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This video provides a comprehensive, free React.js tutorial for beginners in 2024. The instructor covers React fundamentals, installation, component creation, styling techniques (external CSS, modules, inline styles), props, conditional rendering, list rendering, event handling, state management with useState and useEffect hooks, and building several sample applications (color picker, to-do list, digital clock, stopwatch).
useState hook for managing component state. Also showed how to update objects and arrays within state.onClick), onChange events in form elements (input, textarea, select, radio), and using the event object for dynamic responses.if statements and ternary operators, and rendering lists using the map method, including key prop usage and array manipulation.useEffect Hook: Explained how to use the useEffect hook for performing side effects (e.g., updating the document title, adding event listeners), managing dependencies, and implementing cleanup functions.useContext Hook: Illustrated the use of useContext for sharing data across multiple nested components without prop drilling.useRef Hook: Explained the use of useRef for creating references to DOM elements or values without causing re-renders, useful for manipulating elements or managing timers.