Mastering React Fundamentals: The Complete Beginner's Course

Install React.js by creating a new project in your terminal, naming it, and selecting React.js with JavaScript, then open the folder in VSCode and install packages with npm install.

Navigate the project structure by inspecting node_modules, public, and especially src with assets, app.css, index.css, App.jsx, and main.js, plus key files like .gitignore, eslint.config.js, index.html, package.json, and config.js.

Delete unused folders and files like public, access, apks, and index.css to clean a React project. Create and export a simple component, run npm run dev, and confirm hello renders.

Components are independent, reusable bits of code that render HTML or JSX, enabling modular React.js UI by composing navbar, search bar, menu, article, and reusable card components.

Create a React component by writing a JavaScript function, name it with an uppercase first letter, and return HTML from the component using either function or arrow syntax.

Create your first React component from scratch using a function or arrow function, uppercase first letter, return JSX, export default, and render it in the UI with main.js and index.html.

Create a components folder with greet and grid components in jsx, export them, and render them in the app, using the R Afce snippet for boilerplate.

Discover how JSX lets you write HTML in React JS, creating an HTML-like illusion that is actually JavaScript behind the scenes, with the compiler converting it to pure JavaScript.

Learn how JSX in React.js lets you write HTML inside JavaScript, build components with sections, ids, headings, and className, and convert HTML to JavaScript using Babel.

Explore essential JSX rules, including returning a single parent element, closing all tags, using className for styling, and using htmlFor for label associations in forms.

Learn how JSX expressions evaluate JavaScript inside curly braces to render the result, using variables, functions, or properties within the UI, and distinguish from plain text.

Learn to render dynamic content in JSX by wrapping expressions in curly braces, injecting variables, arrays, and functions, and applying dynamic class names in React.

Create and render lists in React using the map method, render usernames, emails, and locations from a user info array, ensure unique keys, and understand basic destructuring.

Pass data from a parent component to a child using props, such as image paths, booleans, and hobbies, via HTML attributes; access values with a props parameter and dot notation.

Learn to pass data from a parent to a child with props, access and render name, age, and hobbies, and use prop destructuring for cleaner code.

Learn how to pass data from a parent to a child component using props and the children property, by creating a components folder, a function component, and destructuring props.

Conditionally render content in React using if and else, the ternary operator, and the n operator to show valid or invalid password components based on props.

Explains conditional rendering in React by building password components (valid/invalid) driven by an isValid prop, refactoring with a ternary, and rendering a cart with item lists and empty-state handling.

Learn basic styling in React using inline styles with the style attribute and camelCase properties, create a styles object, apply a separate index.css, and use React icons for icons.

Build and attach React events by creating a button component and wiring on click, on copy, and mouse move handlers, while logging interactions to the console.

Master state with the useState hook in functional components, setting initial values and updating data that affects rendering. Learn why hooks replaced class-based components in React 16.8 and beyond.

Master the useState hook in React by importing, destructuring, and updating count, array, and object states, using set functions, mapping, filtering, and sharing state via props.

Learn how to pass a function as the useState initial value, including arrow functions, previous-state updates, and practical examples with counters, random numbers, and local storage persistence using useEffect.

Discover how to render a popup via react portal by copying input text to the clipboard and displaying a temporary confirmation in a separate dom node.

Explains the useEffect hook for performing side effects in a component, such as data fetching, updates to the dom, and console logging, including dependency arrays and render behavior.

Explore how the useEffect hook works with the useState to run code on first render, on updates, and with dependencies. Learn data fetching patterns and proper dependency handling in React.