refactor(rtk-query): reduce selector computations

Other changes:

* simplify TreeView props

packages/redux-devtools-rtk-query-monitor/src/components/QueryPreview.tsx

@@ -2,51 +2,101 @@ import React, { ReactNode } from 'react';
 import { StyleUtilsContext } from '../styles/createStylingFromTheme';
 import { createTreeItemLabelRenderer } from '../styles/tree';
 import {
-  QueryPreviewTabOption,
   QueryPreviewTabs,
-  QueryPreviewTabProps,
+  QueryInfo,
+  SelectorsSource,
+  TabOption,
 } from '../types';
 import { QueryPreviewHeader } from './QueryPreviewHeader';
-import { QueryPreviewInfo } from './QueryPreviewInfo';
+import { QueryPreviewInfo, QueryPreviewInfoProps } from './QueryPreviewInfo';
-import { QueryPreviewApi } from './QueryPreviewApi';
+import { QueryPreviewApi, QueryPreviewApiProps } from './QueryPreviewApi';
-import { QueryPreviewSubscriptions } from './QueryPreviewSubscriptions';
+import {
-import { QueryPreviewTags } from './QueryPreviewTags';
+  QueryPreviewSubscriptions,
+  QueryPreviewSubscriptionsProps,
+} from './QueryPreviewSubscriptions';
+import { QueryPreviewTags, QueryPreviewTagsProps } from './QueryPreviewTags';
 import { NoRtkQueryApi } from './NoRtkQueryApi';
+import { InspectorSelectors } from '../selectors';
+import { StylingFunction } from 'react-base16-styling';
+import { mapProps } from '../containers/mapProps';
 
-export interface QueryPreviewProps
+export interface QueryPreviewProps<S = unknown> {
-  extends Omit<QueryPreviewTabProps, 'base16Theme' | 'invertTheme'> {
+  readonly selectedTab: QueryPreviewTabs;
-  selectedTab: QueryPreviewTabs;
+  readonly hasNoApis: boolean;
-  hasNoApis: boolean;
+  readonly onTabChange: (tab: QueryPreviewTabs) => void;
-  onTabChange: (tab: QueryPreviewTabs) => void;
+  readonly queryInfo: QueryInfo | null;
+  readonly styling: StylingFunction;
+  readonly isWideLayout: boolean;
+  readonly selectorsSource: SelectorsSource<S>;
+  readonly selectors: InspectorSelectors<S>;
 }
 
-const tabs: ReadonlyArray<QueryPreviewTabOption> = [
+/**
+ * Tab content is not rendered if there's no selected query.
+ */
+type QueryPreviewTabProps = Omit<QueryPreviewProps<unknown>, 'queryInfo'> & {
+  queryInfo: QueryInfo;
+};
+
+const MappedQueryPreviewTags = mapProps<
+  QueryPreviewTabProps,
+  QueryPreviewTagsProps
+>(({ selectors, selectorsSource, isWideLayout, queryInfo }) => ({
+  queryInfo,
+  tags: selectors.selectCurrentQueryTags(selectorsSource),
+  isWideLayout,
+}))(QueryPreviewTags);
+
+const MappedQueryPreviewInfo = mapProps<
+  QueryPreviewTabProps,
+  QueryPreviewInfoProps
+>(({ queryInfo, isWideLayout }) => ({ queryInfo, isWideLayout }))(
+  QueryPreviewInfo
+);
+
+const MappedQuerySubscriptipns = mapProps<
+  QueryPreviewTabProps,
+  QueryPreviewSubscriptionsProps
+>(({ selectors, selectorsSource, isWideLayout }) => ({
+  isWideLayout,
+  subscriptions: selectors.selectSubscriptionsOfCurrentQuery(selectorsSource),
+}))(QueryPreviewSubscriptions);
+
+const MappedApiPreview = mapProps<QueryPreviewTabProps, QueryPreviewApiProps>(
+  ({ isWideLayout, selectors, selectorsSource }) => ({
+    isWideLayout,
+    apiState: selectors.selectApiOfCurrentQuery(selectorsSource),
+    apiStats: selectors.selectApiStatsOfCurrentQuery(selectorsSource),
+  })
+)(QueryPreviewApi);
+
+const tabs: ReadonlyArray<TabOption<QueryPreviewTabs, QueryPreviewTabProps>> = [
   {
     label: 'query',
     value: QueryPreviewTabs.queryinfo,
-    component: QueryPreviewInfo,
+    component: MappedQueryPreviewInfo,
   },
   {
     label: 'tags',
     value: QueryPreviewTabs.queryTags,
-    component: QueryPreviewTags,
+    component: MappedQueryPreviewTags,
   },
   {
     label: 'subs',
     value: QueryPreviewTabs.querySubscriptions,
-    component: QueryPreviewSubscriptions,
+    component: MappedQuerySubscriptipns,
   },
   {
     label: 'api',
     value: QueryPreviewTabs.apiConfig,
-    component: QueryPreviewApi,
+    component: MappedApiPreview,
   },
 ];
 
-export class QueryPreview extends React.PureComponent<QueryPreviewProps> {
+export class QueryPreview<S> extends React.PureComponent<QueryPreviewProps<S>> {
   readonly labelRenderer: ReturnType<typeof createTreeItemLabelRenderer>;
 
-  constructor(props: QueryPreviewProps) {
+  constructor(props: QueryPreviewProps<S>) {
     super(props);
 
     this.labelRenderer = createTreeItemLabelRenderer(this.props.styling);
@@ -65,40 +115,19 @@ export class QueryPreview extends React.PureComponent<QueryPreviewProps> {
     return `${label} (${counterAsString})`;
   };
 
-  renderTabLabel = (tab: QueryPreviewTabOption): ReactNode => {
+  renderTabLabel = (tab: TabOption<QueryPreviewTabs, unknown>): ReactNode => {
-    const { queryInfo, tags, querySubscriptions } = this.props;
+    const { selectors, selectorsSource } = this.props;
-    if (queryInfo) {
+    const tabCount = selectors.selectTabCounters(selectorsSource)[tab.value];
-      if (tab.value === QueryPreviewTabs.queryTags && tags.length > 0) {
-        return this.renderLabelWithCounter(tab.label, tags.length);
-      }
 
-      if (
+    if (tabCount > 0) {
-        tab.value === QueryPreviewTabs.querySubscriptions &&
+      return this.renderLabelWithCounter(tab.label, tabCount);
-        querySubscriptions
-      ) {
-        const subsCount = Object.keys(querySubscriptions).length;
-
-        if (subsCount > 0) {
-          return this.renderLabelWithCounter(tab.label, subsCount);
-        }
-      }
     }
 
     return tab.label;
   };
 
   render(): ReactNode {
-    const {
+    const { queryInfo, selectedTab, onTabChange, hasNoApis } = this.props;
-      queryInfo,
-      isWideLayout,
-      selectedTab,
-      apiState,
-      onTabChange,
-      querySubscriptions,
-      tags,
-      apiStats,
-      hasNoApis,
-    } = this.props;
 
     const { component: TabComponent } =
       tabs.find((tab) => tab.value === selectedTab) || tabs[0];
@@ -111,7 +140,9 @@ export class QueryPreview extends React.PureComponent<QueryPreviewProps> {
               <QueryPreviewHeader
                 selectedTab={selectedTab}
                 onTabChange={onTabChange}
-                tabs={tabs}
+                tabs={
+                  tabs as ReadonlyArray<TabOption<QueryPreviewTabs, unknown>>
+                }
                 renderTabLabel={this.renderTabLabel}
               />
               {hasNoApis && <NoRtkQueryApi />}
@@ -123,26 +154,18 @@ export class QueryPreview extends React.PureComponent<QueryPreviewProps> {
 
     return (
       <StyleUtilsContext.Consumer>
-        {({ styling, base16Theme, invertTheme }) => {
+        {({ styling }) => {
           return (
             <div {...styling('queryPreview')}>
               <QueryPreviewHeader
                 selectedTab={selectedTab}
                 onTabChange={onTabChange}
-                tabs={tabs}
+                tabs={
+                  tabs as ReadonlyArray<TabOption<QueryPreviewTabs, unknown>>
+                }
                 renderTabLabel={this.renderTabLabel}
               />
-              <TabComponent
+              <TabComponent {...(this.props as QueryPreviewTabProps)} />
-                styling={styling}
-                base16Theme={base16Theme}
-                invertTheme={invertTheme}
-                querySubscriptions={querySubscriptions}
-                queryInfo={queryInfo}
-                tags={tags}
-                apiState={apiState}
-                isWideLayout={isWideLayout}
-                apiStats={apiStats}
-              />
             </div>
           );
         }}

packages/redux-devtools-rtk-query-monitor/src/components/QueryPreviewApi.tsx

@@ -1,18 +1,19 @@
 import { createSelector } from '@reduxjs/toolkit';
 import React, { ReactNode, PureComponent } from 'react';
-import { QueryPreviewTabProps } from '../types';
+import { ApiStats, RtkQueryApiState } from '../types';
 import { TreeView } from './TreeView';
 
-interface TreeDisplayed {
+export interface QueryPreviewApiProps {
-  reducerPath: string;
+  apiStats: ApiStats | null;
-  api: QueryPreviewTabProps['apiState'];
+  apiState: RtkQueryApiState | null;
-  stats: QueryPreviewTabProps['apiStats'];
+  isWideLayout: boolean;
 }
-export class QueryPreviewApi extends PureComponent<QueryPreviewTabProps> {
+
+export class QueryPreviewApi extends PureComponent<QueryPreviewApiProps> {
   selectData = createSelector(
     [
-      ({ apiState }: QueryPreviewTabProps) => apiState,
+      ({ apiState }: QueryPreviewApiProps) => apiState,
-      ({ apiStats }: QueryPreviewTabProps) => apiStats,
+      ({ apiStats }: QueryPreviewApiProps) => apiStats,
     ],
     (apiState, apiStats) => ({
       reducerPath: apiState?.config?.reducerPath ?? null,
@@ -22,20 +23,10 @@ export class QueryPreviewApi extends PureComponent<QueryPreviewTabProps> {
   );
 
   render(): ReactNode {
-    const { queryInfo, isWideLayout, base16Theme, styling, invertTheme } =
-      this.props;
-
-    if (!queryInfo) {
-      return null;
-    }
-
     return (
       <TreeView
         data={this.selectData(this.props)}
-        isWideLayout={isWideLayout}
+        isWideLayout={this.props.isWideLayout}
-        base16Theme={base16Theme}
-        styling={styling}
-        invertTheme={invertTheme}
       />
     );
   }

packages/redux-devtools-rtk-query-monitor/src/components/QueryPreviewHeader.tsx

@@ -1,17 +1,17 @@
 import React, { ReactNode } from 'react';
 import { StyleUtilsContext } from '../styles/createStylingFromTheme';
-import { QueryPreviewTabOption, QueryPreviewTabs } from '../types';
+import { QueryPreviewTabs, TabOption } from '../types';
 import { emptyArray } from '../utils/object';
 
 export interface QueryPreviewHeaderProps {
-  tabs: ReadonlyArray<QueryPreviewTabOption>;
+  tabs: ReadonlyArray<TabOption<QueryPreviewTabs, unknown>>;
   onTabChange: (tab: QueryPreviewTabs) => void;
   selectedTab: QueryPreviewTabs;
-  renderTabLabel?: (tab: QueryPreviewTabOption) => ReactNode;
+  renderTabLabel?: (tab: QueryPreviewHeaderProps['tabs'][number]) => ReactNode;
 }
 
 export class QueryPreviewHeader extends React.Component<QueryPreviewHeaderProps> {
-  handleTabClick = (tab: QueryPreviewTabOption): void => {
+  handleTabClick = (tab: QueryPreviewHeaderProps['tabs'][number]): void => {
     if (this.props.selectedTab !== tab.value) {
       this.props.onTabChange(tab.value);
     }

packages/redux-devtools-rtk-query-monitor/src/components/QueryPreviewInfo.tsx

@@ -1,11 +1,6 @@
 import { createSelector, Selector } from '@reduxjs/toolkit';
 import React, { ReactNode, PureComponent } from 'react';
-import {
+import { QueryInfo, RtkQueryState, RTKStatusFlags } from '../types';
-  QueryInfo,
-  QueryPreviewTabProps,
-  RtkQueryState,
-  RTKStatusFlags,
-} from '../types';
 import { identity } from '../utils/object';
 import { getQueryStatusFlags } from '../utils/rtk-query';
 import { TreeView } from './TreeView';
@@ -22,17 +17,14 @@ interface FormattedQuery extends ComputedQueryInfo {
   query: RtkQueryState;
 }
 
-export class QueryPreviewInfo extends PureComponent<QueryPreviewTabProps> {
+export interface QueryPreviewInfoProps {
-  selectFormattedQuery: Selector<
+  queryInfo: QueryInfo;
-    QueryPreviewTabProps['queryInfo'],
+  isWideLayout: boolean;
-    FormattedQuery | null
-  > = createSelector(
-    identity,
-    (queryInfo: QueryInfo | null): FormattedQuery | null => {
-      if (!queryInfo) {
-        return null;
 }
-
+export class QueryPreviewInfo extends PureComponent<QueryPreviewInfoProps> {
+  selectFormattedQuery: Selector<QueryInfo, FormattedQuery> = createSelector(
+    identity,
+    (queryInfo: QueryInfo): FormattedQuery => {
       const { query, queryKey, reducerPath } = queryInfo;
 
       const startedAt = query.startedTimeStamp
@@ -57,23 +49,9 @@ export class QueryPreviewInfo extends PureComponent<QueryPreviewTabProps> {
   );
 
   render(): ReactNode {
-    const { queryInfo, isWideLayout, base16Theme, styling, invertTheme } =
+    const { queryInfo, isWideLayout } = this.props;
-      this.props;
-
     const formattedQuery = this.selectFormattedQuery(queryInfo);
 
-    if (!formattedQuery) {
+    return <TreeView data={formattedQuery} isWideLayout={isWideLayout} />;
-      return null;
-    }
-
-    return (
-      <TreeView
-        data={formattedQuery}
-        isWideLayout={isWideLayout}
-        base16Theme={base16Theme}
-        styling={styling}
-        invertTheme={invertTheme}
-      />
-    );
   }
 }

packages/redux-devtools-rtk-query-monitor/src/components/QueryPreviewSubscriptions.tsx

@@ -1,60 +1,18 @@
 import React, { ReactNode, PureComponent } from 'react';
-import { QueryPreviewTabProps } from '../types';
+import { RtkQueryApiState } from '../types';
 import { TreeView } from './TreeView';
 
-export interface QueryPreviewSubscriptionsState {
+export interface QueryPreviewSubscriptionsProps {
-  data: { subscriptions: QueryPreviewTabProps['querySubscriptions'] };
+  subscriptions: RtkQueryApiState['subscriptions'][keyof RtkQueryApiState['subscriptions']];
-}
+  isWideLayout: boolean;
-
-export class QueryPreviewSubscriptions extends PureComponent<
-  QueryPreviewTabProps,
-  QueryPreviewSubscriptionsState
-> {
-  static getDerivedStateFromProps(
-    props: QueryPreviewTabProps,
-    state: QueryPreviewSubscriptionsState
-  ): Partial<QueryPreviewSubscriptionsState> | null {
-    if (props.querySubscriptions !== state.data.subscriptions) {
-      return {
-        data: { subscriptions: props.querySubscriptions },
-      };
-    }
-
-    return null;
-  }
-
-  constructor(props: QueryPreviewTabProps) {
-    super(props);
-
-    this.state = {
-      data: { subscriptions: props.querySubscriptions },
-    };
 }
 
+export class QueryPreviewSubscriptions extends PureComponent<QueryPreviewSubscriptionsProps> {
   render(): ReactNode {
-    const {
+    const { subscriptions } = this.props;
-      queryInfo,
-      isWideLayout,
-      base16Theme,
-      styling,
-      invertTheme,
-      querySubscriptions,
-    } = this.props;
-
-    if (!querySubscriptions || !queryInfo) {
-      return null;
-    }
 
     return (
-      <>
+      <TreeView data={subscriptions} isWideLayout={this.props.isWideLayout} />
-        <TreeView
-          data={this.state.data}
-          isWideLayout={isWideLayout}
-          base16Theme={base16Theme}
-          styling={styling}
-          invertTheme={invertTheme}
-        />
-      </>
     );
   }
 }

packages/redux-devtools-rtk-query-monitor/src/components/QueryPreviewTags.tsx

@@ -1,29 +1,21 @@
 import React, { ReactNode, PureComponent } from 'react';
-import { QueryPreviewTabProps } from '../types';
+import { RtkQueryTag } from '../types';
 import { TreeView } from './TreeView';
 
 interface QueryPreviewTagsState {
-  data: { tags: QueryPreviewTabProps['tags'] };
+  data: { tags: RtkQueryTag[] };
+}
+
+export interface QueryPreviewTagsProps {
+  tags: RtkQueryTag[];
+  isWideLayout: boolean;
 }
 
 export class QueryPreviewTags extends PureComponent<
-  QueryPreviewTabProps,
+  QueryPreviewTagsProps,
   QueryPreviewTagsState
 > {
-  static getDerivedStateFromProps(
+  constructor(props: QueryPreviewTagsProps) {
-    { tags }: QueryPreviewTabProps,
-    state: QueryPreviewTagsState
-  ): QueryPreviewTagsState | null {
-    if (tags !== state.data.tags) {
-      return {
-        data: { tags },
-      };
-    }
-
-    return null;
-  }
-
-  constructor(props: QueryPreviewTabProps) {
     super(props);
 
     this.state = {
@@ -32,21 +24,8 @@ export class QueryPreviewTags extends PureComponent<
   }
 
   render(): ReactNode {
-    const { queryInfo, isWideLayout, base16Theme, styling, invertTheme } =
+    const { isWideLayout, tags } = this.props;
-      this.props;
 
-    if (!queryInfo) {
+    return <TreeView data={tags} isWideLayout={isWideLayout} />;
-      return null;
-    }
-
-    return (
-      <TreeView
-        data={this.state.data}
-        isWideLayout={isWideLayout}
-        base16Theme={base16Theme}
-        styling={styling}
-        invertTheme={invertTheme}
-      />
-    );
   }
 }

packages/redux-devtools-rtk-query-monitor/src/components/TreeView.tsx

@@ -1,11 +1,16 @@
+import { createSelector } from '@reduxjs/toolkit';
 import React, { ComponentProps, ReactNode } from 'react';
 import JSONTree from 'react-json-tree';
+import { StylingFunction } from 'react-base16-styling';
 import { DATA_TYPE_KEY } from '../monitor-config';
-import { getJsonTreeTheme } from '../styles/createStylingFromTheme';
+import {
+  getJsonTreeTheme,
+  StyleUtilsContext,
+} from '../styles/createStylingFromTheme';
 import { createTreeItemLabelRenderer, getItemString } from '../styles/tree';
-import { StyleUtils } from '../types';
+import { identity } from '../utils/object';
 
-export interface TreeViewProps extends StyleUtils {
+export interface TreeViewProps {
   data: unknown;
   isWideLayout: boolean;
   before?: ReactNode;
@@ -15,37 +20,39 @@ export interface TreeViewProps extends StyleUtils {
 }
 
 export class TreeView extends React.PureComponent<TreeViewProps> {
-  readonly labelRenderer: ReturnType<typeof createTreeItemLabelRenderer>;
+  readonly selectLabelRenderer = createSelector<
+    StylingFunction,
+    StylingFunction,
+    ReturnType<typeof createTreeItemLabelRenderer>
+  >(identity, createTreeItemLabelRenderer);
 
   constructor(props: TreeViewProps) {
     super(props);
-    this.labelRenderer = createTreeItemLabelRenderer(this.props.styling);
   }
 
   render(): ReactNode {
-    const {
+    const { isWideLayout, data, before, after, children, keyPath } = this.props;
-      styling,
-      base16Theme,
-      invertTheme,
-      isWideLayout,
-      data,
-      before,
-      after,
-      children,
-      keyPath,
-    } = this.props;
 
+    return (
+      <StyleUtilsContext.Consumer>
+        {({ styling, invertTheme, base16Theme }) => {
           return (
             <div {...styling('treeWrapper')}>
               {before}
               <JSONTree
                 keyPath={keyPath}
                 data={data}
-          labelRenderer={this.labelRenderer}
+                labelRenderer={this.selectLabelRenderer(styling)}
                 theme={getJsonTreeTheme(base16Theme)}
                 invertTheme={invertTheme}
                 getItemString={(type, data) =>
-            getItemString(styling, type, data, DATA_TYPE_KEY, isWideLayout)
+                  getItemString(
+                    styling,
+                    type,
+                    data,
+                    DATA_TYPE_KEY,
+                    isWideLayout
+                  )
                 }
                 hideRoot
               />
@@ -53,5 +60,8 @@ export class TreeView extends React.PureComponent<TreeViewProps> {
               {children}
             </div>
           );
+        }}
+      </StyleUtilsContext.Consumer>
+    );
   }
 }

packages/redux-devtools-rtk-query-monitor/src/containers/RtkQueryInspector.tsx

@@ -18,7 +18,6 @@ import {
 import { QueryList } from '../components/QueryList';
 import { QueryForm } from '../components/QueryForm';
 import { QueryPreview } from '../components/QueryPreview';
-import { getApiStateOf, getQuerySubscriptionsOf } from '../utils/rtk-query';
 
 type ForwardedMonitorProps<S, A extends Action<unknown>> = Pick<
   LiftedState<S, A, RtkQueryMonitorState>,
@@ -115,26 +114,15 @@ class RtkQueryInspector<S, A extends Action<unknown>> extends PureComponent<
     const {
       styleUtils: { styling },
     } = this.props;
-    const apiStates = this.selectors.selectApiStates(selectorsSource);
     const allVisibleQueries =
       this.selectors.selectAllVisbileQueries(selectorsSource);
 
     const currentQueryInfo =
       this.selectors.selectCurrentQueryInfo(selectorsSource);
 
-    const currentRtkApi =
+    const apiStates = this.selectors.selectApiStates(selectorsSource);
-      this.selectors.selectApiOfCurrentQuery(selectorsSource);
-    const currentQuerySubscriptions = getQuerySubscriptionsOf(
-      currentQueryInfo,
-      apiStates
-    );
 
-    const currentTags = this.selectors.selectCurrentQueryTags(selectorsSource);
+    const hasNoApi = apiStates == null;
-
-    const currentApiStats =
-      this.selectors.selectApiStatsOfCurrentQuery(selectorsSource);
-
-    const hasNoApis = apiStates == null;
 
     return (
       <div
@@ -156,17 +144,15 @@ class RtkQueryInspector<S, A extends Action<unknown>> extends PureComponent<
             selectedQueryKey={selectorsSource.monitorState.selectedQueryKey}
           />
         </div>
-        <QueryPreview
+        <QueryPreview<S>
+          selectorsSource={this.state.selectorsSource}
+          selectors={this.selectors}
           queryInfo={currentQueryInfo}
           selectedTab={selectorsSource.monitorState.selectedPreviewTab}
           onTabChange={this.handleTabChange}
           styling={styling}
-          tags={currentTags}
-          querySubscriptions={currentQuerySubscriptions}
-          apiState={currentRtkApi}
           isWideLayout={isWideLayout}
-          apiStats={currentApiStats}
+          hasNoApis={hasNoApi}
-          hasNoApis={hasNoApis}
         />
       </div>
     );

packages/redux-devtools-rtk-query-monitor/src/containers/mapProps.tsx

@@ -0,0 +1,29 @@
+import React, { ComponentType, ReactNode, Component } from 'react';
+
+interface Mapper<In, Out> {
+  (inProps: In): Out;
+}
+
+interface MapPropsOutput<In, Out> {
+  (comp: ComponentType<Out>): ComponentType<In>;
+}
+
+export function mapProps<In, Out>(
+  mapper: Mapper<In, Out>
+): MapPropsOutput<In, Out> {
+  return function mapPropsHoc(Comp) {
+    class MapPropsHoc extends Component<In> {
+      render(): ReactNode {
+        const mappedProps = mapper(this.props);
+
+        return <Comp {...mappedProps} />;
+      }
+
+      static displayName = `mapProps(${
+        Comp.displayName || Comp.name || 'Component'
+      })`;
+    }
+
+    return MapPropsHoc;
+  };
+}

packages/redux-devtools-rtk-query-monitor/src/selectors.ts

@@ -7,9 +7,11 @@ import {
   RtkQueryTag,
   SelectorsSource,
   RtkQueryProvided,
+  QueryPreviewTabs,
 } from './types';
 import { Comparator, queryComparators } from './utils/comparators';
 import { FilterList, queryListFilters } from './utils/filters';
+import { emptyRecord } from './utils/object';
 import { escapeRegExpSpecialCharacter } from './utils/regexp';
 import {
   getApiStatesOf,
@@ -63,6 +65,14 @@ export interface InspectorSelectors<S> {
     S,
     RtkQueryApiState | null
   >;
+  readonly selectTabCounters: InspectorSelector<
+    S,
+    Record<QueryPreviewTabs, number>
+  >;
+  readonly selectSubscriptionsOfCurrentQuery: InspectorSelector<
+    S,
+    RtkQueryApiState['subscriptions'][string]
+  >;
 }
 
 export function createInspectorSelectors<S>(): InspectorSelectors<S> {
@@ -161,6 +171,17 @@ export function createInspectorSelectors<S>(): InspectorSelectors<S> {
     return selectApiOfCurrentQuery(selectorsSource)?.provided ?? null;
   };
 
+  const selectSubscriptionsOfCurrentQuery = createSelector(
+    [selectApiOfCurrentQuery, selectCurrentQueryInfo],
+    (apiState, queryInfo) => {
+      if (!queryInfo || !apiState) {
+        return emptyRecord;
+      }
+
+      return apiState.subscriptions[queryInfo.queryKey];
+    }
+  );
+
   const selectCurrentQueryTags = createSelector(
     [selectCurrentQueryInfo, selectProvidedOfCurrentQuery],
     getQueryTagsOf
@@ -171,6 +192,21 @@ export function createInspectorSelectors<S>(): InspectorSelectors<S> {
     generateApiStatsOfCurrentQuery
   );
 
+  const selectTabCounters = (
+    selectorsSource: SelectorsSource<S>
+  ): Record<QueryPreviewTabs, number> => {
+    const subscriptions = selectSubscriptionsOfCurrentQuery(selectorsSource);
+    const subsLen = Object.keys(subscriptions ?? {}).length;
+
+    return {
+      [QueryPreviewTabs.queryTags]:
+        selectCurrentQueryTags(selectorsSource).length,
+      [QueryPreviewTabs.querySubscriptions]: subsLen,
+      [QueryPreviewTabs.apiConfig]: 0,
+      [QueryPreviewTabs.queryinfo]: 0,
+    };
+  };
+
   return {
     selectQueryComparator,
     selectApiStates,
@@ -180,6 +216,8 @@ export function createInspectorSelectors<S>(): InspectorSelectors<S> {
     selectCurrentQueryInfo,
     selectCurrentQueryTags,
     selectApiStatsOfCurrentQuery,
+    selectSubscriptionsOfCurrentQuery,
     selectApiOfCurrentQuery,
+    selectTabCounters,
   };
 }

packages/redux-devtools-rtk-query-monitor/src/types.ts

@@ -132,24 +132,10 @@ export interface ApiStats {
   }>;
 }
 
-export interface QueryPreviewTabProps extends StyleUtils {
-  queryInfo: QueryInfo | null;
-  apiState: RtkQueryApiState | null;
-  querySubscriptions: RTKQuerySubscribers | null;
-  isWideLayout: boolean;
-  tags: RtkQueryTag[];
-  apiStats: ApiStats | null;
-}
-
 export interface TabOption<S, P> extends SelectOption<S> {
   component: ComponentType<P>;
 }
 
-export type QueryPreviewTabOption = TabOption<
-  QueryPreviewTabs,
-  QueryPreviewTabProps
->;
-
 /**
  * It is Omit<RequestStatusFlags, 'status'> & { isFetching: boolean; }
  */