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wp-content/plugins/jetpack-boost/compatibility/revslider.php

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+<?php
+/**
+ * Compatibility for Revolution Slider
+ *
+ * @package automattic/jetpack-boost
+ */
+
+namespace Automattic\Jetpack_Boost\Compatibility\Revslider;
+
+/**
+ * Exclude Revolution Slider scripts from deferred JS.
+ * We can't use handles, since revslider doesn't have a standardized naming convention.
+ *
+ * @param array $scripts The scripts to exclude.
+ * @return array The scripts to exclude.
+ */
+function exclude_revslider_scripts( $scripts ) {
+	// Don't check scripts if Revolution Slider isn't active.
+	if ( ! class_exists( '\RevSliderFront' ) ) {
+		return $scripts;
+	}
+
+	// Filter out any revslider scripts
+	$scripts = array_filter(
+		$scripts,
+		function ( $script ) {
+			// Check if it's a script tag and contains revslider
+			if ( is_array( $script ) && isset( $script[0] ) && strpos( $script[0], '<script' ) !== false ) {
+				return strpos( $script[0], '/revslider/' ) === false;
+			}
+			return true;
+		}
+	);
+
+	return array_values( $scripts );
+}
+
+add_filter( 'jetpack_boost_render_blocking_js_exclude_scripts', __NAMESPACE__ . '\exclude_revslider_scripts', 10, 1 );