jetpack / modules / lazy-images.php

lazy-images.php in Jetpack – WP Security, Backup, Speed, & Growth 6.9, at modules/lazy-images.php

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1	<?php
2
3	/**
4	* Module Name: Lazy Images
5	* Module Description: Lazy load images
6	* Jumpstart Description: Lazy-loading images improve your site's speed and create a smoother viewing experience. Images will load as visitors scroll down the screen, instead of all at once.
7	* Sort Order: 24
8	* Recommendation Order: 14
9	* First Introduced: 5.6.0
10	* Requires Connection: No
11	* Auto Activate: No
12	* Module Tags: Appearance, Recommended
13	* Feature: Appearance, Jumpstart
14	* Additional Search Queries: mobile, theme, performance, image
15	*/
16
17	/**
18	* This module relies heavily upon the Lazy Load plugin which was worked on by
19	* Mohammad Jangda (batmoo), the WordPress.com VIP team, the TechCrunch 2011
20	* redesign team, and Jake Goldman of 10up LLC.
21	*
22	* The JavaScript has been updated to rely on InterSection observer instead of
23	* jQuery Sonar. Many thanks to Dean Hume (deanhume) and his example:
24	* https://github.com/deanhume/lazy-observer-load
25	*/
26
27	require_once( JETPACK__PLUGIN_DIR . 'modules/lazy-images/lazy-images.php' );
28
29	/*
30	* Initialize lazy images on the wp action so that conditional
31	* tags are safe to use.
32	*
33	* As an example, this is important if a theme wants to disable lazy images except
34	* on single posts, pages, or attachments by short-circuiting lazy images when
35	* is_singular() returns false.
36	*
37	* See: https://github.com/Automattic/jetpack/issues/8888
38	*/
39
40	add_action( 'wp', array( 'Jetpack_Lazy_Images', 'instance' ) );
41