Index: Remove hasActiveFilters check

code/core/src/manager-api/modules/stories.ts

@@ -61,7 +61,6 @@ import {
 } from '../lib/stories.ts';
 import type { ModuleFn } from '../lib/types.tsx';
 import { buildNavigationUrl } from '../lib/url.ts';
-import { hasActiveFilters } from '../../shared/utils/story-index-filters.ts';
 import type { ComposedRef } from '../root.tsx';
 import { fullStatusStore } from '../stores/status.ts';
 import { BUILT_IN_FILTERS } from '../../shared/constants/tags.ts';
@@ -599,14 +598,9 @@ export const init: ModuleFn<SubAPI, SubState> = ({
     },
     selectFirstStory: () => {
       const state = store.getState();
-      const hasAnyActiveFilters = hasActiveFilters(state);
-
-      if (hasAnyActiveFilters) {
-        const { filteredIndex } = state;
-        if (!filteredIndex) {
-          return;
-        }
+      const { filteredIndex } = state;
 
+      if (filteredIndex) {
         const firstStory = Object.keys(filteredIndex).find(
           (id) => filteredIndex[id].type === 'story'
         );
@@ -1075,11 +1069,10 @@ export const init: ModuleFn<SubAPI, SubState> = ({
          * - If the user started storybook with a specific page-URL like "/settings/about"
          */
         if (isCanvasRoute) {
-          const hasAnyActiveFilters = hasActiveFilters(state);
+          const { filteredIndex } = state;
 
-          if (hasAnyActiveFilters && !stateHasSelection) {
-            const { filteredIndex } = state;
-            const storyPassesFilter = filteredIndex && filteredIndex[storyId]?.type === 'story';
+          if (filteredIndex && !stateHasSelection) {
+            const storyPassesFilter = filteredIndex[storyId]?.type === 'story';
 
             if (!storyPassesFilter) {
               const firstFiltered = filteredIndex

code/core/src/manager-api/tests/stories.test.ts

@@ -2048,6 +2048,38 @@ describe('stories API', () => {
       expect(navigate).toHaveBeenCalledWith('/story/a--2', undefined);
     });
 
+    /**
+     * Whilst the two of the built-in filters (status and tag) have easy ways to determine
+     * whether or not they are active, no other filters do - in particular, user-provided filters
+     * from experimental_setFilter.
+     *
+     * As such, the filtered index is now used if it is present, regardless of the heuristics that
+     * could be used to determine if the status/tag filters are active.
+     */
+    it('uses filteredIndex when status filters are not active', () => {
+      const moduleArgs = createMockModuleArgs({
+        initialState: {
+          path: '/',
+          index: {
+            'a--1': { type: 'story', id: 'a--1', depth: 0 } as any,
+            'a--2': { type: 'story', id: 'a--2', depth: 0 } as any,
+          },
+          filteredIndex: {
+            'a--2': { type: 'story', id: 'a--2', depth: 0 } as any,
+          },
+          includedStatusFilters: [],
+          excludedStatusFilters: [],
+          includedTagFilters: [],
+          excludedTagFilters: [],
+        } as any,
+      });
+      const { api } = initStories(moduleArgs as unknown as ModuleArgs);
+      const { navigate } = moduleArgs;
+
+      api.selectFirstStory();
+      expect(navigate).toHaveBeenCalledWith('/story/a--2', undefined);
+    });
+
     it('suppresses navigation when status filters active but filteredIndex is empty', () => {
       const moduleArgs = createMockModuleArgs({
         initialState: {

code/core/src/shared/utils/story-index-filters.ts

@@ -18,9 +18,6 @@ export const getActiveFilterCount = ({
   (includedStatusFilters?.length ?? 0) +
   (excludedStatusFilters?.length ?? 0);
 
-export const hasActiveFilters = (filters: ActiveFiltersInput): boolean =>
-  getActiveFilterCount(filters) > 0;
-
 /** Was this docs entry generated by a `.mdx` file (as opposed to an autodocs page)? */
 export function isMdxEntry({ tags }: { tags?: Tag[] }) {
   return tags?.includes(Tag.UNATTACHED_MDX) || tags?.includes(Tag.ATTACHED_MDX);