Added: W3 Total Cache compatibility

Author: Dan0sz

src/Compatibility.php

@@ -43,6 +43,11 @@ public function __construct() {
 			add_filter( 'sgo_javascript_combine_excluded_external_paths', [ $this, 'exclude_plausible_js' ] );
 		}
 
+		// W3 Total Cache
+		if ( defined( 'W3TC_VERSION' ) ) {
+			add_filter( 'w3tc_minify_js_script_tags', [ $this, 'unset_plausible_js' ] );
+		}
+
 		// WPML
 		if ( defined( 'ICL_SITEPRESS_VERSION' ) ) {
 			add_filter( 'rest_url', [ $this, 'wpml_compatibility' ], 10, 1 );
@@ -110,6 +115,26 @@ public function exclude_plausible_js( $excluded_js ) {
 		return $excluded_js;
 	}
 
+	/**
+	 * Remove Plausible.js (or the local file, when proxy is enabled) of the list of JS files to minify.
+	 *
+	 * @filter w3tc_minify_js_script_tags
+	 * @since  2.4.0
+	 *
+	 * @param $script_tags
+	 *
+	 * @return array
+	 * @throws Exception
+	 */
+	public function unset_plausible_js( $script_tags ) {
+		return array_filter(
+			$script_tags,
+			function ( $tag ) {
+				return str_contains( $tag, Helpers::get_js_url( true ) ) === false;
+			}
+		);
+	}
+
 	/**
 	 * Dear WP Rocket/SG Optimizer/Etc., don't minify/combine/delay our external JS, please.
 	 *
@@ -128,7 +153,11 @@ public function exclude_plausible_js_by_relative_url( $excluded_js ) {
 	}
 
 	/**
-	 * Dear WP Rocket/SG Optimizer/Etc. don't minify/combine/delay our API endpoint, please.
+	 * Some optimization plugins (WP Rocket) replace the JS src URL with their own URL, before being able to exclude it.
+	 * So, when the proxy is enabled, exclusion fails. That's why we exclude again by proxy endpoint.
+	 *
+	 * @filter rocket_delay_js_exclusions
+	 * @since  2.4.0
 	 *
 	 * @param $excluded_js
 	 *