Add the utils file and move a few functions into there.

src/components/exclude-taxonomies.js

@@ -1,6 +1,3 @@
-/**
- * WordPress dependencies
- */
 /**
  * WordPress dependencies
  */
@@ -10,27 +7,9 @@ import { useSelect } from '@wordpress/data';
 import { store as coreDataStore } from '@wordpress/core-data';
 
 /**
- * A helper to retrieve the correct items to display or save in the token field
- *
- * @param {Array}  subSet
- * @param {Array}  fullSet
- * @param {string} lookupProperty
- * @param {string} returnProperty
- * @return {Array} The correct items to display or save in the token field
+ * Internal dependencies
  */
-function prepDataFromTokenField(
-	subSet,
-	fullSet,
-	lookupProperty,
-	returnProperty
-) {
-	const subsetFullObjects = fullSet.filter( ( item ) =>
-		subSet.includes( item[ lookupProperty ] )
-	);
-	return subsetFullObjects.map(
-		( { [ returnProperty ]: returnVal } ) => returnVal
-	);
-}
+import { prepDataFromTokenField } from '../utils';
 
 export const ExcludeTaxonomies = ( { attributes, setAttributes } ) => {
 	const {

src/utils/index.js

@@ -0,0 +1,44 @@
+/**
+ * Helper function to update taxonomy queries.
+ *
+ * @param {Array}  queries The current queries.
+ * @param {string} queryId The query ID to update.
+ * @param {string} item    The key to update.
+ * @param {string} value   The value to update.
+ *
+ * @return {Array} The updated queries.
+ */
+export const updateTaxonomyQuery = ( queries, queryId, item, value ) => {
+	return queries.map( ( query ) => {
+		if ( query.id === queryId ) {
+			return {
+				...query,
+				[ item ]: value,
+			};
+		}
+		return query;
+	} );
+};
+
+/**
+ * A helper to retrieve the correct items to display or save in the token field
+ *
+ * @param {Array}  subSet
+ * @param {Array}  fullSet
+ * @param {string} lookupProperty
+ * @param {string} returnProperty
+ * @return {Array} The correct items to display or save in the token field
+ */
+export const prepDataFromTokenField = (
+	subSet,
+	fullSet,
+	lookupProperty,
+	returnProperty
+) => {
+	const subsetFullObjects = fullSet.filter( ( item ) =>
+		subSet.includes( item[ lookupProperty ] )
+	);
+	return subsetFullObjects.map(
+		( { [ returnProperty ]: returnVal } ) => returnVal
+	);
+};