How Lazy Loading And Code Splitting Work In Angular Framework

In today’s fast-paced development world, performance and scalability are crucial. At the best software training institute in Hyderabad, we emphasize not just learning Angular, but also mastering performance-enhancing techniques like lazy loading and code splittingBy reducing loading time and improving user experience, these features optimize Angular applications. Let’s explore how they work and how to implement them step by step.

🔹 What is Lazy Loading in Angular?
Lazy loading is a design pattern that delays the loading of modules until they are needed. Instead of loading the entire application at once, Angular loads specific modules only when a user navigates to their corresponding route. By doing this, you reduce your app's initial bundle size and speed up its loading time.

🔹 What is Code Splitting?
Code splitting is the process of dividing your application code into smaller pieces. These chunks are loaded dynamically based on user interaction. Angular uses the Web pack bundler to split code behind the scenes. Lazy loading is one of the primary ways Angular achieves code splitting automatically.

🔹 Step-by-Step Guide to Implement Lazy Loading
✅ Step 1: Create Feature Modules
Use Angular CLI to create feature modules:

ng generate module user --route user --module app.module
This command sets up the routing automatically and marks the user module for lazy loading.

✅ Step 2: Lazy loading routes are configured
Open your app-routing.module.ts and configure the route:

typescript

const routes: Routes = [
{
path: 'users',
loadChildren: () => import('./users/user.module').then(m => m.UserModule)
}
];
This line tells Angular to load the UserModule only when /users route is accessed.

✅ Step 3: Verify Module Routing
Inside users/user.module.ts, ensure you have a routing module set up with the correct components and paths:

typescript

const routes: Routes = [
{ path: '', component: UserListComponent }
];
✅ Step 4: Test Lazy Loading
Run your app and open Chrome DevTools → Network tab. Navigate to the /users route and observe that Angular loads the related chunk only when needed.

🔹Code splitting and lazy loading benefits
🚀 Faster Initial Load: Only essential modules are loaded first.

🔁 Efficient Resource Use: Reduces bandwidth and memory usage.

📈 Scalable Architecture: Easy to manage larger applications by dividing features into modules.

🔹 Common Mistakes to Avoid
Not creating a separate routing module within feature modules.

Forgetting to remove eager imports from app.module.ts.

Errors caused by misconfigured lazy routes.

🔹 Conclusion
By implementing lazy loading and code splitting, Angular developers can significantly enhance the performance of their applications. These techniques are especially important for large-scale enterprise apps. If you’re looking to master these skills under expert guidance, Monopoly IT Solutions is here to help. As a leading name in software training, we provide hands-on learning experiences and real-time project implementation.

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