React top 50 concepts
Tags: react, concepts, beginners, javascript
Published: 2024-03-04 18:22:36

1.  **Component:** The building block of React applications.
2.  **JSX:** A syntax extension for JavaScript, used with React to describe what the UI should look like.
3.  **Props:** Short for properties, used to pass data from parent to child components.
4.  **State:** Internal data management within a component.
5.  **Lifecycle methods:** Functions that are automatically called during the lifecycle of a component.
6.  **Hooks:** Functions that allow you to use state and other React features without writing a class.
7.  **useState:** A hook that allows functional components to use state.
8.  **useEffect:** A hook that allows performing side effects in functional components.
9.  **Component Lifecycle:** The series of stages a component goes through from birth to death.
10.  **Rendering:** The process of converting React components into UI elements.
11.  **Virtual DOM:** A lightweight copy of the DOM maintained by React for efficient rendering.
12.  **Reconciliation:** The process of updating the DOM efficiently based on changes in the virtual DOM.
13.  **Conditional Rendering:** Showing different UI based on certain conditions.
14.  **Event Handling:** Managing user interactions such as clicks and input changes.
15.  **Forms:** Handling user input through form elements.
16.  **Refs:** A way to access DOM nodes or React elements created in the render method.
17.  **Context:** A way to share data between components without having to pass props manually at every level.
18.  **Higher-Order Components (HOCs):** Functions that take a component and return a new component with additional functionality.
19.  **Render Props:** A technique for sharing code between components using a prop whose value is a function.
20.  **Fragment:** A way to group multiple children without adding extra nodes to the DOM.
21.  **Portals:** A way to render children into a DOM node that exists outside the DOM hierarchy of the parent component.
22.  **Error Boundaries:** Components that catch JavaScript errors anywhere in their child component tree.
23.  **Optimizing Performance:** Techniques for improving the performance of React applications.
24.  **Memoization:** Storing the results of expensive function calls and returning the cached result when the same inputs occur again.
25.  **Pure Components:** Components that only re-render when their props or state change.
26.  **Immutable Data:** Data that cannot be changed once created, helping to prevent bugs.
27.  **Key Prop:** A special attribute used by React to identify which items have changed, been added, or been removed.
28.  **Hooks Rules:** Rules and best practices for using hooks in React.
29.  **Testing:** Techniques and libraries for testing React components.
30.  **Server-Side Rendering (SSR):** Rendering React components on the server and sending the HTML to the client.
31.  **Static Type Checking:** Using tools like TypeScript or Flow to add static type checking to React applications.
32.  **Error Handling:** Handling errors gracefully in React applications.
33.  **Code Splitting:** Splitting the code into smaller bundles that can be loaded on demand.
34.  **Context Providers:** Components that provide data to their children via context.
35.  **Context Consumers:** Components that consume data from context providers.
36.  **Event Bubbling and Capturing:** The order in which events are handled in the DOM hierarchy.
37.  **CSS-in-JS:** Writing CSS directly in JavaScript files using libraries like styled-components or Emotion.
38.  **Server Components:** React components that are rendered on the server and sent to the client.
39.  **Suspense:** A feature that allows components to suspend rendering while waiting for data to load.
40.  **Lazy Loading:** Delaying the loading of components until they are needed.
41.  **Error Boundaries:** Components that catch JavaScript errors anywhere in their child component tree.
42.  **Code Splitting:** Splitting the code into smaller bundles that can be loaded on demand.
43.  **Web Components:** A set of web platform APIs that allow you to create new custom, reusable, encapsulated HTML tags to use in web pages and web apps.
44.  **Tree Shaking:** A process that removes unused code from the final bundle.
45.  **TypeScript with React:** Using TypeScript for type safety in React applications.
46.  **PropTypes:** A library for type-checking props in React components.
47.  **React Router:** A library for routing in React applications.
48.  **Redux:** A predictable state container for JavaScript apps, often used with React for managing application state.
49.  **Context API:** React's built-in state management solution for sharing data across the component tree.
50.  **React Native:** A framework for building native applications using React.