Site Performance, Image Management, Image effects, Images, Performance

Lazy Load for Joomla! PRO (JSLazyLoading) is a lightweight performance-oriented plugin for lazy loading and multi-serving of images, that is intended for client-side optimization. Written in pure JavaScript, the plugin does not depend on third-party libraries, such as jQuery. The plugin delays the loading of images that are outside the viewport until a user scrolls to their position in the document. It can work with AJAX navigation and dynamic modules, such as sliders and carousels (hidden images are not loaded until their visibility status changes). The multi-serving option allows to display images dinamically, according to the device screen width or the device screen density. Retina mode is intended to display high-density images if the device screen density is high enough.

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In the retina mode, high-quality images are loaded on demand without waiting of entire page load. In contrast, if you want to speed up your site to the maximum and you do not need Retina support, you can set smaller light-weight images to be displayed in mobiles and tablets instead of large images.

This plugin can reduce network traffic and increase page load speed, which is very helpful if a user has slow internet connection. Different client-side and server-side options allow you to optimize the performance and usability of your website. The plugin is compatible with both modern and older browsers, including Internet Explorer 6+.

Highly customizable plugin contains a lot of features that will improve the performance of your website.

JSLazyLoading — это плагин для отложенной загрузки и мультивывода изображений (lazy load), предназначенный для оптимизации клиентской производительности. Плагин работает на чистом JavaScript и не зависит от внешних библиотек, таких как jQuery. Принцип отложенной загрузки заключается в том, что при отрисовке страницы загружаются только те изображения, которые находятся в области видимости браузера. Изображения не загружаются до тех пор, пока пользователь не пролистает страницу до места их видимого нахождения в документе. С помощью опции мультивывода вы можете динамически выводить Retina изображения или, наоборот, выводить уменьшенные, облегчённые изображения для мобильных устройств. Плагин работает с AJAX навигацией и динамическими модулями типа слайдеров и каруселей: скрытые изображения не загружаются до тех пор, пока их статус видимости не изменится.

Режим Retina позволяет загружать «тяжёлые» изображения по мере необходимости, при этом скорость загрузки страницы не будет зависеть от готовности загрузки изображений. Это может значительно ускорить работу вашего сайта, особенно при медленном интернет-соединении, и сделать удобной загрузку изображений высокого качества на экранах Retina. Если же вам необходимо максимальное ускорение, то плагин может работать в ином режиме, при котором пользователю мобильных устройств будут выводиться уменьшенные, «облегчённые» аналоги изображений.

Различные клиентские и серверные опции плагина позволят вам оптимизировать производительность вашего сайта. Плагин поддерживается большинством современных и старых браузеров, включая Internet Explorer 6+, совместим с AJAX навигацией и сторонними расширениями.

JSLazyLoading PRO est un plugin destiné à optimiser le chargement des images côté client (chargement paresseux) et la multi-distribution d'images. Écrit en JavaScript pur, le plugin n'utilise pas de librairies tierces, telles que jQuery. Il reporte le chargement des images qui ne sont pas encore affichées sur la page jusqu'à ce que l'utilisateur la fasse défiler pour les faire apparaître.

L'option multi-serving (multi-distribution) permet d'afficher des images de façon dynamique, en fonction de la largeur ou de la résolution de l'écran.
Le mode Retina permet d'afficher des images en haute définition si la résolution de l'écran est suffisamment élevée. Dans ce mode, les images en haute définition sont chargées à la volée sans qu'il soit nécessaire que la page soit chargée entièrement. En revanche, si vous voulez accélérer votre site encore plus et que vous n'avez pas besoin du support de Retina, vous pouvez définir des images plus petites et plus légères destinées à être affichées sur mobiles et tablettes au lieu d'images de grandes tailles.

Ce plugin permet de réduire le trafic réseau et d'augmenter la vitesse de chargement de votre site, c'est utile si un utilisateur dispose d'une connexion Internet lente. Des réglages d'options côté client et côté serveur permettent d'optimiser les performances et d'ergonomie de votre site Web. Le plug-in est compatible avec les navigateurs modernes et plus, y compris Internet Explorer 6+.


Posted on 31 January 2019
This plugin does FAR more than advertised, and is the only one (in my experience) that offers client & server side options.
Ease of use
Well thought-out. Very easy to use.
Every option on every panel has extensive information explaining what each one does.
Value for money
I used this to: Lazy loading images on a cafe website with tons of items. This plugin alone literally took our lighthouse score from 78% to 96% in 1 minute.
Owner's reply: Thank you for your review! This encourages me to maintain and develop this extension!
Do exactly what the developper says: load images when scroll down a page.
Ease of use
Just install the plugin. I did not set up anything. Works perfectly in default mode.
Great support even before purchasing the plugin. Very reactive and clear.
Very complete.
Value for money
Great. I tried for days JCHoptmize but it does work well with IE.
I used this to: I use the plugin to speed up my website which uses a lot of images and RAXO. This plugin is the only one that works correctly with RAXO.
Owner's reply: Thank you for your review! This encourages me to maintain and develop this extension!
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Philip Sorokin
Last updated:
Dec 25 2017
Date added:
Jun 09 2015
GPLv2 or later
Paid download

Uses Joomla! Update System


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