What is Lazy Load? Let’s Know How to Apply Lazy Load on the Website

One way to speed up website loading is to apply Lazy Load. What is Lazy Load? Image is a very important content on the website, the better the image quality, the bigger the size. This makes the page size bigger, so the page load takes longer. To overcome this, namely by utilizing Lazy Load.

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

Well, this article will discuss what lazy load is and techniques or how to apply lazy load on websites to get better performance. Let’s see the information!

What is Lazy Load?

Lazy Load is a technique to make the loading of images on a website asynchronous, meaning that once the top content is fully loaded, the images will not load.

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

Lazy Load works by loading the images only if the user has scrolled to the location where the images will be visible in the viewport, Otherwise the images will never load.

As an example, Pexels is one of the best quality free image download websites. If you don’t 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
Example of Lazy Load on Image Download Website

If you look at the image above, only some of the images are loaded properly, some of the images are not loading. So that’s what Lazy load says. That way the website is accessed more quickly and saves bandwidth and resources.

Why You Should Use Lazy Load

Lazy load gives you many benefits, therefore you should start considering implementing lazy load on your website. So, here are some reasons why you should use lazy load on your website.

  • Because images are only loaded when they are visible in the viewport, the website will choose to load faster. In addition, by implementing lazy load, you can save more bandwidth and server resources.
  • Because lazy loading makes image loading asynchronous, it can make the difference between users staying on or leaving the website.
  • If your website uses JavaScript to display content or provide some kind of functionality to users, loading the DOM quickly is essential. Most scripts wait until the DOM load is complete before starting to run. With Lazy load it makes loading faster.
  • Improving User Experience, By implementing lazy loading on the website, it can indirectly improve the user experience. For users who access the Website on a mobile device and the connection is slow, the lazy load is very helpful.

How to Apply Lazy Load on a Website

There are several techniques for implementing lazy loading on websites, so here’s how to use lazy loading on websites.

1. Native Lazy Load

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


If you look at the code above, there isn’t a single javascript in it to implement lazy loading. Attribute Loading gives us the option to delay loading of offscreen images and iframes until the user scrolls to the image.

Loading can take one of these three values:

  • lazy: Works great for Lazy Load
  • Eager: Instructs the browser to load the specified content immediately
  • Auto: Leave options for Lazy Load or not to browser.

This is the best way to implement lazy load, It will have no overhead, clean and simple. However, most browsers support the attribute Loading.

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 the 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 any dependencies. You can use this library to lazy load images, videos, iframes, and more, and it uses the Intersection Observer API.

If you’re just looking for a lazy load implementation that’s fast and applicable to a wide variety of content types, Lozad.js is the best solution. However you should be aware of browser support to start integrating this library with polyfills for the Intersection Observer API.

3. Lazy Loading with Blurred Image Effect

One of the lazy load techniques is by doing a 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 minify JavaScript
  • Support for retina screens
  • Dependency-free: no jQuery or other libraries and frameworks required
  • Progressively improved to prevent older browsers and failing JavaScript

4. Lazy Load WordPress Plugin

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

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

  1. A3 Lazy Load
  2. WP Rocket
  3. BJ Lazy Load
  4. Etc

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

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