Optimize Page Load Speed with Lazy Loading Images in Angular 15

Lazy loading images is a technique that helps to optimize the performance of a website by deferring the loading of images until they are needed. This can significantly improve the page load time, especially for websites with many images. In this article, we will be discussing how to implement lazy loading of images in an Angular 15 application using the ng-lazyload-image plugin.

ng-lazyload-image is a popular and highly-rated Angular library that makes it easy to implement lazy loading of images. It uses IntersectionObserver, a native API for detecting when an element enters or exits the viewport, to determine when to load images. This approach is much more efficient than using the traditional scroll or resize event-based approaches, which can negatively impact the performance of a website.

Getting started with ng-lazyload-image is simple. To install it, simply run the following command in your Angular project:

npm install ng-lazyload-image --save

Once installed, you can import the LazyLoadImageModule in your Angular module to make it available throughout your application:

import { LazyLoadImageModule } from 'ng-lazyload-image';

@NgModule({
  imports: [
    LazyLoadImageModule
  ]
})
export class AppModule { }

Next, you can use the lazyLoad directive in your templates to specify the images that should be lazy loaded:

<img [lazyLoad]="imageUrl" [offset]="offset" [defaultImage]="defaultImage" [errorImage]="errorImage">

The lazyLoad directive takes several optional parameters:

• offset: The number of pixels before the image enters the viewport to start loading it.
• defaultImage: An image to display while the lazy-loaded image is loading.
• errorImage: An image to display if the lazy-loaded image fails to load.

By using ng-lazyload-image, you can significantly improve the performance of your Angular 15 application and provide a better user experience for your users. Give it a try today!

In conclusion, ng-lazyload-image is a simple and efficient way to implement lazy loading of images in an Angular 15 application. It's easy to install and use, and can have a significant impact on the performance of your website. Give it a try and see for yourself!