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have one primary responsibility.
Good examples:
* SearchBar
* LoginForm
* Navbar
* UserProfile
* ProductCard
Poor example: DashboardComponent
✓ Authentication
✓ API calls
✓ Navigation
✓ Charts
✓ Forms
✓ Notifications
✓ Payments When a component handles too many responsibilities, it becomes harder to maintain and reuse. Organizing Components As applications grow, organizing components becomes increasingly important.
A common folder structure looks like this: src
│
├── components
│ ├── Button
│ ├── Card
│ ├── Modal
│ └── Navbar
│
├── pages
│
├── layouts
│
├── hooks
│
├── services
│
└── utils Keeping related files together improves discoverability and collaboration. Presentational vs Container Components A useful design pattern is separating components based on their responsibility. Presentational Components These focus only on displaying data.
Examples:
* Button
* Card
* Avatar
* Badge
They receive data and render UI. Container Components These handle application logic.
Responsibilities may include:
* Fetching data
* Managing state
* Calling APIs
* Passing data to child components
Separating UI from business logic keeps components cleaner and easier to test. Naming Components Choose names that clearly describe the component's purpose.
Good examples:
* UserProfile
* CheckoutForm
* PaymentSummary
* OrderHistory
* NavigationMenu
Avoid generic names like:
* Component1
* Data
* Temp
* TestComponent
Meaningful names improve readability across the codebase. Component Reusability A reusable component should:
* Solve one problem
* Avoid unnecessary dependencies
* Be configurable
* Be easy to understand
* Work in multiple parts of the application
Enterprise applications often rely on reusable component libraries to maintain consistency and speed up development. Best Practices When building React components:
* Keep components focused on a single responsibility.
* Prefer composition over duplication.
* Use descriptive names.
* Organize components into logical folders.
* Avoid creating excessively large components.
* Separate UI rendering from business logic where appropriate.
Following these practices leads to code that is easier to scale and maintain. Key Takeaways Today, we learned:
✅ Components are the foundation of every React application.
✅ Functional components are the modern standard in React.
✅ Component composition enables scalable application architecture.
✅ Smaller, focused components are easier to maintain and reuse.
✅ Organizing components thoughtfully improves collaboration and code quality. Coming Next 🚀 In Day 6, we'll explore one of the most important concepts in React: Props – Passing Data Between Components You'll learn:
* What props are
* Why props are immutable
* Passing primitive values
* Passing objects and arrays
* Passing functions as props
* Children props
* Best practices for designing reusable components
Understanding props is the first step toward building dynamic and interactive React applications.
Happy Coding! 🚀