code · pull · Mar 17, 2026 · Mar 17, 2026 · Mar 17, 2026 · Mar 17, 2026
diff --git a/.env b/.env
@@ -1,6 +1,6 @@
 # Production Build
-BUILD_GRID_VERSION=35.1.0-beta.20260316.108
-BUILD_CHARTS_VERSION=13.1.0-beta.20260316
+BUILD_GRID_VERSION=35.1.0-beta.20260317.135
+BUILD_CHARTS_VERSION=13.1.0-beta.20260317
 ENV=local
 NX_BATCH_MODE=true
 NX_ADD_PLUGINS=false

diff --git a/community-modules/locale/package.json b/community-modules/locale/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@ag-grid-community/locale",
-  "version": "35.1.0-beta.20260316.108",
+  "version": "35.1.0-beta.20260317.135",
   "description": "Localisation Module for AG Grid, providing translations in 31 languages.",
   "main": "./dist/package/main.cjs.js",
   "types": "./dist/types/src/main.d.ts",

diff --git a/community-modules/styles/package.json b/community-modules/styles/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@ag-grid-community/styles",
-  "version": "35.1.0-beta.20260316.108",
+  "version": "35.1.0-beta.20260317.135",
   "description": "AG Grid Styles and Themes",
   "main": "_index.scss",
   "files": [

diff --git a/documentation/ag-grid-docs/package.json b/documentation/ag-grid-docs/package.json
@@ -2,7 +2,7 @@
   "name": "ag-grid-docs",
   "description": "Documentation for AG Grid",
   "type": "module",
-  "version": "35.1.0-beta.20260316.108",
+  "version": "35.1.0-beta.20260317.135",
   "repository": {
     "type": "git",
     "url": "https://github.com/ag-grid/ag-grid.git"
@@ -53,17 +53,17 @@
     "@types/react": "^18.2.47",
     "@types/react-dom": "^18.2.18",
     "@pqina/flip": "^1.8.4",
-    "ag-charts-angular": "13.1.0-beta.20260316",
-    "ag-charts-community": "13.1.0-beta.20260316",
-    "ag-charts-enterprise": "13.1.0-beta.20260316",
-    "ag-charts-types": "13.1.0-beta.20260316",
-    "ag-charts-react": "13.1.0-beta.20260316",
-    "ag-charts-vue3": "13.1.0-beta.20260316",
-    "ag-grid-angular": "35.1.0-beta.20260316.108",
-    "ag-grid-community": "35.1.0-beta.20260316.108",
-    "ag-grid-enterprise": "35.1.0-beta.20260316.108",
-    "ag-grid-react": "35.1.0-beta.20260316.108",
-    "ag-grid-vue3": "35.1.0-beta.20260316.108",
+    "ag-charts-angular": "13.1.0-beta.20260317",
+    "ag-charts-community": "13.1.0-beta.20260317",
+    "ag-charts-enterprise": "13.1.0-beta.20260317",
+    "ag-charts-types": "13.1.0-beta.20260317",
+    "ag-charts-react": "13.1.0-beta.20260317",
+    "ag-charts-vue3": "13.1.0-beta.20260317",
+    "ag-grid-angular": "35.1.0-beta.20260317.135",
+    "ag-grid-community": "35.1.0-beta.20260317.135",
+    "ag-grid-enterprise": "35.1.0-beta.20260317.135",
+    "ag-grid-react": "35.1.0-beta.20260317.135",
+    "ag-grid-vue3": "35.1.0-beta.20260317.135",
     "algoliasearch": "^4.18.0",
     "astro": "5.16.6",
     "cheerio": "^1.0.0",

diff --git a/documentation/ag-grid-docs/src/content/api-documentation/grid-api/api.json b/documentation/ag-grid-docs/src/content/api-documentation/grid-api/api.json
@@ -662,8 +662,24 @@
             "displayName": "Row Expand and Collapse",
             "description": "See [Row Grouping](./grouping-opening-groups/), [Master Detail](./master-detail/) or [Tree Data](./tree-data-opening-groups/) for more information"
         },
-        "expandAll": {},
-        "collapseAll": {},
+        "expandAll": {
+            "more": {
+                "name": "Expanding Groups",
+                "url": "./grouping-opening-groups/#api"
+            }
+        },
+        "collapseAll": {
+            "more": {
+                "name": "Expanding Groups",
+                "url": "./grouping-opening-groups/#api"
+            }
+        },
+        "resetRowGroupExpansion": {
+            "more": {
+                "name": "Reset Group Expansion",
+                "url": "./grouping-opening-groups/#reset-group-expansion"
+            }
+        },
         "setRowNodeExpanded": {
             "more": {
                 "name": "Expand to a Row",

diff --git a/documentation/ag-grid-docs/src/content/api-documentation/grid-options/properties.json b/documentation/ag-grid-docs/src/content/api-documentation/grid-options/properties.json
@@ -1731,8 +1731,18 @@
                 "url": "./server-side-model-pivoting/#supplying-pivot-result-fields-simple"
             }
         },
-        "serverSideSortAllLevels": {},
-        "serverSideEnableClientSideSort": {},
+        "serverSideSortAllLevels": {
+            "more": {
+                "name": "Sorting All Levels",
+                "url": "./server-side-model-sorting/#sorting-all-levels"
+            }
+        },
+        "serverSideEnableClientSideSort": {
+            "more": {
+                "name": "Client-side Sorting",
+                "url": "./server-side-model-sorting/#client-side-sorting"
+            }
+        },
         "serverSideOnlyRefreshFilteredGroups": {
             "more": {
                 "name": "Filters",

diff --git a/.../src/content/docs/grouping-opening-groups/_examples/reset-group-expansion/example.spec.ts b/.../src/content/docs/grouping-opening-groups/_examples/reset-group-expansion/example.spec.ts
@@ -0,0 +1,34 @@
+import { expect, test } from '@utils/grid/test-utils';
+
+test.agExample(import.meta, () => {
+    test.eachFramework('Example', async ({ page, agIdFor }) => {
+        const australiaId = 'row-group-country-Australia';
+        const australia2004Id = 'row-group-country-Australia-year-2004';
+        const unitedStatesId = 'row-group-country-United States';
+
+        // Initial state: isGroupOpenByDefault expands Australia > 2004
+        await expect(agIdFor.autoGroupExpanded(australiaId)).toBeVisible();
+        await expect(agIdFor.autoGroupExpanded(australia2004Id)).toBeVisible();
+        await expect(agIdFor.autoGroupContracted(unitedStatesId)).toBeVisible();
+
+        // Expand All — United States should now be expanded
+        await page.getByRole('button', { name: 'Expand All' }).click();
+        await expect(agIdFor.autoGroupExpanded(unitedStatesId)).toBeVisible();
+
+        // Reset to Defaults — back to isGroupOpenByDefault state
+        await page.getByRole('button', { name: 'Reset to Defaults' }).click();
+        await expect(agIdFor.autoGroupExpanded(australiaId)).toBeVisible();
+        await expect(agIdFor.autoGroupExpanded(australia2004Id)).toBeVisible();
+        await expect(agIdFor.autoGroupContracted(unitedStatesId)).toBeVisible();
+
+        // Collapse All — everything collapsed
+        await page.getByRole('button', { name: 'Collapse All' }).click();
+        await expect(agIdFor.autoGroupContracted(australiaId)).toBeVisible();
+
+        // Reset to Defaults — Australia > 2004 expanded again
+        await page.getByRole('button', { name: 'Reset to Defaults' }).click();
+        await expect(agIdFor.autoGroupExpanded(australiaId)).toBeVisible();
+        await expect(agIdFor.autoGroupExpanded(australia2004Id)).toBeVisible();
+        await expect(agIdFor.autoGroupContracted(unitedStatesId)).toBeVisible();
+    });
+});
diff --git a/...-docs/src/content/docs/grouping-opening-groups/_examples/reset-group-expansion/index.html b/...-docs/src/content/docs/grouping-opening-groups/_examples/reset-group-expansion/index.html
@@ -0,0 +1,8 @@
+<div class="example-wrapper">
+    <div style="margin-bottom: 5px">
+        <button onClick="onBtExpandAll()">Expand All</button>
+        <button onClick="onBtCollapseAll()">Collapse All</button>
+        <button onClick="onBtResetExpansion()">Reset to Defaults</button>
+    </div>
+    <div id="myGrid"></div>
+</div>
diff --git a/...rid-docs/src/content/docs/grouping-opening-groups/_examples/reset-group-expansion/main.ts b/...rid-docs/src/content/docs/grouping-opening-groups/_examples/reset-group-expansion/main.ts
@@ -0,0 +1,64 @@
+import type { GridApi, GridOptions, IsGroupOpenByDefaultParams } from 'ag-grid-community';
+import {
+    ClientSideRowModelApiModule,
+    ClientSideRowModelModule,
+    ModuleRegistry,
+    RowApiModule,
+    ValidationModule,
+    createGrid,
+} from 'ag-grid-community';
+import { RowGroupingModule } from 'ag-grid-enterprise';
+
+ModuleRegistry.registerModules([
+    RowApiModule,
+    ClientSideRowModelModule,
+    ClientSideRowModelApiModule,
+    RowGroupingModule,
+    ...(process.env.NODE_ENV !== 'production' ? [ValidationModule] : []),
+]);
+
+let gridApi: GridApi<IOlympicData>;
+
+const gridOptions: GridOptions<IOlympicData> = {
+    columnDefs: [
+        { field: 'country', rowGroup: true },
+        { field: 'year', rowGroup: true },
+        { field: 'sport' },
+        { field: 'athlete' },
+        { field: 'total' },
+    ],
+    defaultColDef: {
+        flex: 1,
+        minWidth: 100,
+    },
+    autoGroupColumnDef: {
+        minWidth: 200,
+    },
+    isGroupOpenByDefault: (params: IsGroupOpenByDefaultParams) => {
+        const route = params.rowNode.getRoute();
+        const destPath = ['Australia', '2004'];
+        return !!route?.every((item, idx) => destPath[idx] === item);
+    },
+};
+
+function onBtExpandAll() {
+    gridApi!.expandAll();
+}
+
+function onBtCollapseAll() {
+    gridApi!.collapseAll();
+}
+
+function onBtResetExpansion() {
+    gridApi!.resetRowGroupExpansion();
+}
+
+// setup the grid after the page has finished loading
+document.addEventListener('DOMContentLoaded', function () {
+    const gridDiv = document.querySelector<HTMLElement>('#myGrid')!;
+    gridApi = createGrid(gridDiv, gridOptions);
+
+    fetch('https://www.ag-grid.com/example-assets/olympic-winners.json')
+        .then((response) => response.json())
+        .then((data: IOlympicData[]) => gridApi!.setGridOption('rowData', data));
+});
diff --git a/...-docs/src/content/docs/grouping-opening-groups/_examples/reset-group-expansion/styles.css b/...-docs/src/content/docs/grouping-opening-groups/_examples/reset-group-expansion/styles.css
@@ -0,0 +1,10 @@
+.example-wrapper {
+    display: flex;
+    flex-direction: column;
+    height: 100%;
+}
+
+#myGrid {
+    flex: 1 1 0px;
+    width: 100%;
+}
diff --git a/documentation/ag-grid-docs/src/content/docs/grouping-opening-groups/index.mdoc b/documentation/ag-grid-docs/src/content/docs/grouping-opening-groups/index.mdoc
@@ -75,7 +75,7 @@ The row group expansion state can be saved and restored as part of [Grid State](
 {% /note %}
 
 The grid exposes API methods to expand or collapse groups programmatically.
-{% apiDocumentation source="grid-api/api.json" section="rowExpansion" names=["setRowNodeExpanded", "expandAll", "collapseAll"] /%}
+{% apiDocumentation source="grid-api/api.json" section="rowExpansion" names=["setRowNodeExpanded", "expandAll", "collapseAll", "resetRowGroupExpansion"] /%}
 
 ### Expand Row Ancestors
 
@@ -93,3 +93,11 @@ const expandToRow = () => {
   }
 }
 ```
+
+### Reset Group Expansion
+
+After users have expanded or collapsed groups, `resetRowGroupExpansion()` discards all overrides and re-evaluates each group against the configured defaults (`groupDefaultExpanded` or `isGroupOpenByDefault`).
+
+In the example below, the `isGroupOpenByDefault` callback expands the `Australia > 2004` path by default. Try expanding or collapsing groups, then click **Reset to Defaults** to restore the original expansion state.
+
+{% gridExampleRunner title="Reset Group Expansion" name="reset-group-expansion" /%}
diff --git a/documentation/update-algolia-indices/package.json b/documentation/update-algolia-indices/package.json
@@ -1,6 +1,6 @@
 {
   "name": "update-algolia-indices",
-  "version": "35.1.0-beta.20260316.108",
+  "version": "35.1.0-beta.20260317.135",
   "description": "Update algolia indices",
   "main": "src/index.ts",
   "type": "module",

diff --git a/package.json b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "ag-grid",
-  "version": "35.1.0-beta.20260316.108",
+  "version": "35.1.0-beta.20260317.135",
   "license": "MIT",
   "scripts": {
     "compressVideo": "tsx external/ag-website-shared/scripts/compress-video",

diff --git a/packages/ag-grid-angular/package.json b/packages/ag-grid-angular/package.json
@@ -1,6 +1,6 @@
 {
   "name": "ag-grid-angular",
-  "version": "35.1.0-beta.20260316.108",
+  "version": "35.1.0-beta.20260317.135",
   "description": "AG Grid Angular Component",
   "scripts": {
     "clean": "rimraf dist",
@@ -15,7 +15,7 @@
   "module": "./dist/ag-grid-angular/fesm2022/ag-grid-angular.mjs",
   "typings": "./dist/ag-grid-angular/index.d.ts",
   "dependencies": {
-    "ag-grid-community": "35.1.0-beta.20260316.108",
+    "ag-grid-community": "35.1.0-beta.20260317.135",
     "@angular/animations": "^18.0.7",
     "@angular/common": "^18.0.7",
     "@angular/compiler": "^18.0.7",
@@ -27,7 +27,7 @@
     "zone.js": "~0.15.1"
   },
   "devDependencies": {
-    "ag-grid-community": "35.1.0-beta.20260316.108",
+    "ag-grid-community": "35.1.0-beta.20260317.135",
     "@angular-devkit/build-angular": "^18.0.7",
     "@angular/cli": "^18.0.7",
     "@angular/forms": "^18.0.7",

diff --git a/packages/ag-grid-angular/projects/ag-grid-angular/package.json b/packages/ag-grid-angular/projects/ag-grid-angular/package.json
@@ -1,14 +1,14 @@
 {
   "name": "ag-grid-angular",
-  "version": "35.1.0-beta.20260316.108",
+  "version": "35.1.0-beta.20260317.135",
   "description": "AG Grid Angular Component",
   "license": "MIT",
   "peerDependencies": {
     "@angular/common": ">= 18.0.0",
     "@angular/core": ">= 18.0.0"
   },
   "dependencies": {
-    "ag-grid-community": "35.1.0-beta.20260316.108",
+    "ag-grid-community": "35.1.0-beta.20260317.135",
     "tslib": "^2.3.0"
   },
   "repository": {

diff --git a/packages/ag-grid-community/package.json b/packages/ag-grid-community/package.json
@@ -1,6 +1,6 @@
 {
   "name": "ag-grid-community",
-  "version": "35.1.0-beta.20260316.108",
+  "version": "35.1.0-beta.20260317.135",
   "description": "Advanced Data Grid / Data Table supporting Javascript / Typescript / React / Angular / Vue",
   "main": "./dist/package/main.cjs.js",
   "types": "./dist/types/src/main.d.ts",
@@ -119,7 +119,7 @@
   ],
   "homepage": "https://www.ag-grid.com/",
   "dependencies": {
-    "ag-charts-types": "13.1.0-beta.20260316"
+    "ag-charts-types": "13.1.0-beta.20260317"
   },
   "devDependencies": {
     "web-streams-polyfill": "^3.3.2",

diff --git a/packages/ag-grid-community/src/api/gridApi.ts b/packages/ag-grid-community/src/api/gridApi.ts
@@ -529,6 +529,15 @@ export interface _CsrmSsrmSharedGridApi {
      * @agModule `ClientSideRowModelApiModule / ServerSideRowModelApiModule`
      */
     collapseAll(): void;
+
+    /**
+     * Reset all group expansion to defaults, as determined by `groupDefaultExpanded`,
+     * `isGroupOpenByDefault`, or `isServerSideGroupOpenByDefault`.
+     * Any user-initiated expand/collapse overrides are discarded.
+     *
+     * @agModule `ClientSideRowModelApiModule / ServerSideRowModelApiModule`
+     */
+    resetRowGroupExpansion(): void;
 }
 
 export interface _RowModelSharedApi {
@@ -631,7 +640,7 @@ export interface _ColumnResizeApi {
 }
 
 export interface _ColumnMoveApi {
-    /** Moves the column at `fromIdex` to `toIndex`. The column is first removed, then added at the `toIndex` location, thus index locations will change to the right of the column after the removal. */
+    /** Moves the column at `fromIndex` to `toIndex`. The column is first removed, then added at the `toIndex` location, thus index locations will change to the right of the column after the removal. */
     moveColumnByIndex(fromIndex: number, toIndex: number): void;
 
     /** Moves columns to `toIndex`. The columns are first removed, then added at the `toIndex` location, thus index locations will change to the right of the column after the removal. */

diff --git a/packages/ag-grid-community/src/api/gridApiFunctions.ts b/packages/ag-grid-community/src/api/gridApiFunctions.ts
@@ -287,6 +287,7 @@ export const gridApiFunctionsMap: Record<keyof GridApi, ValidationModuleName> =
     ...mod<_CsrmSsrmSharedGridApi>('CsrmSsrmSharedApi', {
         expandAll: 0,
         collapseAll: 0,
+        resetRowGroupExpansion: 0,
     }),
     ...mod<_SsrmInfiniteSharedGridApi>('SsrmInfiniteSharedApi', {
         setRowCount: 0,

diff --git a/packages/ag-grid-community/src/api/rowModelSharedApi.ts b/packages/ag-grid-community/src/api/rowModelSharedApi.ts
@@ -22,3 +22,7 @@ export function resetRowHeights(beans: BeanCollection) {
     }
     beans.rowModel?.resetRowHeights();
 }
+
+export function resetRowGroupExpansion(beans: BeanCollection) {
+    beans.expansionSvc?.resetExpansion();
+}
diff --git a/packages/ag-grid-community/src/api/sharedApiModule.ts b/packages/ag-grid-community/src/api/sharedApiModule.ts
@@ -1,7 +1,13 @@
 import type { _ModuleWithApi } from '../interfaces/iModule';
 import { VERSION } from '../version';
 import type { _CsrmSsrmSharedGridApi, _RowModelSharedApi, _SsrmInfiniteSharedGridApi } from './gridApi';
-import { collapseAll, expandAll, onRowHeightChanged, resetRowHeights } from './rowModelSharedApi';
+import {
+    collapseAll,
+    expandAll,
+    onRowHeightChanged,
+    resetRowGroupExpansion,
+    resetRowHeights,
+} from './rowModelSharedApi';
 import { getCacheBlockState, isLastRowIndexKnown, setRowCount } from './ssrmInfiniteSharedApi';
 
 // these modules are not used in core, but are shared between multiple other modules
@@ -12,7 +18,7 @@ import { getCacheBlockState, isLastRowIndexKnown, setRowCount } from './ssrmInfi
 export const CsrmSsrmSharedApiModule: _ModuleWithApi<_CsrmSsrmSharedGridApi> = {
     moduleName: 'CsrmSsrmSharedApi',
     version: VERSION,
-    apiFunctions: { expandAll, collapseAll },
+    apiFunctions: { expandAll, collapseAll, resetRowGroupExpansion },
 };
 
 /**