Learn This Concept to be proficient in React Js.

Don't Confuse to learn ReactJs.

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• Functional Components
• Class Components
• JSX (JavaScript XML) Syntax

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• Passing Props
• Default Props
• Prop Types

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• useState Hook
• Class Component State
• Immutable State

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• componentDidMount
• componentDidUpdate
• componentWillUnmount

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• useState
• useEffect
• useContext
• useReducer
• useCallback
• useMemo
• useRef
• useImperativeHandle
• useLayoutEffect

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• Handling Events in Functional Components
• Handling Events in Class Components

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• if Statements
• Ternary Operators
• Logical && Operator

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• Rendering Lists
• Keys in React Lists

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• Reusing Components
• Children Props
• Composition vs Inheritance

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• Creating HOCs
• Using HOCs for Reusability

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• Using Render Props Pattern

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• Route Parameters

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• useHistory Hook
• useLocation Hook

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• Creating Context
• useContext Hook

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• Actions
• Reducers
• Store
• connect Function (React-Redux)

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• Handling Form Data
• Controlled Components
• Uncontrolled Components ??. ???? ???????
• useEffect for Data Fetching
• useEffect Cleanup

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• Fetch API
• Axios Library

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• componentDidCatch (Class Components)
• ErrorBoundary Component (Functional Components)

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• Jest Testing Framework
• React Testing Library

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• Memoization
• Profiling and Performance Monitoring

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• Create React App (CRA)
• Production Builds
• Deployment Strategies

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• Styled-components
• CSS Modules ??. ????? ?????????? ?????????
• Redux
• MobX ??. ??????? ?????????
• React Router
• Reach Router

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