Agent Skills: MUI X DataGrid

MUI X DataGrid

Package Tiers

| Package | Import | Features | |---------|--------|---------| | @mui/x-data-grid | DataGrid | Sorting, filtering, pagination, export (free, MIT) | | @mui/x-data-grid-pro | DataGridPro | Column pinning, row grouping, master-detail, infinite scroll | | @mui/x-data-grid-premium | DataGridPremium | Aggregation, pivoting, Excel export, row spanning |

Always import GridColDef and the grid from the same package.

Basic Setup

import { DataGrid, GridColDef } from '@mui/x-data-grid';
import Chip from '@mui/material/Chip';
import Box from '@mui/material/Box';

interface User {
  id: number;
  name: string;
  email: string;
  role: string;
  createdAt: string;
  active: boolean;
}

const columns: GridColDef<User>[] = [
  { field: 'id', headerName: 'ID', width: 80 },
  { field: 'name', headerName: 'Name', width: 180, flex: 1 },
  { field: 'email', headerName: 'Email', width: 220 },
  { field: 'role', headerName: 'Role', width: 120 },
  {
    field: 'createdAt',
    headerName: 'Created',
    width: 140,
    type: 'date',
    valueGetter: (value) => new Date(value),        // convert string to Date
    valueFormatter: (value: Date) =>
      value?.toLocaleDateString('en-US', { dateStyle: 'medium' }),
  },
  {
    field: 'active',
    headerName: 'Status',
    width: 100,
    type: 'boolean',
    renderCell: ({ value }) => (
      <Chip
        label={value ? 'Active' : 'Inactive'}
        color={value ? 'success' : 'default'}
        size="small"
      />
    ),
  },
];

function UsersGrid({ rows }: { rows: User[] }) {
  return (
    <Box sx={{ height: 600, width: '100%' }}>
      <DataGrid
        rows={rows}
        columns={columns}
        initialState={{
          pagination: { paginationModel: { pageSize: 25 } },
          sorting: { sortModel: [{ field: 'createdAt', sort: 'desc' }] },
        }}
        pageSizeOptions={[10, 25, 50, 100]}
        checkboxSelection
        disableRowSelectionOnClick
        density="compact"                   // 'compact' | 'standard' | 'comfortable'
        getRowId={(row) => row.id}          // only needed if row.id is not the key
      />
    </Box>
  );
}

GridColDef Reference

const col: GridColDef = {
  field: 'fieldName',          // must match row object key
  headerName: 'Display Name',
  description: 'Tooltip on header hover',
  width: 150,                  // fixed px width
  minWidth: 100,
  maxWidth: 300,
  flex: 1,                     // fill remaining space (like CSS flex-grow)
  type: 'string',              // 'string' | 'number' | 'date' | 'dateTime' | 'boolean' | 'singleSelect' | 'actions'
  align: 'left',               // 'left' | 'right' | 'center'
  headerAlign: 'left',
  sortable: true,
  filterable: true,
  hideable: true,
  pinnable: true,              // Pro/Premium only
  editable: false,

  // Transform raw value for display/sorting (not for renderCell)
  valueGetter: (value, row) => `${row.firstName} ${row.lastName}`,

  // Format value for display (runs after valueGetter)
  valueFormatter: (value: number) => `$${value.toFixed(2)}`,

  // Custom cell renderer — receives GridRenderCellParams
  renderCell: (params) => (
    <Box sx={{ display: 'flex', alignItems: 'center', gap: 1 }}>
      <Avatar src={params.row.avatar} sx={{ width: 24, height: 24 }} />
      {params.value}
    </Box>
  ),

  // Custom header renderer
  renderHeader: (params) => (
    <strong>{params.colDef.headerName} <span aria-hidden>*</span></strong>
  ),
};

Actions column

import { GridActionsCellItem, GridColDef } from '@mui/x-data-grid';

const actionsColumn: GridColDef = {
  field: 'actions',
  type: 'actions',
  headerName: 'Actions',
  width: 100,
  getActions: (params) => [
    <GridActionsCellItem
      key="edit"
      icon={<EditIcon />}
      label="Edit"
      onClick={() => handleEdit(params.row)}
    />,
    <GridActionsCellItem
      key="delete"
      icon={<DeleteIcon />}
      label="Delete"
      onClick={() => handleDelete(params.id)}
      showInMenu           // show in overflow menu instead of inline
    />,
  ],
};

Client-Side Sorting, Filtering, Pagination

Client-side is the default. All three happen automatically — just provide rows and columns. Customise with initialState or controlled props.

import { GridSortModel, GridFilterModel } from '@mui/x-data-grid';

// Controlled sort
const [sortModel, setSortModel] = React.useState<GridSortModel>([
  { field: 'name', sort: 'asc' },
]);

<DataGrid
  rows={rows}
  columns={columns}
  sortModel={sortModel}
  onSortModelChange={setSortModel}
/>

// Controlled filter
const [filterModel, setFilterModel] = React.useState<GridFilterModel>({
  items: [{ field: 'role', operator: 'equals', value: 'admin' }],
});

<DataGrid
  rows={rows}
  columns={columns}
  filterModel={filterModel}
  onFilterModelChange={setFilterModel}
/>

Server-Side Pagination, Sorting, and Filtering

Set paginationMode, filterMode, and sortingMode to "server". Provide rowCount so the grid knows total records. Fetch data whenever the model changes.

import {
  DataGrid,
  GridSortModel,
  GridFilterModel,
  GridPaginationModel,
} from '@mui/x-data-grid';

function ServerGrid() {
  const [rows, setRows] = React.useState<User[]>([]);
  const [rowCount, setRowCount] = React.useState(0);
  const [loading, setLoading] = React.useState(false);

  const [paginationModel, setPaginationModel] = React.useState<GridPaginationModel>({
    page: 0,
    pageSize: 25,
  });
  const [sortModel, setSortModel] = React.useState<GridSortModel>([]);
  const [filterModel, setFilterModel] = React.useState<GridFilterModel>({ items: [] });

  // Fetch whenever any model changes
  React.useEffect(() => {
    let active = true;
    setLoading(true);

    fetchUsers({
      page: paginationModel.page,
      pageSize: paginationModel.pageSize,
      sort: sortModel,
      filter: filterModel,
    }).then((result) => {
      if (active) {
        setRows(result.rows);
        setRowCount(result.total);
        setLoading(false);
      }
    });

    return () => { active = false; };
  }, [paginationModel, sortModel, filterModel]);

  return (
    <Box sx={{ height: 600, width: '100%' }}>
      <DataGrid
        rows={rows}
        columns={columns}
        rowCount={rowCount}
        loading={loading}
        // Server-side modes
        paginationMode="server"
        sortingMode="server"
        filterMode="server"
        // Controlled models
        paginationModel={paginationModel}
        onPaginationModelChange={setPaginationModel}
        sortModel={sortModel}
        onSortModelChange={setSortModel}
        filterModel={filterModel}
        onFilterModelChange={(model) => {
          setFilterModel(model);
          // Reset to page 0 on filter change
          setPaginationModel((prev) => ({ ...prev, page: 0 }));
        }}
        pageSizeOptions={[25, 50, 100]}
        keepNonExistentRowsSelected     // preserve selection across pages
      />
    </Box>
  );
}

Editable Grid

import {
  DataGrid,
  GridRowId,
  GridRowModel,
  GridRowModesModel,
  GridRowModes,
  GridRowEditStopReasons,
  GridEventListener,
} from '@mui/x-data-grid';

function EditableGrid({ initialRows }: { initialRows: User[] }) {
  const [rows, setRows] = React.useState(initialRows);
  const [rowModesModel, setRowModesModel] = React.useState<GridRowModesModel>({});

  const handleRowEditStop: GridEventListener<'rowEditStop'> = (params, event) => {
    if (params.reason === GridRowEditStopReasons.rowFocusOut) {
      event.defaultMuiPrevented = true; // don't save on blur, only on Enter
    }
  };

  const handleSave = (id: GridRowId) => {
    setRowModesModel((prev) => ({
      ...prev,
      [id]: { mode: GridRowModes.View },
    }));
  };

  const handleCancel = (id: GridRowId) => {
    setRowModesModel((prev) => ({
      ...prev,
      [id]: { mode: GridRowModes.View, ignoreModifications: true },
    }));
  };

  // Called when a row exits edit mode — validate and persist here
  const processRowUpdate = React.useCallback(
    async (updatedRow: GridRowModel, originalRow: GridRowModel) => {
      if (!updatedRow.name) throw new Error('Name is required');
      const saved = await api.updateUser(updatedRow);
      setRows((prev) => prev.map((r) => (r.id === saved.id ? saved : r)));
      return saved;
    },
    [],
  );

  const handleProcessRowUpdateError = (error: Error) => {
    showSnackbar(error.message, 'error');
  };

  const editColumns: GridColDef[] = [
    { field: 'name', headerName: 'Name', flex: 1, editable: true },
    {
      field: 'role',
      headerName: 'Role',
      width: 140,
      editable: true,
      type: 'singleSelect',
      valueOptions: ['admin', 'editor', 'viewer'],
    },
    {
      field: 'actions',
      type: 'actions',
      width: 100,
      getActions: ({ id }) => {
        const isEditing = rowModesModel[id]?.mode === GridRowModes.Edit;
        if (isEditing) {
          return [
            <GridActionsCellItem key="save" icon={<SaveIcon />} label="Save" onClick={() => handleSave(id)} />,
            <GridActionsCellItem key="cancel" icon={<CancelIcon />} label="Cancel" onClick={() => handleCancel(id)} />,
          ];
        }
        return [
          <GridActionsCellItem
            key="edit"
            icon={<EditIcon />}
            label="Edit"
            onClick={() =>
              setRowModesModel((prev) => ({
                ...prev,
                [id]: { mode: GridRowModes.Edit, fieldToFocus: 'name' },
              }))
            }
          />,
        ];
      },
    },
  ];

  return (
    <Box sx={{ height: 500 }}>
      <DataGrid
        rows={rows}
        columns={editColumns}
        editMode="row"
        rowModesModel={rowModesModel}
        onRowModesModelChange={setRowModesModel}
        onRowEditStop={handleRowEditStop}
        processRowUpdate={processRowUpdate}
        onProcessRowUpdateError={handleProcessRowUpdateError}
      />
    </Box>
  );
}

Custom renderCell Examples

import LinearProgress from '@mui/material/LinearProgress';
import Link from '@mui/material/Link';

// Progress bar cell
const progressCol: GridColDef = {
  field: 'progress',
  headerName: 'Progress',
  width: 150,
  renderCell: ({ value }) => (
    <Box sx={{ width: '100%', display: 'flex', alignItems: 'center', gap: 1 }}>
      <LinearProgress
        variant="determinate"
        value={value}
        sx={{ flex: 1, height: 8, borderRadius: 4 }}
      />
      <Typography variant="caption">{value}%</Typography>
    </Box>
  ),
};

// Link cell
const nameCol: GridColDef = {
  field: 'name',
  renderCell: ({ value, row }) => (
    <Link component={RouterLink} to={`/users/${row.id}`} underline="hover">
      {value}
    </Link>
  ),
};

// Multi-line cell (needs rowHeight adjustment on the grid)
const descriptionCol: GridColDef = {
  field: 'description',
  width: 300,
  renderCell: ({ value }) => (
    <Box sx={{ py: 1 }}>
      <Typography variant="body2" sx={{ whiteSpace: 'normal', lineHeight: 1.4 }}>
        {value}
      </Typography>
    </Box>
  ),
};

Custom Toolbar

import {
  GridToolbarContainer,
  GridToolbarColumnsButton,
  GridToolbarFilterButton,
  GridToolbarDensitySelector,
  GridToolbarExport,
  GridToolbarQuickFilter,
} from '@mui/x-data-grid';
import Stack from '@mui/material/Stack';
import Button from '@mui/material/Button';

function CustomToolbar({ onAddRow }: { onAddRow: () => void }) {
  return (
    <GridToolbarContainer sx={{ justifyContent: 'space-between', px: 1, py: 0.5 }}>
      <Stack direction="row" spacing={0.5}>
        <GridToolbarColumnsButton />
        <GridToolbarFilterButton />
        <GridToolbarDensitySelector />
        <GridToolbarExport
          csvOptions={{ fileName: 'users-export', utf8WithBom: true }}
          printOptions={{ hideFooter: true }}
        />
      </Stack>
      <Stack direction="row" spacing={1} alignItems="center">
        <GridToolbarQuickFilter
          quickFilterParser={(input) => input.split(',').map((s) => s.trim())}
          debounceMs={300}
        />
        <Button size="small" variant="contained" startIcon={<AddIcon />} onClick={onAddRow}>
          Add row
        </Button>
      </Stack>
    </GridToolbarContainer>
  );
}

// Pass to DataGrid
<DataGrid
  slots={{ toolbar: CustomToolbar }}
  slotProps={{ toolbar: { onAddRow: handleAddRow } }}
/>

Column Pinning (Pro/Premium)

import { DataGridPro } from '@mui/x-data-grid-pro';

<DataGridPro
  rows={rows}
  columns={columns}
  initialState={{
    pinnedColumns: { left: ['name'], right: ['actions'] },
  }}
  // Or controlled:
  pinnedColumns={pinnedColumns}
  onPinnedColumnsChange={setPinnedColumns}
/>

Performance Tips

1. Memoize columns — define outside the component or with React.useMemo. Re-creating the array on every render causes unnecessary column re-registration.

// Bad: new array every render
function MyGrid({ data }) {
  const columns: GridColDef[] = [ ... ]; // recreated each render
  return <DataGrid rows={data} columns={columns} />;
}

// Good: stable reference
const COLUMNS: GridColDef[] = [ ... ]; // defined at module scope

function MyGrid({ data }) {
  return <DataGrid rows={data} columns={COLUMNS} />;
}

2. Use getRowId only when rows do not have an id field. Providing it unnecessarily adds overhead.

3. Virtualization is on by default and handles thousands of rows efficiently. Do not disable it (disableVirtualization) in production.

4. rowBuffer (default 3) controls how many off-screen rows to render. Increase for smoother scrolling on fast machines; decrease to reduce DOM nodes on slow devices.

<DataGrid rowBuffer={5} columnBuffer={3} />

5. Server-side for large datasets — use paginationMode="server" when rowCount exceeds ~10,000 rows to avoid loading the full dataset into memory.

6. keepNonExistentRowsSelected prevents selection loss during server-side pagination page changes.

Pro / Premium Features Reference

Column Pinning (Pro)

<DataGridPro
  initialState={{
    pinnedColumns: { left: ['id', 'name'], right: ['actions'] },
  }}
/>

// Programmatic
apiRef.current.pinColumn('id', 'left');
apiRef.current.unpinColumn('id');

Row Grouping (Premium)

<DataGridPremium
  initialState={{
    rowGrouping: { model: ['category', 'status'] },
  }}
  groupingColDef={{
    headerName: 'Group',
    width: 200,
  }}
/>

Aggregation (Premium)

<DataGridPremium
  initialState={{
    aggregation: {
      model: {
        revenue: 'sum',
        rating: 'avg',
        orders: 'max',
      },
    },
  }}
/>

Built-in functions: sum, avg, min, max, size (count).

Master-Detail (Pro)

<DataGridPro
  getDetailPanelContent={({ row }) => (
    <Box sx={{ p: 2 }}>
      <Typography variant="h6">Orders for {row.name}</Typography>
      <DataGrid rows={row.orders} columns={orderColumns} autoHeight />
    </Box>
  )}
  getDetailPanelHeight={() => 'auto'}
/>

Excel Export (Premium)

// Toolbar button
<DataGridPremium slots={{ toolbar: GridToolbar }} />

// Programmatic
apiRef.current.exportDataAsExcel({
  fileName: 'report',
  includeHeaders: true,
  utf8WithBom: true,
});

Cell Selection (Premium)

<DataGridPremium
  cellSelection
  onCellSelectionModelChange={(model) => {
    // model: Record<GridRowId, Record<string, boolean>>
    console.log('Selected cells:', model);
  }}
/>

Clipboard Paste (Premium)

<DataGridPremium
  cellSelection
  ignoreValueFormatterDuringExport
  splitClipboardPastedText={(text) =>
    text.split('\n').map((row) => row.split('\t'))
  }
/>

Header Filters (Pro)

<DataGridPro
  headerFilters
  slots={{
    headerFilterMenu: null,  // hide filter menu icon
  }}
/>

Custom Filter Operators

const ratingAboveOperator: GridFilterOperator<any, number> = {
  label: 'Above',
  value: 'above',
  getApplyFilterFn: (filterItem) => {
    if (!filterItem.value) return null;
    return (value) => Number(value) > Number(filterItem.value);
  },
  InputComponent: GridFilterInputValue,
};

const columns: GridColDef[] = [
  {
    field: 'rating',
    type: 'number',
    filterOperators: [...getGridNumericOperators(), ratingAboveOperator],
  },
];

Server-Side Data Source (Pro)

The GridDataSource API (v7+) replaces manual server-side patterns:

const dataSource: GridDataSource = {
  getRows: async (params) => {
    const { paginationModel, sortModel, filterModel } = params;
    const response = await fetch('/api/data', {
      method: 'POST',
      body: JSON.stringify({
        page: paginationModel.page,
        pageSize: paginationModel.pageSize,
        sort: sortModel[0],
        filters: filterModel.items,
      }),
    });
    const { rows, totalCount } = await response.json();
    return { rows, rowCount: totalCount };
  },
};

<DataGridPro
  dataSource={dataSource}
  paginationModel={{ page: 0, pageSize: 25 }}
  dataSourceCache={null}      // disable caching
  // or: dataSourceCache={{ ttl: 60_000 }}  // 60s cache
/>

Row Reordering (Pro)

<DataGridPro
  rowReordering
  onRowOrderChange={(params) => {
    // params.row, params.oldIndex, params.targetIndex
    updateOrder(params.row.id, params.targetIndex);
  }}
/>

Tree Data (Pro)

<DataGridPro
  treeData
  getTreeDataPath={(row) => row.path}  // e.g., ['Company', 'Engineering', 'Frontend']
  groupingColDef={{
    headerName: 'Organization',
    width: 300,
  }}
/>

Tier Quick Reference

| Feature | Community | Pro | Premium | |---------|:---------:|:---:|:-------:| | Sorting, filtering, pagination | ✓ | ✓ | ✓ | | Inline editing | ✓ | ✓ | ✓ | | CSV export | ✓ | ✓ | ✓ | | Column resizing/reordering | — | ✓ | ✓ | | Column pinning | — | ✓ | ✓ | | Row reordering | — | ✓ | ✓ | | Tree data | — | ✓ | ✓ | | Master-detail | — | ✓ | ✓ | | Header filters | — | ✓ | ✓ | | Lazy loading | — | ✓ | ✓ | | Server-side data source | — | ✓ | ✓ | | Row grouping | — | — | ✓ | | Aggregation | — | — | ✓ | | Excel export | — | — | ✓ | | Cell selection | — | — | ✓ | | Clipboard paste | — | — | ✓ |

Community Tier — Advanced Recipes

These powerful patterns work with the free @mui/x-data-grid (MIT).

Detail Panels — Single Open at a Time

const [expandedRowId, setExpandedRowId] = useState<GridRowId | null>(null);

<DataGrid
  rows={rows}
  columns={columns}
  getDetailPanelContent={({ row }) => (
    <Box sx={{ p: 2 }}>
      <Typography variant="h6">{row.name}</Typography>
      <Typography color="text.secondary">{row.description}</Typography>
    </Box>
  )}
  getDetailPanelHeight={() => 'auto'}
  detailPanelExpandedRowIds={expandedRowId ? [expandedRowId] : []}
  onDetailPanelExpandedRowIdsChange={(ids) => {
    // Only keep the last clicked — single panel open at a time
    const newId = ids.find((id) => id !== expandedRowId);
    setExpandedRowId(newId ?? null);
  }}
/>

Expand/Collapse All Detail Panels

const apiRef = useGridApiRef();

<Button onClick={() => {
  const allIds = rows.map((r) => r.id);
  apiRef.current.setExpandedDetailPanels(new Set(allIds));
}}>
  Expand All
</Button>
<Button onClick={() => apiRef.current.setExpandedDetailPanels(new Set())}>
  Collapse All
</Button>

<DataGrid apiRef={apiRef} rows={rows} columns={columns} ... />

Custom Edit Components — Linked Selects

When changing one field should update another's options (e.g., Type → Account):

function LinkedSelectEditCell({ id, field, api, row }: GridRenderEditCellParams) {
  // Account options depend on the selected Type
  const typeValue = row.type; // current type in the row
  const accountOptions = useMemo(
    () => getAccountsForType(typeValue),
    [typeValue],
  );

  return (
    <Select
      value={row.account ?? ''}
      onChange={(e) => api.setEditCellValue({ id, field, value: e.target.value })}
      fullWidth
      size="small"
    >
      {accountOptions.map((opt) => (
        <MenuItem key={opt.value} value={opt.value}>{opt.label}</MenuItem>
      ))}
    </Select>
  );
}

const columns: GridColDef[] = [
  {
    field: 'type',
    headerName: 'Type',
    editable: true,
    type: 'singleSelect',
    valueOptions: ['Income', 'Expense', 'Transfer'],
  },
  {
    field: 'account',
    headerName: 'Account',
    editable: true,
    renderEditCell: (params) => <LinkedSelectEditCell {...params} />,
  },
];

Bulk Editing — Save/Discard Pattern

Collect edits locally, then batch-commit to the server:

function BulkEditGrid({ rows: initialRows, columns }) {
  const [pendingChanges, setPendingChanges] = useState<Map<GridRowId, any>>(new Map());
  const [deletedIds, setDeletedIds] = useState<Set<GridRowId>>(new Set());

  // Merge pending changes into display rows
  const displayRows = useMemo(
    () => initialRows
      .filter((r) => !deletedIds.has(r.id))
      .map((r) => (pendingChanges.has(r.id) ? { ...r, ...pendingChanges.get(r.id) } : r)),
    [initialRows, pendingChanges, deletedIds],
  );

  const processRowUpdate = useCallback((newRow: any, oldRow: any) => {
    setPendingChanges((prev) => new Map(prev).set(newRow.id, newRow));
    return newRow; // optimistic — don't call API yet
  }, []);

  const handleSave = async () => {
    // Batch all changes to server
    await fetch('/api/users/bulk', {
      method: 'POST',
      headers: { 'Content-Type': 'application/json' },
      body: JSON.stringify({
        updates: Array.from(pendingChanges.values()),
        deletes: Array.from(deletedIds),
      }),
    });
    setPendingChanges(new Map());
    setDeletedIds(new Set());
  };

  const handleDiscard = () => {
    setPendingChanges(new Map());
    setDeletedIds(new Set());
  };

  const hasChanges = pendingChanges.size > 0 || deletedIds.size > 0;

  return (
    <>
      <Box sx={{ display: 'flex', gap: 1, mb: 1 }}>
        <Button variant="contained" disabled={!hasChanges} onClick={handleSave}>
          Save ({pendingChanges.size} edits, {deletedIds.size} deletes)
        </Button>
        <Button disabled={!hasChanges} onClick={handleDiscard}>Discard</Button>
      </Box>
      <DataGrid
        rows={displayRows}
        columns={columns}
        editMode="row"
        processRowUpdate={processRowUpdate}
      />
    </>
  );
}

Conditional Row Styling

<DataGrid
  rows={rows}
  columns={columns}
  getRowClassName={(params) => {
    if (params.row.status === 'overdue') return 'row-overdue';
    if (params.row.isAggregate) return 'row-aggregate';
    return '';
  }}
  sx={{
    '& .row-overdue': {
      bgcolor: 'error.light',
      '&:hover': { bgcolor: 'error.main', color: 'error.contrastText' },
    },
    '& .row-aggregate': {
      fontWeight: 700,
      bgcolor: 'action.hover',
    },
    // Alternate row backgrounds
    '& .MuiDataGrid-row:nth-of-type(even)': {
      bgcolor: 'action.hover',
    },
    // Remove focus outline
    '& .MuiDataGrid-cell:focus, & .MuiDataGrid-columnHeader:focus': {
      outline: 'none',
    },
    // Custom selection color
    '& .MuiDataGrid-row.Mui-selected': {
      bgcolor: 'primary.light',
      '&:hover': { bgcolor: 'primary.main', color: 'primary.contrastText' },
    },
  }}
/>

Action Column with Row Operations

const columns: GridColDef[] = [
  // ... data columns
  {
    field: 'actions',
    headerName: 'Actions',
    type: 'actions',
    width: 120,
    getActions: (params) => [
      <GridActionsCellItem
        icon={<EditIcon />}
        label="Edit"
        onClick={() => handleEdit(params.row)}
      />,
      <GridActionsCellItem
        icon={<DeleteIcon />}
        label="Delete"
        onClick={() => handleDelete(params.id)}
        showInMenu  // moves to "..." overflow menu
      />,
      <GridActionsCellItem
        icon={<ContentCopyIcon />}
        label="Duplicate"
        onClick={() => handleDuplicate(params.row)}
        showInMenu
      />,
    ],
  },
];

Custom Filter Operators

// "Overdue by X days" custom operator
const overdueOperator: GridFilterOperator = {
  label: 'Overdue by (days)',
  value: 'overdueByDays',
  getApplyFilterFn: (filterItem) => {
    if (!filterItem.value) return null;
    const days = Number(filterItem.value);
    const cutoff = new Date();
    cutoff.setDate(cutoff.getDate() - days);
    return (value) => {
      if (!value) return false;
      return new Date(value) < cutoff;
    };
  },
  InputComponent: GridFilterInputValue,
  InputComponentProps: { type: 'number' },
};

// "Is any of" multi-value operator
const isAnyOfOperator: GridFilterOperator = {
  label: 'Is any of',
  value: 'isAnyOf',
  getApplyFilterFn: (filterItem) => {
    if (!filterItem.value?.length) return null;
    const values = new Set(filterItem.value);
    return (value) => values.has(value);
  },
  InputComponent: MultiValueFilterInput, // your custom multi-select input
};

const columns: GridColDef[] = [
  {
    field: 'dueDate',
    headerName: 'Due Date',
    type: 'date',
    filterOperators: [...getGridDateOperators(), overdueOperator],
  },
  {
    field: 'status',
    headerName: 'Status',
    filterOperators: [...getGridStringOperators(), isAnyOfOperator],
  },
];

"Always Show Selected" Filter Wrapper

Keep selected rows visible even when they don't match the active filter:

function wrapFilterToKeepSelected(
  operator: GridFilterOperator,
  selectedIds: Set<GridRowId>,
): GridFilterOperator {
  return {
    ...operator,
    getApplyFilterFn: (filterItem, column) => {
      const baseFn = operator.getApplyFilterFn(filterItem, column);
      if (!baseFn) return null;
      return (value, row) => {
        if (selectedIds.has(row.id)) return true; // always show selected
        return baseFn(value, row);
      };
    },
  };
}

Custom Detail Panel Toggle Column (Pro)

Replace the default chevron with your own toggle button:

import {
  GRID_DETAIL_PANEL_TOGGLE_COL_DEF,
  useGridApiContext,
} from '@mui/x-data-grid-pro';

function DetailToggleCell({ id }: { id: GridRowId }) {
  const apiRef = useGridApiContext();
  const isExpanded = apiRef.current.getExpandedDetailPanels().has(id);

  return (
    <IconButton
      size="small"
      aria-label={isExpanded ? 'collapse' : 'expand'}
      onClick={(e) => {
        e.stopPropagation();
        const expanded = new Set(apiRef.current.getExpandedDetailPanels());
        isExpanded ? expanded.delete(id) : expanded.add(id);
        apiRef.current.setExpandedDetailPanels(expanded);
      }}
    >
      {isExpanded ? <ExpandLessIcon /> : <ExpandMoreIcon />}
    </IconButton>
  );
}

const columns: GridColDef[] = [
  {
    ...GRID_DETAIL_PANEL_TOGGLE_COL_DEF,
    renderCell: (params) => <DetailToggleCell id={params.id} />,
  },
  // ... other columns
];

Toggle Detail on Row Click

<DataGridPro
  apiRef={apiRef}
  rows={rows}
  columns={columns}
  onRowClick={(params, event) => {
    // Skip if clicking inside a button or link
    if ((event.target as HTMLElement).closest('button, a, [data-no-toggle]')) return;

    const expanded = new Set(apiRef.current.getExpandedDetailPanels());
    expanded.has(params.id) ? expanded.delete(params.id) : expanded.add(params.id);
    apiRef.current.setExpandedDetailPanels(expanded);
  }}
  getDetailPanelContent={({ row }) => <RowDetail row={row} />}
  getDetailPanelHeight={() => 'auto'}
/>

Form Inside Detail Panel (Master-Detail Editing)

Embed a full edit form inside the detail panel instead of inline row editing:

function DetailFormPanel({ row }: { row: any }) {
  const apiRef = useGridApiContext();

  return (
    <Box sx={{ p: 2, maxWidth: 600 }}>
      <EntityForm
        metadata={userMetadata}
        initialValues={row}
        onSubmit={async (data) => {
          await fetch(`/api/users/${row.id}`, {
            method: 'PUT',
            headers: { 'Content-Type': 'application/json' },
            body: JSON.stringify(data),
          });
          apiRef.current.updateRows([data]); // refresh row in grid
          // Collapse the panel after save
          const expanded = new Set(apiRef.current.getExpandedDetailPanels());
          expanded.delete(row.id);
          apiRef.current.setExpandedDetailPanels(expanded);
        }}
        onCancel={() => {
          const expanded = new Set(apiRef.current.getExpandedDetailPanels());
          expanded.delete(row.id);
          apiRef.current.setExpandedDetailPanels(expanded);
        }}
      />
    </Box>
  );
}

<DataGridPro
  apiRef={apiRef}
  rows={rows}
  columns={columns}
  getDetailPanelContent={({ row }) => <DetailFormPanel row={row} />}
  getDetailPanelHeight={() => 'auto'}
/>

Expand/Collapse All from Header

function ExpandAllHeader() {
  const apiRef = useGridApiContext();
  const expanded = apiRef.current.getExpandedDetailPanels();
  const allExpanded = expanded.size === rows.length;

  return (
    <IconButton
      size="small"
      aria-label={allExpanded ? 'collapse all' : 'expand all'}
      onClick={() => {
        if (allExpanded) {
          apiRef.current.setExpandedDetailPanels(new Set());
        } else {
          apiRef.current.setExpandedDetailPanels(new Set(rows.map((r) => r.id)));
        }
      }}
    >
      {allExpanded ? <UnfoldLessIcon /> : <UnfoldMoreIcon />}
    </IconButton>
  );
}

const columns: GridColDef[] = [
  {
    ...GRID_DETAIL_PANEL_TOGGLE_COL_DEF,
    renderHeader: () => <ExpandAllHeader />,
    renderCell: (params) => <DetailToggleCell id={params.id} />,
  },
  // ...
];