توضیحات
A simple plugin to enable lazy loading for all images using WordPress image functions, or embedded into posts and pages using the WordPress dashboard.
The plugin works by replacing the original image source with a blank transparent gif via datauri. Reducing page load speed, network requests, and saving bandwidth for host and visitors unless they scroll where an image is in view. The plugin makes use of the fantastic lazysizes javascript library.
نصب
This section describes how to install the plugin and get it working.
- Upload the plugin files to the
/wp-content/plugins/wp-lazy-loaded-images
directory, or install the plugin through the WordPress plugins screen directly. - Activate the plugin through the ‘Plugins’ screen in WordPress
- That’s it! It should automatically replace images used inside of posts / pages (where passed through properly in themes), plugins, and more.
سوالات متداول
- How can I change the default placeholder color?
-
As of 2.0.0, Images now load as a transparent gif, which should remove the need to add custom image colors, and make it work in more situations automatically.
- Fade in images as they load
-
With the new lazy load library, a few helper CSS classes are included by default. The full documentation can be found here, but the gist of it [pulled from the github repo] is as follows:
/* fade image in after load */ .lazyload, .lazyloading { opacity: 0; } .lazyloaded { opacity: 1; transition: opacity 300ms; }
- Fallback
-
As of 1.4.0, the plugin also adds support for a
noscript
fallback so the images will appear in browsers that might have Javascript disabled.To take full advantage of this, the plugin provides a fully automatic solution using the following filter to your
functions.php
,add_filter( 'lazy_load_enable_fallback', '__return_true' )
. This method will automatically handle all of the below instructions. If you’re developing a custom theme you might want to include the following instructions manually, in that case you can useadd_filter( 'lazy_load_enable_noscript', '__return_true' )
to only add the<noscript>
tags and leave the styles, javascript, and body classes untouched.NOTE: This fallback only works on the images that are replaced inside the body of the pages, and those generated by using
the_post_thumbnail
.Add the following CSS:
.no-js .lazyload.lazy-fallback { display: none; }
Add the following JS inside as close to the opening
body
tag as possible:<script type="text/javascript"> var body = document.getElementsByTagName('body')[0]; if (body != undefined) { body.setAttribute('class', body.getAttribute('class').replace('no-js', '')); } </script>
And append this snippet to your functions.php:
add_filter( 'body_class', function ( $classes, $class ) { if ( ! in_array( 'no-js', $classes ) ) { $classes[] = 'no-js'; } return $classes; }, 10, 2 );
نقد و بررسیها
توسعه دهندگان و همکاران
“WP Lazy Loaded Images” نرم افزار متن باز است. افراد زیر در این افزونه مشارکت کردهاند.
مشارکت کنندگانترجمه “WP Lazy Loaded Images” به زبان شما.
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گزارش تغییرات
2.0.1 – 2.0.5
- Fix appending of HTML & BODY tags from generated content
- Update lazysizes library
- Migrate all attributes previously on image to newly generated one(s)
2.0.0
- Change lazy-loading library to lazysizes
- Images & placeholder images are now generated as transparent gifs, removing the need for custom placeholder colors
1.4.0
- Added support for external images (or images that can’t be found inside of WP install) as long as height, width, and src attributes are set
- Add option for
noscript
fallback usinglazy_load_enable_fallback
filter. Disabled by default for compatibility. See FAQ for instructions. - Bugfix to catch errors better
1.3.2
- Add fix for UTF encoding
1.3.0
- Change
the_content
parser to a DOM parser to be a bit more accurate when replacing images, and better support for attributes (alt, title, classes) - Add support to disable lazy loading on a per-image basis by passing
data-no-lazy
on the image you don’t want loading inside the post/page content area - Added a few filters for developers / users
1.2.0
- Move script enqueue to footer
- Allow filter for custom placeholder color on a per-image basis
1.1
- Add support for automatically replacing images embedded inside posts and pages
1.0
- Initial Release