React Project Scaffolding

Frontend Development Tools

Modern JavaScript frameworks provide CLI tools for project generation:

// Install React CLI globally
npm install -g create-react-app

// Create new project
create-react-app project-name
cd project-name
npm start

Key features include preconfigured Webpack setups, development servers, and optimized production builds.

Package Management Comparison

npm	yarn
npm install	yarn
npm install package	yarn add package
npm uninstall package	yarn remove package
npm cache clean	yarn cache clean

Component-Based Architecture

React applications are built using reusable components:

// Function component example
function UserCard({name, role}) {
  return (
    <div className="card">
      <h3>{name}</h3>
      <p>{role}</p>
    </div>
  );
}

Componant Lifecycle Methods

class DataLoader extends React.Component {
  componentDidMount() {
    fetchData(this.props.url); 
  }
  
  componentDidUpdate(prevProps) {
    if (this.props.url !== prevProps.url) {
      this.refreshData();
    }
  }
  
  componentWillUnmount() {
    this.abortController.abort();
  }
}

Component Communication Pattterns

Parent-to-child via props:

// Parent component
<UserProfile 
  avatar={user.image} 
  bio={user.description} 
/>

// Child component
function UserProfile({avatar, bio}) {
  return (
    <div>
      <img src={avatar} />
      <p>{bio}</p>
    </div>
  );
}

Child-to-parent via callback functions:

// Parent component
function SearchPage() {
  const handleSearch = (term) => {
    /* update state */
  };

  return <SearchBar onSubmit={handleSearch} />;
}

// Child component
function SearchBar({ onSubmit }) {
  return (
    <input 
      type="text" 
      onChange={(e) => onSubmit(e.target.value)} 
    />
  );
}

Slot Pattern Implementation

function CardLayout({ header, content, footer }) {
  return (
    <div className="card">
      <div className="header">{header}</div>
      <div className="content">{content}</div>
      <div className="footer">{footer}</div>
    </div>
  );
}

// Usage
<CardLayout 
  header={<UserAvatar />}
  content={<UserBio />}
  footer={<ActionButtons />}
/>

Context API for Global State

const ThemeContext = React.createContext();

function App() {
  return (
    <ThemeContext.Provider value="dark">
      <NavigationBar />
    </ThemeContext.Provider>
  );
}

function NavigationBar() {
  const theme = useContext(ThemeContext);
  return <nav className={theme}>...</nav>;
}

Component Composition Patterns

function PageLayout({ sidebar, mainContent }) {
  return (
    <div className="container">
      <aside>{sidebar}</aside>
      <main>{mainContent}</main>
    </div>
  );
}