка событий

   OnClick handlerOnChange basicsPassing functions vs calling themEvent objectPassing handlers as props
   30 мин
6. 6

   Условный рендеринг и списки

   && for show/hideTernary for either/orMapping arrays to JSXThe key propWhy keys need to be stable
   30 мин
7. 7

   Формы и управляемые поля ввода (Controlled Inputs)

   Controlled input patternValue and onChange togetherMulti-field form stateOnSubmit and preventDefaultGathering form data
   35 мин
8. 8

   Эффекты (Effects) с useEffect

   What counts as a side effectUseEffect signatureDependency arrayRunning on mount onlyCleanup functionSubscribe/unsubscribe pattern
   40 мин
9. 9

   Компоновка компонентов (Components)

   Children propWrapping componentsPassing JSX as propsLifting state upThinking in component trees
   35 мин
10. 10

    Context и useContext

    CreateContextContext.ProviderUseContextWhen context is the right toolContext vs prop drilling tradeoffs
    35 мин
11. 11

    useReducer

    When to reach for useReducerReducer function shapeAction objectsDispatchCombining useReducer with useContext
    35 мин
12. 12

    Пользовательские хуки (Hooks)

    Extracting stateful logic into a functionUse prefix conventionUseToggle exampleUseLocalStorage exampleHooks rules
    35 мин
13. 13

    Производительность и мемоизация (Memoization)

    React.memo for componentsUseMemo for expensive computationsUseCallback for stable function referencesWhen memoization is overkillMeasuring before optimizing
    35 мин
14. 14

    Получение данных

    Fetch inside useEffectLoading/error/data statesAbortController cleanupPreventing setState after unmountMention TanStack Query as a next step
    40 мин
15. 15

    Маршрутизация с React Router

    Installing react-router-domBrowserRouterRoutes and RouteLink for navigationUseParamsUseNavigate
    40 мин
16. 16

    Тестирование компонентов React (Components)

    Vitest + React Testing Library setupRender and screenGetByRole queriesUserEvent for interactionsWriting one good button test
    40 мин
17. 17

    Итоговый проект: приложение со списком задач

    Combining state, lists, controlled inputsCustom hook for localStorage persistenceSmall routing setupPutting it together
    60 мин

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