What is Lazy Load? Let's Know How to Apply Lazy Load on a Website

What is Lazy Load? Let's Know How to Apply Lazy Load on a Website



One way to speed up website loading is by implementing Lazy Load, What is Lazy Load? The image is a very important content on the website, the better the quality of the image, the greater the size. This makes the page size bigger, so the page load takes a long time. To overcome this, by using Lazy Load.

Lazy load becomes the most important part of a website, like it or not, if you want a website to have a faster load, you have to apply lazy load. But how do you apply it?

Now this article will discuss what is lazy load and techniques or how to apply lazy load on a website to get better performance. Let's see the information!

What is Lazy Load?

Lazy Load is a technique to make the image loading on the website out of sync, meaning that after the top content is fully loaded, then the image will not be loaded.

This can be said if the user does not scroll completely, then the image placed at the bottom of the page will not be loaded. So, the browser will not load images if the user does not scroll to the image.

Lazy Load works by loading images only if the user has scrolled to the location where the image will be seen in the viewport. If not, then the images will never be loaded.

For example, Pexels is one of the best quality free image download websites. If you do not use lazy load the website certainly has a very long page load time. To overcome this, Pexels applies lazy load on its website.
Lazy Load Example A Lazy Load Example on an Image Download Website


If you see the picture above, only some images are loaded properly, some images are not loaded. Now that's what Lazy loads, That way the website is more quickly accessed and saves bandwidth and resources.

Why You Should Use Lazy Load

Lazy load gives you many benefits, so you should start to consider implementing lazy load on the website. Now here are some reasons why you should use lazy load on the website.

  1. Because images are only loaded when seen in the viewport, the website will choose faster loading. In addition, by implementing lazy load, you can save more bandwidth and server resources.
  2. Because lazy load makes loading images out of sync, it can make a difference between users who remain or leave the website.
  3. If your website uses JavaScript to display content or provide some kind of functionality to users, loading the DOM quickly is very important. Most scripts wait until the DOM loading is complete before starting to run. With Lazy load, that makes loading even faster.
  4. Improve User Experience, by implementing lazy load on the website, it can indirectly improve user experience. For users who access the Website on mobile devices and slow connections, the existence of lazy load is very helpful.

How to Apply Lazy Load on a Website

There are several techniques for implementing lazy load on a website, so here's how to use lazy load on a website.

1. Native Lazy Load

The easiest way to implement lazy load is to use the Native Lazy load technique, this technique is enough to add markup or plain html code. You don't need to add javascript in this way.

    <img src = "image.jpg" loading = "lazy" alt = "..." />

    <iframe src = "content.html" loading = "lazy"> </iframe>

If you see the code above, there isn't a single javascript in it to implement lazy load. The Loading attribute gives us the option to delay loading images outside the screen and iframe until the user scrolls to the image.

Loading can take one of these three values:

  •     lazy: Works very well for Lazy Load
  •     Eager: Instruct the browser to load the specified content immediately
  •     Auto: Leave the option to Lazy Load or not to browser.

This method is the best way to implement lazy load, this will not have overhead, clean and simple. However, most browsers support the Loading attribute.

2. Lozad.js

An easy and fast way to use Lazy load is to use a library, the Javascript Library does most of the work to implement Lazy load on a website. One of the javascript libraries for Lazy load is Lozad.js.

Lozad is a lightweight lazy load library, and can be configured easily and in pure JavaScript without dependencies. You can use this library to apply lazy loads to images, videos, iframes, etc., and this library uses the Intersection Observer API.

If you are just looking for a lazy load implementation that is fast and applies to various types of content, Lozad.js is the best solution. But you should pay attention to browser support to start integrating this library with polyfill for the Intersection Observer API.

3. Lazy Loading with the Blurred Image Effect

One of the lazy load techniques is that by doing the blur effect on the image, you can apply lazy load with the blur technique in various ways. Well one of them is by using the method of Craig Bugler.

    Performance: only 463 bytes of CSS and 1,007 bytes of JavaScript JavaScript
    Support for retinal screens
    Dependency-free: no jQuery or other libraries and frameworks needed
    Progressively improved to ward off older browsers and JavaScript failing

4. WordPress Lazy Load Plugin

If you are a wordpress user, you can more easily implement lazy load. You just have to install the lazy load plugin and your website automatically has a lazy load feature when the plugin is active.

So here are some Lazy Load Plugins that you can use:

  •     A3 Lazy Load
  •     WP Rocket
  •     BJ Lazy Load
  •     Etc

Now that's information about what is lazy load, how important is lazy load for a website and how to implement a lazy load website. You can start implementing these features for better website performance.

You may like these posts