[WordPress][WP Rocket] Programmatically disables WP Rocket’s LazyLoad feature on pages with Essential Grid.

wp-rocket-unlazyload-essential-grid.php

<?php
/**
 * Plugin Name: WP Rocket | UnLazyLoad Essential Grid
 * Description: Disables WP Rocket’s LazyLoad feature on pages with <a href="https://www.themepunch.com/portfolio/essential-grid-wordpress-plugin/">Essential Grid</a>.
 * Author:      WP Rocket Support Team
 * Author URI:  http://wp-rocket.me/
 * Plugin URI:  http://docs.wp-rocket.me/article/139-disable-lazyload-on-mobile#inactive
 * License:     GNU General Public License v3 or later
 * License URI: http://www.gnu.org/licenses/gpl-3.0.html
 */

defined( 'ABSPATH' ) or die( 'You know better.' );

/**
 * Disables WP Rocket’s LazyLoad feature on pages with Essential Grid.
 * @param  string $content WP Post content
 * @return string          WP Post content
 */
function wp_rocket__unlazyload_essential_grid( $content ) {

	if ( is_admin() || ! class_exists( 'Essential_Grid' ) || ! function_exists( 'has_shortcode' ) )
		return $content;

	if ( has_shortcode( $content, 'ess_grid' )
	  || has_shortcode( $content, 'ess_grid_search' )
	  || has_shortcode( $content, 'ess_grid_nav' )
	  || has_shortcode( $content, 'ess_grid_ajax_target' ) ) {
		add_filter( 'do_rocket_lazyload', '__return_false' );
	}

	return $content;
}
add_filter( 'the_content', 'wp_rocket__unlazyload_essential_grid' );