Lazy loading: The Term used to describe an image or other part of a website or app that only loads as the user gets to it.

So, let’s say, any image that is 500px or a single scroll from the bottom of the viewport can be loaded up front as well. This is another mistake the developers often commit – lazy load all the images on the page. As mentioned earlier, with lazy loading, if the image is not visible, it never gets loaded.

A bit more difficult as it requires JavaScript skills and experience with APIs. The three ways to manually fix the “Defer offscreen images” warning. A common suggestion in Google’s PageSpeed Insights is to “Defer offscreen images”.

In this example, the increase is small, since the components don’t contain much code. But, as you fill the components with logic, this file size will increase, making a strong case for lazy loading. Since images out of the viewport are not downloaded immediately, lazy loading conserves extra bandwidth usage.

Benefits Of Lazy Loading Offscreen Images

This is sent by the client, allowing the server to deliver an image format that is a best-fit for the user. While great for looking at opportunities to improve your user-experience, always try to consult real-world data for a complete picture of what actual users are seeing. You may not think about images as part of your web dev work, but they can affect your web app’s performance more than any other part of your code. Since eCommerce websites are usually much heavier than others, optimization remains in the greatest need.

• Implementing lazy loading curtails primary load time as this enhances a website or an internet domain by minimizing the page weight, allowing for a faster page load time.
• First Input Delay is a Core Web Vitals metric that captures a user’s first impression of a site’s interactivity and responsiveness.
• Eager – loading the assets as soon as the page loads, irrespective of where they are placed on the page, whether above or below the page fold.
• Real user monitoring is a solution that assists you to obtain full-stack visibility on the poor-performing front-end code of your website.

Lazy Load plugin by WP RocketThis plugin works on thumbnails, all images in a post content or in a widget text, avatars and smilies. The big advantage to this plugin is there are no JavaScript libraries such as jQuery being used and the script weighs less than 10 KB. There are no options to configure, simply install the plugin and lazy loading will simply work. For comparison, let’s also create an eagerly loaded module and see how it impacts the file size and load time.

Lozad.js, an open-source library based on Intersection Observer, can lazy-load media with both dynamic and static elements. You can easily add the library to your JS files with no dependencies. You can implement lazy loading in JavaScript with the native Intersection Observer API or with lazy-loading libraries, such as Lozad and Yall. In today’s digital-first age, online site performance is critical for ensuring business continuity, attracting repeat sales, and gaining a competitive advantage.

Create A Feature Module With Routes

Other CMS platforms offer plugins/modules/extensions for the same purpose. There are no strict guidelines for what pages need lazy loading, but you can test your site’s performance and user engagement with and without lazy loading to make this call.

• The home page is the main page of the website, which is the first page that users see when they enter the website.
• React.lazy is a powerful feature of React that allows components to be loaded lazily from the server.
• This is very easy to implement using a Lazysizes plugin called Blur-Up.
• The article Lazy Loading for Optimal Performance tells you why lazy loading is useful, how it works, when to apply it, and how to get started.

Cloudinary is a cloud-based service that simplifies and automates the process of manipulating, optimizing, and delivering images and videos, optimized for all devices at all bandwidths. With Cloudinary’s SDKs, which you can seamlessly integrate with your app, you can efficiently transform, optimize, and deliver media, largely through automation. Now that lazy loading works in all modern browsers, it’d be a smart move to lazy-load resources with the Cloudinary SDK’s image tag. That’s an approach through which you can prioritize content, delaying loads for less relevant or visible content. Consequently, your apps or websites load faster, delivering an enhanced user experience. This may seem complex at first, but this same behavior forms the basis of the technique for lazy loading background images.

There is a balance between delivering speed and maintaining a good user experience. In the next section we’ll see a few ideas and strategies to help with this.

The home page is the main page of the website, which is the first page that users see when they enter the website. The list page is the page that displays the list of blog articles. The detail page is the page that displays the content of the blog article.