a3 Lazy Load的作者是a3rev Software,目前有200,000+个有效安装。已经Tested with 5.4.1版本的wordpress。

a3 Lazy Load is a Mobile Oriented, very simple to use plugin that will speed up sites page load speed. The more content heavy your site the better the plugin will perform and the more you will see the improvements in performance. See this demo of a page with 1,000 images (yes 1,000 images) to load.

a3 Lazy Load is inspired by and powered by the ressio Lazy-Load-xt JavaScript.

a3 Lazy Load is the most fully featured, incredibly easy to set up lazy load plugin for WordPress. Use the plugins admin settings to easily define what elements are lazy loaded and when they become visible in the users browser. As the user scrolls down the page the next lot of elements you have applied lazy Load to are only loaded as they become visible in the view port.


Images are the number one element that slows page load and increases bandwidth use. From the a3 Lazy Load admin panel turn load images by a3 Lazy Load ON | OFF. For more flexibility when ON you can choose to ON | OFF lazy load for images in

Post, Pages and Custom Post Types (All Content areas)
Widgets (Sidebar, header and footer)
Apply to post thumbnails
Apply to gravatars

Supports lazy loading of images in containers that use horizontal scroll. The admin Images options has a section where you enter the classname or ID of the container that uses horizontal scroll.


a3 Lazy Load supports all WordPress video Embeds including Youtube, Vimeo and HTML5 video – for a full list see the WordPress Codex Embeds list. The WordPress embed method of copying and pasting the video url into posts and pages content area is fully supported.

Note – Works with Videos added by Text and HTML Widgets but not the new WordPress Video widget. That widget does not pull iframe at first load, it uses JavaScript to replace html to iframe and hence a3 lazy Load can’t see it to apply.

From the a3 lazy Load admin panel turn Video Support ON | OFF. When ON you can choose to ON | OFF lazy load for videos in

Video embeded by URL in Post and Pages (All Content areas)
Video in Widget types, Text Widget and HTML Widgets.
Youtube see demo
Video see demo
Fully Compatible with the popular Youtube Embed Plugin

a3 Lazy Load has built in support for content that is added by iframe from any source in content and widgets. Examples

WordPress embedded media
Facebook Like boxes with profiles, Like buttons, Recommend
Google+ Profile
Fully compatible with WordPress embed post on any site feature introduced in version WP version 4.4
Makes embed post load much faster
Built in auto support for WordPress AMP plugin
Built in support for Better AMP plugin
There are no setting options for exclude /amp – Lazy Load is just never applied to the /amp endpoint
When the url is loaded in browser without /amp Lazy Load is applied

This is an option that you turn on as the Jetpack Accelerator (Photon CDN images) has its own lazy load feature that needs to be OFF first to be able use a3 Lazy Load as your lazy Load engine. Some users prefer to use a3 Lazy Load as it applies Lazy Load to videos and iframes as well as images.


a3 Lazy Load has built in automatic support for WebP images. There are no settings for this as a3 Lazy Load will automatically detect if an image has a WebP version and lazy load the WebP version. If no WebP image exists, the appropriate jpg or png version will be lazy loaded. Also fully support browser detection of WebP.


a3 Lazy Load gives you the option to lazy load images with a FADE IN or SPINNER effect

FADEIN see demo
SPINNER see demo
Option to create a custom Lazy Load pre-load background colour

a3 Lazy Load gives you the option to load its script from your sites HEAD or from the FOOT.

Note that your theme must have the wp_footer() function if you select FOOTER load.
Note the plugin CSS is always loaded from the HEAD.

a3 Lazy Load allows you to easily exclude any image or video by class name from having the Lazy Load effect applied. See FAQ’s


a3 Lazy Load has built in Noscript fallback if user has JavaScript turned off in their browser. Developers who use underscore.js in their applications can use the Noscript parameter to exclude their plugins content from Lazy Load.


a3 Lazy Load works with any WordPress theme that follows the WordPress Theme Codex. However, many Theme & Plugin developers will use a custom written function to add objects, example the theme has a home page with layout created by a custom function they have written. a3 Lazy Load cannot know what these functions are and so cannot apply to the objects loaded by that custom function.

If your images or objects not being Lazy Loaded in a certain section of your site, but are Lazy Loaded everywhere else you will know this is the cause. Please if this happens raise a support ticket with the developer, explaining that they just need to add a simple tag to their custom functions so that a3 Lazy Load apply to their custom function and be fully compatible. Here is a list of a3 lazy Load filter tags to include in your ticket to make it easy for the developer.

Don’t forget when a developer does add full compatibility with a3 Lazy Load please let us know via a support ticket on this forum and we will add them to the list below.

These are just some of the more popular plugins that are either tested 100% compatible with a3 Lazy Load or tags has been added for 100% compatibility.

Plugin – Advanced Custom Fields (Free and Premium)
Plugin – WooCommerce
Plugin – JetPack
Plugin – Elementor (Free and Pro)
Plugin – WP Offload
Plugin – WP Super Cache, W3 Total Cache, Autoptimize
Plugin – Youtube Embed
Plugin – WordPress AMP
Plugin – WPTouch. Note – Set to not apply on Mobiles if WPTouch is installed
Plugin – MobilePress – Set to not apply on Mobiles if MobilePress is installed
WebP Plugins – Smush, EWWW Image Optimizer, Imagify, WebP Express
Plugins – Will not conflict with any plugin that has lazy load built in
CDN’s – JetPack Accelerator, Cloudfront, Cloudflare and all other known CDN architecture.
Full support of jQueryMobile framework
WordPress Multi site ready.
Backend support for RTL display.
Translation ready

When you download a3 lazy Load, you join our community. Regardless of if you are a WordPress newbie or experienced developer if you are interested in contributing to a3 Lazy Load development head over to the a3 Lazy Load GitHub Repository to find out how you can contribute.
Want to add a new language to a3 Lazy Load? Great! You can contribute via translate.wp101.net

Install and activate the plugin
Open WordPress Settings menu
Click on a3 Lazy Load menu
Turn ON Lazy Load and all preferred settings
Save Changes and enjoy the improved performance Lazy Load will give your site