Lazy loading makes your site load faster and saves bandwidth. Uses jQuery and degrades gracefully for non-js users. Works with both images and iframes
FAQ
Installation Instructions
- Download and unzip plugin
- Upload the ‘bj-lazy-load’ folder to the ‘/wp-content/plugins/’ directory,
- Activate the plugin through the ‘Plugins’ menu in WordPress.
Whoa, this plugin is using JavaScript. What about visitors without JS?
No worries. They get the original element in a noscript element. No Lazy Loading for them, though.
I’m using a CDN. Will this plugin interfere?
Lazy loading works just fine. The images will still load from your CDN.
How can I verify that the plugin is working?
Check your HTML source or see the magic at work in Web Inspector, FireBug or similar.
ChangeLog
Version 1.0.9
- Do not generate tiny image size if unless low-res preview image is used
- Default placeholder image transparency fix
- Lazy load image sizes attribute to avoid w3c validation error
- Change activation order of src and srcset to avoid loading both original and responsive version of image (by Lucian Florian)
Version 1.0.8
- Skip classes regex fix
- Amp compatibility (by mustafauysal)
Version 1.0.7
- Update sponsored by Bonnier Tidskrifter
- Fixed issue with srcset not lazy loading (by krispy1298)
- Compatibility with BadgeOS plugin (by rohitmanglik)
- WP’s theme style for submit button. (by odie2)
- Images will now get the lazy-loaded class onload
- Added optional rudimentary LQIP solution
- Added working regex for selecting elements to skip
Version 1.0.6
- Fixed bug when multiple iframes was on the same line of HTML code
Version 1.0.5
- Added Polish language (by Maciej Gryniuk).
- Remove leftover console.log() from debugging — oh, crap … I know 🙁
Version 1.0.4
- We do not touch the feeds
Version 1.0.3
- Fixed issue where some images wouldn’t be loaded on load under certain conditions.
- Small performance improvement
Version 1.0.2
- PHP 5.2 compatibility again
Version 1.0.1
- Fixes issue with missing placeholder
Version 1.0
- Internal rewrite. Code cleanup.
- Supports 3rd party filters
- Supports most infinite scroll (or content lazy loading) plugins (all that triggers post-load)
- No more TimThumb
- No more dependant on 3rd party JS, not even jQuery
- Removed custom responsice/hidpi image handling in favour of compatibility with the RICG Responsive Images plugin
- Added translations to Hebrew (he_IL) by Imri Sagive
Version 0.7.5
- Also applies to text widgets (Thanks to Sigurður Guðbrandsson)
Version 0.7.4
- Skips lazy loading of data-URIs
Version 0.7.3
- Works with newlines in the HTML string for the IMG element
Version 0.7.2
- Re-minified the combined js file for better compability with faulty minifiers
Version 0.7.1
- Proper encoding of non-ASCII characters in filenames when using responsive or hiDPI images (thanks @testsiteoop)
Version 0.7.0
- Added meta box to all public post types to exclude BJ Lazy Load for individual posts/pages
- Placeholder image is replaced with a really short data-uri (thanks @jruizcantero)
- Added a proper WordPress filter method for arbitrary HTML filtering with: apply_filters( ‘bj_lazy_load_html’, $html )
- Updated scbFramework to release 58 (no more strict warnings in admin)
- Updated jQuery.sonar to latest version (as of 2013-11-13)
- Added POT file (Go translate!)
- Added translation to Norwegian Bokmål (nb_NO)
- Added translation to Russian (ru_RU) by Elvisrk
Version 0.6.10
- Responsive and HiDPI images works with MultiSite subfolders
- Lazy loading is disabled on Opera Mini
- Removed leftin print_filters_for() function (sry)
- User definable threshold
Version 0.6.9
- Bugfix: Single quotes for the class attribute is now handled (thanks @kReEsTaL)
- Bugfix: Removed strict error notice (thanks syndrael)
Version 0.6.8
- Bugfix: sonar.js wouldn’t load properly when SCRIPT_DEBUG was set to true (thanks @techawakening)
Version 0.6.7
- Combined JS files for faster loading
- Bugfix for when viewport is resized – now triggering scroll event (thanks @kReEsTaL)
Version 0.6.6
- Option to disable BJ Lazy Load for MobilePress
Version 0.6.5
- Iframe lazy loading is now compatible with Gravity Forms’ ajax forms.
Version 0.6.4
- Disable when viewing printable page from WP-Print
Version 0.6.3
- Detects WPTouch Pro as well
Version 0.6.2
- Bugfix: Remove notice of undefined constant when SCRIPT_DEBUG isn’t defined
Version 0.6.1
- Bugfix: The infinite_scroll option wasn’t initialized
Version 0.6.0
- Optionally serving size optimized images for responsive design/adaptive layout
- Optionally serving hiDPI images (retina support)
- Option to disable BJ Lazy Load for WPTouch
- Fixed issue with infinite scroll (must be enabled on options screen)
- Upgraded jQuery.sonar to latest version
Version 0.5.4
- Possible to skip lazy loading of certain images with specified classnames
- Made the placeholder image override an option setting in wp-admin
Version 0.5.3
- Added filter: bj_lazy_load_placeholder_url – override placeholder image (should be an option setting in the future)
Version 0.5.2
Version 0.5.1
- Lowered jQuery version dependency
- New options: More granular control on what content to lazy load
Version 0.5.0
- Complete rewrite
- Replaced JAIL with jQuery.sonar to accomodate for iframe lazy loading
- Added lazy loading for iframes
- The manual filter code now works as it should, lazy loading all images instead of just the first.
Version 0.4.0
- Upgraded JAIL to version 0.9.9, fixing some bugs. Note: data-href is now renamed data-src.
Version 0.3.3
- Replaced an anonymous function call causing error in PHP < 5.3
Version 0.3.2
- The wp_head caller selector was added to the option page
Version 0.3.1
- Also with d.sturm’s fix (thanks)
Version 0.3.0
- Added BJLL::filter() so you can lazy load any images in your theme
- Added the option to load in wp_head() instead (suboptimal, but some themes actually don’t call wp_footer())
- Correctly removed the lazy loader from feeds
Version 0.2.5
- Fixes Unicode-issue with filenames
Version 0.2.4
- Now (more) compliant to the WP coding style guidelines.
- All strings localized
- Translations get loaded
- POT file included (send me your translations)
- Norwegian translation included
Version 0.2.3
- Now using DOMDocument for better HTML parsing. Old regexp parsing as fallback if DOMDocument is not available.
Version 0.2.2
- Added CSS. No longer need for hiding .no-js .lazy
- Added options whether to include JS and CSS or not
Version 0.2.1
- Added options: Timeout, effect, speed, event, offset, ignoreHiddenImages
- Combining the two JS files for faster loading
- Renamed the plugin file from bj-lazyload.php to bj-lazy-load.php to better fit with the plugin name
Version 0.2
- Added options panel in admin
- Added option to lazy load post thumbnails
- Skipped the lazy loading in feeds
Version 0.1
- Released 2011-12-05
- It works (or at least it does for me)
