DEV Community: Anuj Bansal

Mastering React Server Components: Understanding the Server/Client Boundary

Anuj Bansal — Tue, 08 Sep 2026 16:48:00 +0000

Mastering React Server Components: Understanding the Server/Client Boundary

React Server Components introduce a different way of thinking about frontend architecture.

The biggest shift isn't simply that some components render on the server.

The important question is:

What actually needs to run in the browser?

Understanding this question makes RSC much easier to reason about.

Server Components vs Client Components

A simplified mental model is:

Server Components
↓
Server rendering / data
↓
Client Components
↓
Browser interaction

Server Components are useful for UI that doesn't require client-side interactivity.

Client Components are appropriate when the component needs browser-side capabilities.

For example:

State
Event handlers
Browser APIs
Interactive UI
Client-side effects
Don't make everything a Client Component

One of the easiest mistakes when starting with RSC is treating "use client" as the default.

It shouldn't be.

Instead, start with a Server Component and introduce a Client Component when the UI actually needs client-side capabilities.

This creates a more intentional boundary.

Why the boundary matters

The Server/Client boundary affects several areas of an application.

JavaScript sent to the browser

Moving unnecessary components to the client can increase the amount of JavaScript the browser needs to process.

Data fetching

Server Components can fetch data closer to where server-side work happens.

This can simplify certain data-fetching patterns.

Component architecture

Instead of thinking only in terms of reusable components, developers also need to think about where those components execute.

Performance

Reducing unnecessary client-side work can improve the amount of work performed by the browser.

But RSC shouldn't be treated as an automatic performance solution.

The application still needs good data fetching, caching, rendering and asset strategies.

When should a component be client-side?

A useful starting checklist is:

Does it need useState?

Does it need event handlers?

Does it access browser APIs?

Does it require client-side effects?

Does it depend on a library that requires the browser?

If the answer is no, there may be no reason to move that component to the client.

Composition becomes important

A common pattern is to keep larger parts of the UI on the server while isolating interactive pieces.

For example:

Dashboard
│
├── Server Component
│ ├── Header
│ ├── Data
│ └── Statistics
│
└── Client Component
├── Filters
└── Interactive Controls

The interactive portion can remain client-side without turning the entire page into a Client Component.

RSC isn't about eliminating Client Components

This is an important distinction.

The goal isn't:

Server Components everywhere.

The goal is:

Use the appropriate execution environment for each part of the application.

Server Components and Client Components solve different problems.

Good architecture comes from understanding that difference.

The mental model I use

When creating a component, I ask:

What does this component need?
Where does that work need to happen?
Does the browser actually need this code?
Can the server handle the data/rendering work?
Where should the client boundary begin?

That mental model is more useful than memorizing a list of RSC rules.

Final takeaway

React Server Components are not simply a new rendering technique.

They introduce another architectural dimension:

Where should this code execute?

Once that question becomes part of component design, the Server/Client model becomes much easier to reason about.

Full article:

https://www.anujbansaldev.in/blog/mastering-react-server-components

Keywords: React Server Components, RSC, Next.js, React, JavaScript, Server Rendering, Client Components, Frontend Architecture, Web Performance

Frontend & UX: Building Interfaces That Scale With the Product

Anuj Bansal — Fri, 04 Sep 2026 04:31:00 +0000

Frontend & UX: Building Interfaces That Scale With the Product

A frontend can be technically correct and still provide a poor user experience.

It can have clean React components, a well-structured Next.js application and reusable UI — but if users can't understand the interface or the application feels slow, the implementation hasn't solved the actual problem.

Frontend architecture and UX need to be considered together.

Start with the user journey

Before building components, understand what the user needs to accomplish.

The interface should make the important actions obvious.

Navigation, hierarchy, forms, feedback and content should all support that journey.

Component architecture

Reusable components are useful, but not everything needs to become a generic component.

A useful component should have:

A clear responsibility
Predictable inputs
Consistent behavior
Reusable visual patterns
Reasonable flexibility

Over-abstraction can be just as problematic as duplication.

Responsive design

Responsive design shouldn't mean simply adding a few media queries.

The layout should be designed around how content and interactions behave at different viewport sizes.

Think about:

Navigation
Typography
Forms
Tables
Cards
Images
Touch interactions
Spacing

Mobile should not feel like a compressed desktop interface.

Loading, empty and error states

One of the most overlooked areas of frontend development is state design.

A production interface needs to account for:

Loading

What does the user see while data is being retrieved?

Empty

What happens when there is no data?

Error

How does the user recover when something fails?

Success

How is the completed action communicated?

These states are part of the UX, not edge cases.

Performance

A beautiful interface that takes too long to become usable is still a poor experience.

With React and Next.js, frontend performance can involve:

Server rendering
Code splitting
Image optimization
Lazy loading
Reducing unnecessary client-side JavaScript
Caching
Efficient data fetching

Performance should be considered during architecture rather than treated as a final optimization step.

Accessibility

Accessibility shouldn't be an afterthought.

Semantic HTML, keyboard navigation, focus management, sufficient contrast, meaningful labels and appropriate ARIA usage can make an application significantly easier to use.

Design systems

As the product grows, consistency becomes increasingly important.

A design system can establish reusable:

Colors
Typography
Spacing
Buttons
Inputs
Cards
Modals
Navigation patterns

This improves both development speed and user familiarity.

Animation

Animation should communicate something.

It can help users understand:

Where something came from
What changed
What is interactive
What action was completed

If an animation doesn't improve understanding or interaction, it may simply be visual noise.

Final principle

Good frontend development isn't about producing more UI.

It's about creating an interface that helps users accomplish their goals while keeping the underlying system maintainable.

The best result is where:

Good UX + Good architecture + Good performance

work together.

Read the complete article:

https://www.anujbansaldev.in/blog/building-production-ready-web-application-2026#frontend

Keywords: Frontend Development, UX, UI, React, Next.js, Responsive Design, Web Performance, Accessibility, Design Systems

Architecture & Planning: How I Approach a Production-Ready Web Application

Anuj Bansal — Tue, 01 Sep 2026 04:00:00 +0000

A production-ready application is not simply an application that works.

It needs to remain understandable, maintainable and reliable as the number of features, users and integrations increases.

That means architecture needs to be considered before implementation.

Start with the system, not the components

Before creating individual components or API endpoints, I want to understand the major responsibilities of the application.

For a modern Next.js + Node.js/MERN application, a useful starting model is:

Frontend → API → Business Logic → Database → Infrastructure

Each layer should have a clear responsibility.

Frontend architecture

The frontend should handle presentation, interaction and client-side state where appropriate.

Important questions include:

How should routes be structured?
Which components should be reusable?
Which logic belongs on the server?
Which logic belongs on the client?
How should forms be validated?
How should loading and error states work?

The goal is to avoid turning individual UI components into containers for unrelated business logic.

API architecture

The API becomes the contract between the frontend and backend.

I want clear rules for:

Authentication
Authorization
Validation
Error responses
Pagination
Rate limiting
Logging
API versioning where necessary

An API that works today but has inconsistent contracts becomes difficult to maintain later.

Business logic

Business rules should have a clear home.

If the same business rule is implemented inside multiple API routes, controllers and frontend components, changes become risky.

Keeping business logic isolated makes it easier to test and modify.

Database design

Database design should follow the application's domain and query patterns.

For MongoDB, this means thinking about:

Collections
Relationships
Indexes
Query patterns
Aggregations
Data duplication
Growth

The database should not simply mirror the frontend UI.

It should represent the application's actual data requirements.

Authentication and authorization

Authentication answers:

Who are you?

Authorization answers:

What are you allowed to do?

These should be treated as separate architectural concerns.

For applications with multiple roles, RBAC should be enforced at the backend rather than relying only on frontend visibility.

Infrastructure

Production architecture also includes everything outside the application code.

That means:

Environment configuration
Reverse proxy
Process management
CI/CD
Logging
Monitoring
Backups
Security
Deployment strategy

A locally working application isn't automatically production-ready.

Avoid over-engineering

Architecture doesn't mean creating microservices for every feature.

It doesn't mean adding queues, event buses and multiple databases before they are necessary.

The better question is:

What complexity does the application actually need?

Start with clear boundaries.

Add complexity when the requirements justify it.

Final principle

The goal isn't to design the most sophisticated architecture.

The goal is to design an architecture where responsibilities are clear enough that the application can evolve without every new feature creating architectural problems.

I've documented the complete approach here: https://www.anujbansaldev.in/blog/building-production-ready-web-application-2026