Nik Sumeiko’s Post

Unlocking the Power of Angular Services: A Comprehensive Guide Understanding the Versatility of Services in Angular Applications. Angular, one of the most popular frontend frameworks, offers developers a structured way to build scalable web applications. A key part of this structure is the concept of services. In Angular, services are used to share data, encapsulate business logic, communicate with APIs, and manage state across components. This blog post dives into the various ways Angular services can be used, helping developers understand their full potential.

How do we design APIs that balance usability, performance, and security? API design isn’t just about creating clean URL paths. It’s about how resources are named, how identifiers are structured, and how communication happens through headers and rules. A well-designed API goes beyond endpoints — it ensures security, performance, and maintainability. The diagram below illustrates standard API design patterns using a shopping cart example. 💡 Key Insights: - Choose meaningful resource names and identifiers - Use consistent and predictable path patterns - Include essential HTTP headers for versioning and caching - Apply rate limiting and authentication at the gateway level - Design APIs that are easy for both humans and systems to use In short — good API design is both an art and a discipline. It’s what makes systems scalable and developer-friendly. #BackendDevelopment #API #SoftwareArchitecture #Django #NodeJS #BackendEngineer

✨ React Patterns Every Expert Should Master 🧩🪝 React isn’t just about writing components—it’s about writing them in scalable, reusable, and maintainable ways. That’s where design patterns come in. Let’s explore the most important React patterns, with examples, real-world use cases, and why they matter. 🌟 1️⃣ Container & Presentational Pattern 🧑💻🎨 Container Components: Handle data fetching, state, business logic. Presentational Components: Handle UI rendering only. 👉 Use Case: Keeps code clean by separating logic from UI. // Presentational const UserList = ({ users }) => ( <ul>{users.map(u => <li key={u.id}>{u.name}</li>)}</ul> ); // Container const UserListContainer = () => { const [users, setUsers] = useState([]); useEffect(() => { fetch("/api/users").then(res => res.json()).then(setUsers); }, []); return <UserList users={users} />; }; ✅ Real-world: A UserProfile component only displays data, while UserProfileContainer fetches from an API. 2️⃣ Higher-Order Components (HOC) 🔁 A function that takes a component https://lnkd.in/g79gWkAQ

✨ React Patterns Every Expert Should Master 🧩🪝 React isn’t just about writing components—it’s about writing them in scalable, reusable, and maintainable ways. That’s where design patterns come in. Let’s explore the most important React patterns, with examples, real-world use cases, and why they matter. 🌟 1️⃣ Container & Presentational Pattern 🧑💻🎨 Container Components: Handle data fetching, state, business logic. Presentational Components: Handle UI rendering only. 👉 Use Case: Keeps code clean by separating logic from UI. // Presentational const UserList = ({ users }) => ( <ul>{users.map(u => <li key={u.id}>{u.name}</li>)}</ul> ); // Container const UserListContainer = () => { const [users, setUsers] = useState([]); useEffect(() => { fetch("/api/users").then(res => res.json()).then(setUsers); }, []); return <UserList users={users} />; }; ✅ Real-world: A UserProfile component only displays data, while UserProfileContainer fetches from an API. 2️⃣ Higher-Order Components (HOC) 🔁 A function that takes a component https://lnkd.in/g79gWkAQ

# ⚛️ React Mini Project: Making the Step Progress Component Dynamic with useState \(Part 2\) Yesterday, I built a simple static Step Progress Component in React. State 🧠. This was a small step… but it made the UI come alive 🚀 Before we jump into code, let’s understand what state really is. State is basically the data that a component can hold over time. It acts like the “memory” of a component. Whenever the state changes, React re-renders the component to reflect the new UI. Think of it like this: 🧠 “State remembers things for the component between renders.” ✅ It lets us update the view dynamically when data changes. 🔁 It persists local variables between renders. 🧩 It keeps our UI in sync with the underlying data. Example: In my step progress component, the current step is stored as state. Next or Previous, the UI updates instantly. React gives us a built-in Hook to use state in functional components — useState. import \{ useState \} from "react"; Then inside the component, I created a state variable like this: const \[step, setStep\] = useState\(1\); Here’s what happens: ste https://lnkd.in/gg3ZW26H

# ⚛️ React Mini Project: Making the Step Progress Component Dynamic with useState \(Part 2\) Yesterday, I built a simple static Step Progress Component in React. State 🧠. This was a small step… but it made the UI come alive 🚀 Before we jump into code, let’s understand what state really is. State is basically the data that a component can hold over time. It acts like the “memory” of a component. Whenever the state changes, React re-renders the component to reflect the new UI. Think of it like this: 🧠 “State remembers things for the component between renders.” ✅ It lets us update the view dynamically when data changes. 🔁 It persists local variables between renders. 🧩 It keeps our UI in sync with the underlying data. Example: In my step progress component, the current step is stored as state. Next or Previous, the UI updates instantly. React gives us a built-in Hook to use state in functional components — useState. import \{ useState \} from "react"; Then inside the component, I created a state variable like this: const \[step, setStep\] = useState\(1\); Here’s what happens: ste https://lnkd.in/gg3ZW26H

I once worked on a React project that turned into a maintenance nightmare. Components scattered everywhere, business logic mixed with UI code, and nobody knew where anything belonged. Sound familiar? React gives you freedom - too much freedom. Unlike Angular with its opinionated structure and clear conventions, React lets you build however you want. That flexibility becomes a curse when teams lack architectural guidance. The result? Codebases that look like digital junkyards. ↳ Components doing everything at once ↳ Business logic spread across random files ↳ Features tangled together like spaghetti But there's a better way among different types of architecture lets focus on : Vertical Slice Architecture. Instead of organizing by technical layers (components, services, utils), you organize by features. Each slice contains everything needed for one specific capability - components, logic, API calls, types. The benefits are clear: features become self-contained, onboarding gets easier, and changes stay isolated. You can delete entire folders without breaking other parts. More https://lnkd.in/eSftahYx

⚛️ Understanding Higher Order Components (HOCs) in React When working with React, you often need to reuse logic across multiple components — like authentication, data fetching, or analytics. Instead of duplicating code, React provides a powerful pattern called the Higher Order Component (HOC). --- 🔍 What is an HOC? A Higher Order Component is a function that takes a component as input and returns a new enhanced component. It’s a design pattern that allows you to: Add additional behavior or data to a component Keep your base components simple and focused Separate reusable logic from presentation In simple terms, it’s a “component wrapper” that injects extra functionality without modifying the original component directly. --- ⚙️ Why Use HOCs? Code Reusability: Encapsulate shared logic once and apply it to multiple components. Consistency: Maintain uniform behavior across different parts of your app. Cleaner Architecture: Keeps UI and logic layers clearly separated. Scalability: Ideal for implementing features like authorization, logging, or performance tracking. --- ⚠️ The Modern Context While Custom Hooks have become the modern way to share logic in functional components, understanding HOCs is still valuable. They’re widely used in many libraries — for example, react-redux uses HOCs internally for connecting components to the store. --- 💡 Key Takeaway > A Higher Order Component (HOC) is a pattern for enhancing components through composition, not inheritance. Even as React evolves, grasping this concept helps you write more modular, maintainable, and scalable front-end code. #React #WebDevelopment #Frontend #JavaScript #ReactJS #SoftwareEngineering #CleanCode #HOC

⚙️ Singleton vs Normal Service in React — A Clean Architecture Approach In modern React applications, separating UI logic from business logic is key to writing scalable and maintainable code. That’s where Services come in — reusable layers that handle logic like API calls, state management, and data processing, keeping your components clean. 🧠 What is a Service? A Service is a class or module that contains reusable logic, independent of React components. Instead of putting business logic inside components, we define it inside services, improving testability, reusability, and structure. 🔁 Singleton Service A Singleton Service creates one shared instance across the entire app. Perfect for managing global states, tokens, or configurations. ✅ Use Cases: AuthService → Manages user tokens and sessions ConfigService → Stores app-wide configuration CacheService → Handles cached API data 🧩 Every component importing authService shares the same instance and state. ⚡ Normal Service A Normal Service creates a new instance whenever used. It’s useful for isolated logic where you don’t want shared state. ✅ Use Cases: TodoService → Handles individual API calls per component Utility helpers (formatting, date, etc.) 🌟 Advantages of Using Services in React 1. 🧠 Separation of Concerns – Keeps UI and logic independent for cleaner architecture. 2. ♻️ Reusability – Shared logic (API, validation, etc.) can be reused across multiple components. 3. 🧩 Testability – Easy to unit test without involving the React rendering layer. 4. ⚙️ Scalability – Add new features without rewriting components. 5. 🚀 Performance – Singleton services share state globally, reducing redundant API calls. 6. 🔐 Centralized Data Handling – One place for API calls, auth, and caching logic. 7. 📦 Maintainability – Business logic updates don’t affect component structure. 8. 🧭 Flexibility – Easily switch APIs or data sources by updating only the service layer. 🚀 Takeaway Using Singleton and Normal Services properly transforms your React app into a scalable, testable, and maintainable system. Keep your components focused on UI and let your services handle the logic! #ReactJS #FrontendDevelopment #JavaScript #TypeScript #CleanCode #SoftwareArchitecture #WebDevelopment #CodingBestPractices #ReactDeveloper

Most frontend devs don’t think about “millions of API calls” when writing code. We’re usually fixing layouts, handling state, or fighting with forms. But when your app starts getting real traffic, even the frontend can overload the backend. A few things that make a huge difference: -> Don’t refetch what you already have — caching on the client or browser can cut a ton of noise. -> Don’t fire a request on every keystroke or scroll — debounce and throttle exist for a reason. -> If you can send one combined request instead of dozens, do it. -> Load the UI first and refresh data in the background instead of blocking everything. -> Assume failures will happen — show old data, retry smartly, don’t leave users staring at a spinner or skeleton. -> Track errors (sentry) and latency from the frontend use — production issues don’t always show up in staging. -> And sometimes the API itself needs to change — push for endpoints that actually match how the UI works. Bad frontend API usage scales badly. Good patterns scale quietly. Next time you write a fetch call, ask yourself: Is this actually needed, or am I just adding load?