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<?php
namespace Elementor\Modules\LazyLoad;
use Elementor\Core\Base\Module as BaseModule;
use Elementor\Plugin;
if ( ! defined( 'ABSPATH' ) ) {
exit; // Exit if accessed directly.
}
class Module extends BaseModule {
public function get_name() {
return 'lazyload';
}
public function __construct() {
parent::__construct();
add_action( 'init', [ $this, 'init' ] );
}
public function init() {
if ( ! $this->is_lazy_load_background_images_enabled() ) {
return;
}
add_action( 'wp_head', function() {
if ( ! $this->should_lazy_load_background_images() ) {
return;
}
?>
<style>
.e-con.e-parent:nth-of-type(n+4):not(.e-lazyloaded):not(.e-no-lazyload),
.e-con.e-parent:nth-of-type(n+4):not(.e-lazyloaded):not(.e-no-lazyload) * {
background-image: none !important;
}
@media screen and (max-height: 1024px) {
.e-con.e-parent:nth-of-type(n+3):not(.e-lazyloaded):not(.e-no-lazyload),
.e-con.e-parent:nth-of-type(n+3):not(.e-lazyloaded):not(.e-no-lazyload) * {
background-image: none !important;
}
}
@media screen and (max-height: 640px) {
.e-con.e-parent:nth-of-type(n+2):not(.e-lazyloaded):not(.e-no-lazyload),
.e-con.e-parent:nth-of-type(n+2):not(.e-lazyloaded):not(.e-no-lazyload) * {
background-image: none !important;
}
}
</style>
<?php
} );
add_action( 'wp_footer', function() {
if ( ! $this->should_lazy_load_background_images() ) {
return;
}
?>
<script>
const lazyloadRunObserver = () => {
const lazyloadBackgrounds = document.querySelectorAll( `.e-con.e-parent:not(.e-lazyloaded)` );
const lazyloadBackgroundObserver = new IntersectionObserver( ( entries ) => {
entries.forEach( ( entry ) => {
if ( entry.isIntersecting ) {
let lazyloadBackground = entry.target;
if( lazyloadBackground ) {
lazyloadBackground.classList.add( 'e-lazyloaded' );
}
lazyloadBackgroundObserver.unobserve( entry.target );
}
});
}, { rootMargin: '200px 0px 200px 0px' } );
lazyloadBackgrounds.forEach( ( lazyloadBackground ) => {
lazyloadBackgroundObserver.observe( lazyloadBackground );
} );
};
const events = [
'DOMContentLoaded',
'elementor/lazyload/observe',
];
events.forEach( ( event ) => {
document.addEventListener( event, lazyloadRunObserver );
} );
</script>
<?php
} );
}
private function should_lazy_load_background_images(): bool {
return ! is_admin() && ! Plugin::$instance->preview->is_preview_mode() && ! Plugin::$instance->editor->is_edit_mode();
}
private static function is_lazy_load_background_images_enabled(): bool {
return '1' === get_option( 'elementor_lazy_load_background_images', '1' );
}
}