React JS Explained In 10 Minutes

This video introduces React, a JavaScript library for building user interfaces, commonly used in websites like Facebook and Netflix. It covers essential concepts for React developers:

• Single Page Applications (SPAs):Unlike traditional websites with multiple templates, SPAs use one template, dynamically updating components in the DOM.
• Components:Reusable UI pieces, built as JavaScript classes or functions (preferably functional with hooks), returning JSX (JavaScript XML), which resembles HTML but allows JavaScript logic.
• React Router:Manages multiple pages in SPAs by syncing UI with URLs, rendering components based on the current URL.
• Props:Data passed between components, though excessive “prop drilling” can be managed with solutions like the Context API or Redux.
• State:A JavaScript object representing component data, managed with hooks like `useState` in functional components.
• Component Lifecycle:Includes mounting, updating, and unmounting phases, handled by `useEffect` in functional components.
• React Hooks:Enable state and lifecycle management in functional components.
• State Management:Global state solutions like Context API or Redux avoid prop drilling.
• Virtual DOM:A lightweight representation of the real DOM, optimizing updates.
• Key Prop:Unique identifiers for list items to optimize rendering.
• Event Listeners:Handled inline with camelCase names (e.g., `onClick`).
• Forms:Managed by updating component state via event listeners.
• Conditional Rendering:Displays content based on conditions using logical operators.
• Common Commands:`create-react-app`, `start`, and `run build` for project setup, development, and deployment.

Source: Dennis Ivy