A Guide to Lazy Loading in Angular 8

Introduction:

In modern web development, performance and user experience are key factors in creating successful applications. As applications grow in size and complexity, it becomes crucial to optimize loading times and improve the overall user experience. One effective technique for achieving this in is lazy loading. In this guide, we'll explore what lazy loading is, how it works in Angular 8, and how you can implement it to enhance your application's performance.

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Lazy loading is a technique that allows you to load specific parts of your application on-demand, rather than loading everything at once when the application initializes. This means that modules, components, and resources are loaded only when they are needed, resulting in faster initial page loads and improved performance.

How does Lazy Loading work in Angular 8?

Angular 8 introduces the concept of lazy loading through the use of Angular routing. With lazy loading, you can define separate modules for different parts of your application and load them asynchronously when requested. This way, the initial bundle size can be reduced, resulting in faster loading times.

Implementation Steps:

Set up your routing module:

Start by creating a separate routing module for the module or feature you want to lazy load. This module should import the required components and define the routes for those components.

Configure lazy loading in your main routing module:

In your main app routing module, configure the routes for lazy loading. Instead of importing the module directly, you specify the path and the loadChildren property with the path to the lazy-loaded module. uses this information to load the module dynamically when needed.

Create the lazy-loaded module:

Next, create a separate module for the feature or section you want to lazy load. This module should import the required components, services, and any other dependencies. Make sure to configure the routes for the components within this module as well.

Update your components and templates:

Once your lazy-loaded module is set up, you can update your components and templates to utilize the lazy-loaded routes. This typically involves updating your links and navigation to point to the lazy-loaded routes instead of the eagerly loaded ones.

Benefits of Lazy Loading:

Improved performance:

By loading only the necessary modules and components when needed, lazy loading reduces the initial loading time and improves the overall performance of your Angular application.

Better user experience:

With lazy loading, users can start interacting with the application faster, as only the essential components are loaded initially. Subsequent components are loaded seamlessly in the background as the user navigates through the application.

Smaller initial bundle size:

Lazy loading allows you to split your application into smaller, manageable modules. This results in a smaller initial bundle size, which is particularly beneficial for applications with large codebases.

Conclusion:

Lazy loading is a powerful technique in that can significantly enhance the performance and user experience of your applications. By selectively loading modules and components on-demand, you can reduce initial loading times, improve resource management, and create a smoother, more responsive application. With the step-by-step implementation guide provided in this blog, you have all the information you need to start implementing lazy loading in your Angular 8 projects. Give it a try and watch your application's performance soar!