React JS Lifecycle Methods | # 4 of 100 Key Concepts | React Interview Questions

In this comprehensive tutorial, we delve into the world of React JS lifecycle methods and uncover their significance in building powerful and dynamic web applications. React lifecycle methods provide developers with precise control over the behavior of components at various stages of their lifecycle.

Throughout this tutorial, we explore the following topics:

Introduction to React Component Lifecycle: Understand the lifecycle of a React component, including the three main phases: Mounting, Updating, and Unmounting. Learn how components transition through these phases and the corresponding lifecycle methods.

Mounting Lifecycle Methods: Dive into the Mounting phase and explore essential lifecycle methods like constructor, render, componentDidMount, and more. Understand their purpose and how they can be used to perform initialization tasks and interact with external APIs or data sources.

Updating Lifecycle Methods: Learn about the Updating phase and key methods such as componentDidUpdate, shouldComponentUpdate, and getSnapshotBeforeUpdate. Discover how these methods enable you to handle component updates efficiently, manage state changes, and optimize rendering.

Unmounting Lifecycle Methods: Explore the Unmounting phase and the componentWillUnmount method. See how this method allows you to clean up resources, event listeners, or subscriptions before a component is removed from the DOM.

Error Handling Lifecycle Methods: Discover the Error Handling phase and the componentDidCatch method. Learn how to gracefully handle errors that occur within component hierarchies and display fallback UIs.

Legacy Lifecycle Methods: Get introduced to the legacy lifecycle methods that were deprecated in React 16.3 and understand their replacements and alternative approaches.

Lifecycle Methods Best Practices: Explore best practices for using React lifecycle methods effectively. Learn about their optimal use cases, avoiding anti-patterns, and how to make informed decisions about their usage in different scenarios.

By the end of this tutorial, you'll have a deep understanding of React JS lifecycle methods and their role in controlling component behavior throughout the application lifecycle. Whether you're a beginner or an experienced React developer, this comprehensive guide will enhance your knowledge and empower you to build robust and performant React applications.

100 React JS Topics in this series
1. React
2. Props
3. State
4. Lifecycle Methods
5. Virtual DOM
6. React Router
7. Hooks
8. Context API
9. Redux
10. Higher-Order Components (HOCs)
11. Render
12. Reconciliation
13. Unidirectional Data Flow
14. Synthetic Events
15. Event Handling
16. Conditional Rendering
17. List Rendering
18. Fragments
19. Error Boundaries
20. Refs
21. Portal
22. Key
23. PropTypes
24. CSS-in-JS
25. Inline Styling
26. CSS Modules
27. Styled Components
28. CSS Preprocessors (e.g., Sass, Less)
29. CSS Frameworks (e.g., Bootstrap, Material-UI)
30. React Testing Library
31. Jest
32. Enzyme
33. Code Splitting
34. Lazy Loading
35. Suspense
36. Higher-Order Functions
37. Functional Components
38. Class Components
39. PureComponent
40. Memo
41. Render Props
42. Context Consumer
43. Context Provider
45. useEffect Hook
46. useState Hook
47. useContext Hook
48. useReducer Hook
49. useMemo Hook
50. useCallback Hook
51. useRef Hook

52. Custom Hooks
53. Controlled Components
54. Uncontrolled Components
55. Higher-Order Reducers
56. Actions
57. Reducers
58. Store
59. Middleware
60. Thunks
61. Redux DevTools
62. Selectors
63. Flux Architecture
64. Animation Libraries (e.g., React Spring, Framer Motion)
65. Form Libraries (e.g., Formik, react-hook-form)
66. Internationalization (i18n)
67. React Intl
68. Stateful Components
69. Stateless Components
70. JSX (JavaScript XML)
71. JSX Expression
72. JSX Attributes
73. JSX Fragments
74. JSX Spread Attributes
75. JSX Children
76. JSX Self-Closing Tags
77. JSX Loops
78. JSX Inline Styling
79. JSX Composition
80. JSX Transformation
81. React DOM
82.
83. Router Components (BrowserRouter, HashRouter, MemoryRouter)
84. Route Component
85. Switch Component
86. Link Component
87. NavLink Component
88. Redirect Component
89. History API
90. Router Props (history, location, match)
91. Router Configuration
92. Router Guards
93. Provider Component
94. Consumer Component
95. Redux Saga
96. Component Testing
97. Unit Testing
98. Mocking
99. Data Fetching Libraries (e.g., Axios, SWR)