Lazy Load [img]

Unmaintained Lazy Load [img] 1.3.1

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Compatible XF 1.x versions
  1. 1.4
  2. 1.5
Additional requirements
php 5.4+
Require Client Browsers to be at least IE9, Firefox or Chrome.
MIT Licence
Provides lazy loaded image support via the Lazysizes

A zero query method for per user-group lazy loading of the [img] and [attach] tags in threads and conversations with adjustable distance before images are loaded.

Uses a noscript tag around the original img tag.


Option to force lazy loading of contents in a spoiler tag.


Adds the permission:
  • Enable Lazy Load Images
For "Forum Permissions" and "Conversation Permissions" sections.


  • Enable Outside threads/Conversations
    • permits the lazy loading bbcode injection to run outside of those contexts. Inside those context it will still respect permissions.
  • Force Lazy Loaded Spoiler

Unveil effects
Add styling to your theme for the classes: lazyload, lazyloading, lazyloaded.

Fade in
/* fade image in after load */
.lazyloading {
    opacity: 0;
.lazyloaded {
    opacity: 1;
    transition: opacity 300ms;

/* fade image in while loading and show a spinner as background image (good for progressive images) */

.lazyload {
    opacity: 0;

.lazyloading {
    opacity: 1;
    transition: opacity 300ms;
    background: #f7f7f7 url(loader.gif) no-repeat center;

Known issues:
  • Doesn't work with Resource Manager.


Lazysizes is MIT Licensed, as of 2018-05-09.
Original source is, mirrored;


I recommend using Add-on install & upgrade to install this add-on.

Contributing features or bug fixes
Please create a Github Pull request via the "More Information" link.


If you appreciate this addon, please consider a contribution via PayPal. Details will be provide via private conversation.

Please contact me if you wish for different licencing arrangements.
First release
Last update


5.00 star(s) 3 ratings

More resources from Xon

Latest updates

  1. 1.3.1 - Bugfix update

    Upgrade note; delete js/SV/LazyImageLoader folder (case sensitive!) before uploading new...
  2. 1.3.0 - Maintenance update

    Upgrade note; delete js/SV/LazyImageLoader folder before uploading new contents. Change js...
  3. 1.2.4 - Bugfix update

    Fix bug where image thumbnails are not displayed at correct dimensions Thanks @Ralle

Latest reviews

Been running this for several weeks, and have had 0 complaints which is quite remarkable on a board our size. Image-heavy threads load faster, and images load as needed instead of all at once. Admin options make addon very flexible. Thanks Xon!
Its help me out for better website load. now website is bit fatsre for load because of images my website was slow.
Fantastic addon. Invaluable on my photography forums (very image heavy), especially for mobile. Thanks, Xon!
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