Add the trait to process the taxonomies.

includes/Query_Params_Generator.php

@@ -17,6 +17,7 @@ class Query_Params_Generator {
 	use Traits\Include_Posts;
 	use Traits\Meta_Query;
 	use Traits\Date_Query;
+	use Traits\Exclude_Taxonomies;
 
 
 	/**
@@ -28,6 +29,7 @@ class Query_Params_Generator {
 		'include_posts',
 		'meta_query',
 		'date_query',
+		'exclude_taxonomies'
 	);
 
 	/**

includes/Traits/Exclude_Taxonomies.php

@@ -0,0 +1,30 @@
+<?php
+/**
+ * Exclude_Taxonomies
+ */
+
+namespace AdvancedQueryLoop\Traits;
+
+/**
+ * Trait
+ */
+trait Exclude_Taxonomies {
+
+	/**
+	 * Main processing function.
+	 */
+	public function process_exclude_taxonomies(): void {
+		$taxonomies_to_exclude = $this->custom_params['exclude_taxonomies'];
+		if( count( $taxonomies_to_exclude ) ) {
+			$tax_query = [];
+			foreach ( $taxonomies_to_exclude as $slug ) {
+				$tax_query[]  = [
+					'taxonomy' => $slug,
+					'operator' => 'NOT EXISTS'
+				];
+			}
+			$this->custom_args['tax_query'] = $tax_query;
+		}
+	}
+}
+

src/components/exclude-taxonomies.js

@@ -37,7 +37,7 @@ export const ExcludeTaxonomies = ( { attributes, setAttributes } ) => {
 		query: {
 			multiple_posts: multiplePosts = [],
 			postType,
-			excluded_taxonomies: excludedTaxonomies = [],
+			exclude_taxonomies: excludeTaxonomies = [],
 		} = {},
 	} = attributes;
 
@@ -64,7 +64,7 @@ export const ExcludeTaxonomies = ( { attributes, setAttributes } ) => {
 				label={ __( 'Exclude Taxonomies', 'advanced-query-loop' ) }
 				value={
 					prepDataFromTokenField(
-						excludedTaxonomies,
+						excludeTaxonomies,
 						taxonomies,
 						'slug',
 						'name'
@@ -75,7 +75,7 @@ export const ExcludeTaxonomies = ( { attributes, setAttributes } ) => {
 					setAttributes( {
 						query: {
 							...attributes.query,
-							excluded_taxonomies:
+							exclude_taxonomies:
 								prepDataFromTokenField(
 									selectedTaxonomies,
 									taxonomies,