Tillitsdone
down Scroll to discover

Code Splitting & Lazy Loading in React for Speed

Learn how to optimize your React applications with code splitting and lazy loading techniques.

Discover best practices for improving load times and enhancing user experience.
thumbnail

Code Splitting and Lazy Loading in React for Faster Load Times

A futuristic abstract network of glowing nodes and connections spreading across a dark space with bright pink and zinc metallic colors interweaving in geometric patterns ultra-realistic cinematic 8K UHD high resolution sharp and detailed

In today’s world of web applications, performance is everything. Users expect lightning-fast load times, and if your React app takes too long to load, they might just bounce. That’s where code splitting and lazy loading come in - they’re like your secret weapons for creating blazingly fast React applications.

Understanding the Problem

Remember the days when we used to bundle our entire React application into one massive JavaScript file? Yeah, that wasn’t great. Your users had to download everything upfront, even if they only needed to see the home page. It’s like ordering the entire menu when you just want a coffee!

Abstract geometric pattern showing a gradient transition from bright natural green to pink featuring interconnected hexagonal shapes floating in space high-quality ultra-realistic cinematic 8K UHD high resolution sharp and detailed

Enter Code Splitting

Code splitting is pretty straightforward - it’s about breaking your app into smaller chunks that load on demand. Instead of serving a huge feast all at once, you’re delivering smaller, more manageable portions exactly when they’re needed.

Here’s how you can implement it:

import { lazy, Suspense } from 'react';
// Instead of this:
// import HeavyComponent from './HeavyComponent';
// Do this:
const HeavyComponent = lazy(() => import('./HeavyComponent'));
function App() {
return (
<Suspense fallback={<div>Loading...</div>}>
<HeavyComponent />
</Suspense>
);
}

Best Practices for Implementation

  1. Route-Based Splitting: Start with your routes. Each page can be its own chunk.
  2. Component-Based Splitting: Large components that aren’t immediately visible (like modals or complex forms) are perfect candidates.
  3. Strategic Loading: Think about user behavior and split accordingly.

A serene abstract landscape with floating geometric shapes in bright zinc and pink colors against a gradient sky featuring crystalline structures and smooth curves high-quality ultra-realistic cinematic 8K UHD high resolution sharp and detailed

Real-World Tips

  • Use React.lazy() for component-level code splitting
  • Implement loading states wisely
  • Consider preloading critical routes
  • Monitor your bundle sizes using tools like webpack-bundle-analyzer
  • Test on slow networks to ensure good user experience

Remember, code splitting isn’t about splitting everything - it’s about finding the right balance. Split too much, and you’ll have too many network requests. Split too little, and you’re back to square one.

Abstract flowing waves of energy in bright pink and natural green colors intertwining in a cosmic space setting with geometric elements high-quality ultra-realistic cinematic 8K UHD high resolution sharp and detailed

Conclusion

Code splitting and lazy loading are powerful tools in your React optimization toolkit. When implemented thoughtfully, they can dramatically improve your application’s initial load time and overall performance. Start small, measure the impact, and scale your implementation based on real user data.

Remember: the goal isn’t to have the most code splits - it’s to create the best possible experience for your users.

icons/logo-tid.svg Latest Blogs
Discover our top articles, selected to support the growth of your business.
https://imgproxy-landing-page.tillitsdone.com/sig/rs:fit:1200:630/plain/https%3A%2F%2Fcms-r2.tillitsdone.com%2Fwp-content-prod%2Fuploads%2F2025%2F10%2FTill-its-done_SEO_R38_Sep_1440x697.jpg@webp TypeScript Interface คืออะไร? อธิบายพร้อมวิธีใช้และข้อแตกต่างจาก Type เรียนรู้วิธีใช้ TypeScript Interface เพื่อสร้างโครงสร้างข้อมูลที่ปลอดภัยและเข้าใจง่าย พร้อมเปรียบเทียบข้อดีข้อแตกต่างกับ Type ที่คุณต้องรู้ ถูกรวมเอาไว้ในบทความนี้แล้ว https://imgproxy-landing-page.tillitsdone.com/sig/rs:fit:1200:630/plain/https%3A%2F%2Fcms-r2.tillitsdone.com%2Fwp-content-prod%2Fuploads%2F2025%2F10%2FTill-its-done_SEO_R37_Sep_1440x697.jpg@webp วิธีใช้งาน Material-UI (MUI) กับ React โปรเจกต์ พร้อมตัวอย่างโค้ด เรียนรู้วิธีใช้งาน Material-UI กับ React อย่างง่าย พร้อมตัวอย่างโค้ดที่จะเสริมสร้างความเข้าใจในการใช้งาน Material-UI กับ React ให้มากยิ่งขึ้นไปกว่าเก่า https://imgproxy-landing-page.tillitsdone.com/sig/rs:fit:1200:630/plain/https%3A%2F%2Fcms-r2.tillitsdone.com%2Fwp-content-prod%2Fuploads%2F2025%2F09%2FTill-its-done_SEO_R36_Sep_1440x697.jpg@webp Material-UI (MUI) คืออะไร อยากสร้าง UI สวยงามและเป็นมืออาชีพในเวลาอันรวดเร็วใช่ไหม มาทำความรู้จักกับ Material-UI (MUI) ที่ช่วยให้คุณพัฒนาแอปพลิเคชันบน React ได้ง่ายและดูดีในทุกอุปกรณ์ https://imgproxy-landing-page.tillitsdone.com/sig/rs:fit:1200:630/plain/https%3A%2F%2Fcms-r2.tillitsdone.com%2Fwp-content-prod%2Fuploads%2F2025%2F09%2FTill-its-done_SEO_R35_Sep_1440x697.jpg@webp มือใหม่อยากเริ่มเขียนแอป ต้องใช้โปรแกรมและภาษาอะไรบ้าง? อยากเป็นนักพัฒนาแอปแต่ไม่รู้จะเริ่มยังไง พบกับแนวทางการเลือกเครื่องมือและภาษาเบื้องต้นพร้อมคำแนะ เพื่อก้าวสู่เส้นทางการเขียนแอปอย่างมั่นใจในบทความนี้ https://imgproxy-landing-page.tillitsdone.com/sig/rs:fit:1200:630/plain/https%3A%2F%2Fcms-r2.tillitsdone.com%2Fwp-content-prod%2Fuploads%2F2025%2F09%2FTill-its-done_SEO_R27_Sep_1440x697.jpg@webp เปรียบเทียบ 3 วิธีติดตั้ง install node js บน Ubuntu: NVM vs NodeSource vs Official Repo แบบไหนดีที่สุด? เรียนรู้วิธีติดตั้ง Node.js บน Ubuntu ด้วย NVM, NodeSource หรือ Official Repo เลือกวิธีที่เหมาะกับความต้องการของคุณ พร้อมเปรียบเทียบ เพื่อการพัฒนาที่มีประสิทธิภาพ! https://imgproxy-landing-page.tillitsdone.com/sig/rs:fit:1200:630/plain/https%3A%2F%2Fcms-r2.tillitsdone.com%2Fwp-content-prod%2Fuploads%2F2025%2F09%2FTill-its-done_SEO_R26_Sep_1440x697.jpg@webp Next js image การ Optimization รูปภาพแบบ Native ที่มีประสิทธิภาพสูง เรียนรู้วิธีใช้ Next.js Image เพื่อ Optimization การแสดงภาพบนเว็บไซต์ ด้วยเทคนิคบีบอัด ปรับขนาด Lazy Load และรองรับ Responsive ช่วยให้เว็บคุณโหลดเร็วขึ้นแน่นอน!
icons/logo-tid.svg

Talk with CEO

Ready to bring your web/app to life or boost your team with expert Thai developers?
Contact us today to discuss your needs, and let’s create tailored solutions to achieve your goals. We’re here to help at every step!
🖐️ Contact us
down Explore our best articles, cover a wide variety of technologies
Our knowledge base
196 Articles
Explore right
icons/logo-react.svg ReactJs
Popular JavaScript library for building user interfaces with a component-based architecture.
160 Articles
Explore right
icons/flutter.svg Flutter
UI toolkit for building natively compiled applications for mobile, web, and desktop from a single codebase.
144 Articles
Explore right
icons/logo-nodejs.svg Nodejs
JavaScript runtime for building scalable, high-performance server-side applications.
58 Articles
Explore right
icons/next-js.svg Nextjs
React framework enabling server-side rendering and static site generation for optimized performance.
38 Articles
Explore right
icons/tailwind.svg TailwindCSS
Utility-first CSS framework for rapid UI development.
36 Articles
Explore right
icons/code-outline.svg Typescript
Superset of JavaScript adding static types for improved code quality and maintainability.
126 Articles
Explore right
icons/code-outline.svg Golang
Programming language known for its simplicity, concurrency model, and performance.
67 Articles
Explore right
icons/code-outline.svg AstroJs
Astro is an all-in-one web framework. It includes everything you need to create a website, built-in.
38 Articles
Explore right
icons/code-outline.svg Jest
Versatile testing framework for JavaScript applications supporting various test types.
13 Articles
Explore right
icons/code-outline.svg Website development th
10 Articles
Explore right
icons/code-outline.svg Mobile application th
5 Articles
Explore right
icons/code-outline.svg Reactjs th
3 Articles
Explore right
icons/code-outline.svg Flutter th
3 Articles
Explore right
icons/code-outline.svg Nextjs th
1 Articles
Explore right
icons/code-outline.svg Software house th
1 Articles
Explore right
icons/code-outline.svg Nodejs th
1 Articles
Explore right
icons/code-outline.svg Typescript th
337 Articles
Explore right
icons/css-4.svg CSS
CSS3 is the latest version of Cascading Style Sheets, offering advanced styling features like animations, transitions, shadows, gradients, and responsive design.
Let's keep in Touch
Thank you for your interest in Tillitsdone! Whether you have a question about our services, want to discuss a potential project, or simply want to say hello, we're here and ready to assist you.
We'll be right here with you every step of the way.
Contact Information
rick@tillitsdone.com+66824564755
Find All the Ways to Get in Touch with Tillitsdone - We're Just a Click, Call, or Message Away. We'll Be Right Here, Ready to Respond and Start a Conversation About Your Needs.
Address
9 Phahonyothin Rd, Khlong Nueng, Khlong Luang District, Pathum Thani, Bangkok Thailand
Visit Tillitsdone at Our Physical Location - We'd Love to Welcome You to Our Creative Space. We'll Be Right Here, Ready to Show You Around and Discuss Your Ideas in Person.
Social media
FacebookInstagramLinkedIn
Connect with Tillitsdone on Various Social Platforms - Stay Updated and Engage with Our Latest Projects and Insights. We'll Be Right Here, Sharing Our Journey and Ready to Interact with You.
We anticipate your communication and look forward to discussing how we can contribute to your business's success.
We'll be here, prepared to commence this promising collaboration.
Frequently Asked Questions
Explore frequently asked questions about our products and services.
Whether you're curious about features, warranties, or shopping policies, we provide comprehensive answers to assist you.