UI: Improve tabs component, more type correct, allow for FC as title

code/addons/a11y/src/manager.tsx

@@ -22,7 +22,6 @@ addons.register(ADDON_ID, (api) => {
       const totalNb = violationsNb + incompleteNb;
       return totalNb !== 0 ? `Accessibility (${totalNb})` : 'Accessibility';
     },
-    id: 'accessibility',
     type: types.PANEL,
     render: ({ active = true, key }) => (
       <A11yContextProvider key={key} active={active}>

code/addons/actions/src/manager.tsx

@@ -42,7 +42,6 @@ addons.register(ADDON_ID, (api) => {
 
   addons.add(PANEL_ID, {
     title: <Title count={countRef} />,
-    id: 'actions',
     type: types.PANEL,
     render: ({ active, key }) => <ActionLogger key={key} api={api} active={!!active} />,
     paramKey: PARAM_KEY,

code/addons/backgrounds/src/manager.tsx

@@ -8,7 +8,6 @@ import { GridSelector } from './containers/GridSelector';
 addons.register(ADDON_ID, () => {
   addons.add(ADDON_ID, {
     title: 'Backgrounds',
-    id: 'backgrounds',
     type: types.TOOL,
     match: ({ viewMode }) => !!(viewMode && viewMode.match(/^(story|docs)$/)),
     render: () => (

code/addons/controls/src/manager.tsx

@@ -17,7 +17,6 @@ function Title() {
 addons.register(ADDON_ID, (api) => {
   addons.add(ADDON_ID, {
     title: <Title />,
-    id: 'controls',
     type: types.PANEL,
     paramKey: PARAM_KEY,
     render: ({ key, active }) => {

code/addons/jest/src/manager.tsx

@@ -8,7 +8,6 @@ addons.register(ADDON_ID, (api) => {
   addons.add(PANEL_ID, {
     title: 'Tests',
     type: types.PANEL,
-    id: 'tests',
     render: ({ active, key }) => <Panel key={key} api={api} active={active} />,
     paramKey: PARAM_KEY,
   });

code/addons/measure/src/manager.tsx

@@ -7,7 +7,6 @@ import { Tool } from './Tool';
 addons.register(ADDON_ID, () => {
   addons.add(TOOL_ID, {
     type: types.TOOL,
-    id: 'measure',
     title: 'Measure',
     match: ({ viewMode }) => viewMode === 'story',
     render: () => <Tool />,

code/addons/outline/src/manager.tsx

@@ -7,7 +7,6 @@ import { OutlineSelector } from './OutlineSelector';
 addons.register(ADDON_ID, () => {
   addons.add(ADDON_ID, {
     title: 'Outline',
-    id: 'outline',
     type: types.TOOL,
     match: ({ viewMode }) => !!(viewMode && viewMode.match(/^(story|docs)$/)),
     render: () => <OutlineSelector />,

code/addons/storysource/src/manager.tsx

@@ -8,7 +8,6 @@ addons.register(ADDON_ID, (api) => {
   addons.add(PANEL_ID, {
     type: types.PANEL,
     title: 'Code',
-    id: 'code',
     render: ({ active, key }) => (active ? <StoryPanel key={key} api={api} /> : null),
     paramKey: 'storysource',
   });

code/addons/toolbars/src/manager.tsx

@@ -6,7 +6,6 @@ import { ADDON_ID } from './constants';
 addons.register(ADDON_ID, () =>
   addons.add(ADDON_ID, {
     title: ADDON_ID,
-    id: 'toolbar',
     type: types.TOOL,
     match: () => true,
     render: () => <ToolbarManager />,

code/addons/viewport/src/manager.tsx

@@ -8,7 +8,6 @@ import { ViewportTool } from './Tool';
 addons.register(ADDON_ID, () => {
   addons.add(ADDON_ID, {
     title: 'viewport / media-queries',
-    id: 'viewport',
     type: types.TOOL,
     match: ({ viewMode }) => viewMode === 'story',
     render: () => <ViewportTool />,

code/lib/manager-api/src/lib/addons.ts

@@ -21,6 +21,13 @@ export function isSupportedType(type: Addon_Types): boolean {
   return !!Object.values(Addon_TypesEnum).find((typeVal) => typeVal === type);
 }
 
+interface DeprecatedAddonWithId {
+  /**
+   * @deprecated will be removed in 8.0, when registering addons, please use the addon id as the first argument
+   */
+  id?: string;
+}
+
 export class AddonStore {
   constructor() {
     this.promise = new Promise((res) => {
@@ -93,17 +100,20 @@ export class AddonStore {
     return this.elements[type];
   };
 
-  addPanel = (name: string, options: Addon_Type): void => {
-    this.add(name, {
+  addPanel = (
+    id: string,
+    options: Omit<Addon_Type, 'type' | 'id'> & DeprecatedAddonWithId
+  ): void => {
+    this.add(id, {
       type: Addon_TypesEnum.PANEL,
       ...options,
     });
   };
 
-  add = (name: string, addon: Addon_Type) => {
+  add = (id: string, addon: Omit<Addon_Type, 'id'> & DeprecatedAddonWithId) => {
     const { type } = addon;
     const collection = this.getElements(type);
-    collection[name] = { id: name, ...addon };
+    collection[id] = { id, ...addon };
   };
 
   setConfig = (value: Addon_Config) => {

code/lib/types/src/modules/addons.ts

@@ -1,5 +1,6 @@
 /* eslint-disable @typescript-eslint/naming-convention */
 
+import type { ReactElement, ReactNode, ValidationMap, WeakValidationMap } from 'react';
 import type { RenderData as RouterData } from '../../../router/src/types';
 import type { ThemeVars } from '../../../theming/src/types';
 import type {
@@ -20,7 +21,7 @@ import type {
 } from './csf';
 import type { IndexEntry } from './storyIndex';
 
-export type Addon_Types = Addon_TypesEnum | string;
+export type Addon_Types = Addon_TypesEnum;
 
 export interface Addon_ArgType<TArg = unknown> extends InputType {
   defaultValue?: TArg;
@@ -122,9 +123,10 @@ export interface Addon_AddStoryArgs<StoryFnReturnType = unknown> {
   parameters: Parameters;
 }
 
-export interface Addon_ClientApiAddon<StoryFnReturnType = unknown> extends Addon_Type {
+export type Addon_ClientApiAddon<StoryFnReturnType = unknown> = Addon_Type & {
   apply: (a: Addon_StoryApi<StoryFnReturnType>, b: any[]) => any;
-}
+};
+
 export interface Addon_ClientApiAddons<StoryFnReturnType> {
   [key: string]: Addon_ClientApiAddon<StoryFnReturnType>;
 }
@@ -301,15 +303,19 @@ export interface Addon_RenderOptions {
   key?: string;
 }
 
+/**
+ * @deprecated This type is deprecated and will be removed in 8.0.
+ */
 export type ReactJSXElement = {
   type: any;
   props: any;
   key: any;
 };
 
-export interface Addon_Type {
-  title: (() => string) | string | ReactJSXElement;
-  type?: Addon_Types;
+export type Addon_Type = Addon_BaseType;
+export interface Addon_BaseType {
+  title: FCWithoutChildren | string | ReactElement | ReactNode;
+  type: Addon_Types;
   id?: string;
   route?: (routeOptions: RouterData) => string;
   match?: (matchOptions: RouterData) => boolean;
@@ -319,13 +325,27 @@ export interface Addon_Type {
   hidden?: boolean;
 }
 
+/**
+ * This is a copy of FC from react/index.d.ts, but has the PropsWithChildren type removed
+ * this is correct and more type strict, and future compatible with React.FC in React 18+
+ *
+ * @deprecated This type is deprecated and will be removed in 8.0. (assuming the manager uses React 18 is out by then)
+ */
+interface FCWithoutChildren<P = {}> {
+  (props: P, context?: any): ReactElement<any, any> | null;
+  propTypes?: WeakValidationMap<P> | undefined;
+  contextTypes?: ValidationMap<any> | undefined;
+  defaultProps?: Partial<P> | undefined;
+  displayName?: string | undefined;
+}
+
 export type Addon_Loader<API> = (api: API) => void;
 
 export interface Addon_Loaders<API> {
   [key: string]: Addon_Loader<API>;
 }
-export interface Addon_Collection {
-  [key: string]: Addon_Type;
+export interface Addon_Collection<T = Addon_Type> {
+  [key: string]: T;
 }
 export interface Addon_Elements {
   [key: string]: Addon_Collection;
@@ -342,10 +362,31 @@ export interface Addon_Config {
 }
 
 export enum Addon_TypesEnum {
+  /**
+   * This API is used to create a tab the toolbar above the canvas, This API might be removed in the future.
+   * @unstable
+   */
   TAB = 'tab',
+  /**
+   * This adds panels to the addons side panel.
+   */
   PANEL = 'panel',
+  /**
+   * This adds items in the toolbar above the canvas - on the right side.
+   */
   TOOL = 'tool',
+  /**
+   * This adds items in the toolbar above the canvas - on the right side.
+   */
   TOOLEXTRA = 'toolextra',
+  /**
+   * This adds wrapper components around the canvas/iframe component storybook renders.
+   * @unstable
+   */
   PREVIEW = 'preview',
+
+  /**
+   * @deprecated This property does nothing, and will be removed in Storybook 8.0.
+   */
   NOTES_ELEMENT = 'notes-element',
 }

code/lib/types/src/modules/api.ts

@@ -7,7 +7,7 @@ import type { ViewMode } from './csf';
 import type { DocsOptions } from './core-common';
 import type { API_HashEntry, API_IndexHash } from './api-stories';
 import type { SetStoriesStory, SetStoriesStoryData } from './channelApi';
-import type { Addon_Type } from './addons';
+import type { Addon_Collection, Addon_Type } from './addons';
 import type { StoryIndex } from './storyIndex';
 
 export type API_ViewMode = 'story' | 'info' | 'settings' | 'page' | undefined | string;
@@ -32,11 +32,9 @@ export interface API_MatchOptions {
 
 export type API_Addon = Addon_Type;
 
-export interface API_Collection<T = API_Addon> {
-  [key: string]: T;
-}
+export type API_Collection<T = Addon_Type> = Addon_Collection<T>;
 
-export type API_Panels = API_Collection<API_Addon>;
+export type API_Panels = Addon_Collection<Addon_Type>;
 
 export type API_StateMerger<S> = (input: S) => S;
 

code/ui/components/src/tabs/tabs.helpers.tsx

@@ -1,6 +1,8 @@
 import { styled } from '@storybook/theming';
-import type { ReactElement } from 'react';
+import type { FC, ReactChild, ReactElement, ReactNode } from 'react';
 import React, { Children } from 'react';
+import type { Addon_RenderOptions } from '@storybook/types';
+import type { TabsProps } from './tabs';
 
 export interface VisuallyHiddenProps {
   active?: boolean;
@@ -10,25 +12,41 @@ export const VisuallyHidden = styled.div<VisuallyHiddenProps>(({ active }) =>
   active ? { display: 'block' } : { display: 'none' }
 );
 
-export const childrenToList = (children: any, selected: string) =>
+export const childrenToList = (children: TabsProps['children']) =>
   Children.toArray(children).map(
-    ({ props: { title, id, color, children: childrenOfChild } }: ReactElement, index) => {
-      const content = Array.isArray(childrenOfChild) ? childrenOfChild[0] : childrenOfChild;
+    ({
+      props: { title, id, color, children: childrenOfChild },
+    }: ReactElement<{
+      children: FC<Addon_RenderOptions> | ReactChild | null;
+      title: ReactChild | null | FC;
+      id: string;
+      color?: string;
+    }>) => {
+      const content: FC<Addon_RenderOptions> | ReactNode = Array.isArray(childrenOfChild)
+        ? childrenOfChild[0]
+        : childrenOfChild;
+
+      const render: FC<Addon_RenderOptions> = (
+        typeof content === 'function'
+          ? content
+          : ({ active, key }: any) => (
+              <VisuallyHidden key={key} active={active} role="tabpanel">
+                {content}
+              </VisuallyHidden>
+            )
+      ) as FC<Addon_RenderOptions>;
       return {
-        active: selected ? id === selected : index === 0,
         title,
         id,
-        color,
-        render:
-          typeof content === 'function'
-            ? content
-            : ({ active, key }: any) => (
-                <VisuallyHidden key={key} active={active} role="tabpanel">
-                  {content}
-                </VisuallyHidden>
-              ),
+        ...(color ? { color } : {}),
+        render,
       };
     }
   );
 
 export type ChildrenList = ReturnType<typeof childrenToList>;
+export type ChildrenListComplete = Array<
+  ReturnType<typeof childrenToList>[0] & {
+    active: boolean;
+  }
+>;

code/ui/components/src/tabs/tabs.hooks.tsx

@@ -5,7 +5,7 @@ import useResizeObserver from 'use-resize-observer';
 import { TabButton } from '../bar/button';
 import { TooltipLinkList } from '../tooltip/TooltipLinkList';
 import { WithTooltip } from '../tooltip/WithTooltip';
-import type { ChildrenList } from './tabs.helpers';
+import type { ChildrenListComplete } from './tabs.helpers';
 import type { Link } from '../tooltip/TooltipLinkList';
 
 const CollapseIcon = styled.span<{ isActive: boolean }>(({ theme, isActive }) => ({
@@ -32,7 +32,7 @@ const AddonButton = styled(TabButton)<{ preActive: boolean }>(({ active, theme,
   `;
 });
 
-export function useList(list: ChildrenList) {
+export function useList(list: ChildrenListComplete) {
   const tabBarRef = useRef<HTMLDivElement>();
   const addonsRef = useRef<HTMLButtonElement>();
   const tabRefs = useRef(new Map<string, HTMLButtonElement>());
@@ -41,8 +41,8 @@ export function useList(list: ChildrenList) {
   });
 
   const [visibleList, setVisibleList] = useState(list);
-  const [invisibleList, setInvisibleList] = useState<ChildrenList>([]);
-  const previousList = useRef<ChildrenList>(list);
+  const [invisibleList, setInvisibleList] = useState<ChildrenListComplete>([]);
+  const previousList = useRef<ChildrenListComplete>(list);
 
   const AddonTab = useCallback(
     ({
@@ -134,7 +134,7 @@ export function useList(list: ChildrenList) {
     const { width: widthAddonsTab } = addonsRef.current.getBoundingClientRect();
     const rightBorder = invisibleList.length ? x + width - widthAddonsTab : x + width;
 
-    const newVisibleList: ChildrenList = [];
+    const newVisibleList: ChildrenListComplete = [];
 
     let widthSum = 0;