---
title: Material UI
pagination_prev: demos/frontend/index
pagination_next: demos/net/index
---

import current from '/version.js';
import CodeBlock from '@theme/CodeBlock';

This demo covers the traditional Material UI Table as well as the MUI Data Grid.

## Material UI Table

The `Table` component abstracts the `<table>` element in HTML. `table_to_book`
can process a `ref` attached to the `Table` element:

```tsx
import TableContainer from '@mui/material/TableContainer';
import Table from '@mui/material/Table';
// ...
// highlight-next-line
import { useRef } from "react";

// ...
export default function BasicTable() {
// highlight-next-line
  const tbl = useRef<HTMLTableElement>(null);
  return ( <>
    <button onClick={() => {
      // highlight-next-line
      const wb = utils.table_to_book(tbl.current);
      writeFileXLSX(wb, "SheetJSMaterialUI.xlsx");
    }}>Export</button>
    <TableContainer {...}>
// highlight-next-line
      <Table {...} ref={tbl}>
      {/* ... material ui table machinations ... */}
      </Table>
    </TableContainer>
  <>);
}
```

#### MUI Table Demo

<details open><summary><b>Complete Example</b> (click to hide)</summary>

:::note

This demo was last run on 2023 May 11 against Material UI 5.13.0 paired with
Emotion 11.11.0

:::

1) Create a new TypeScript `create-react-app` app:

```bash
npx create-react-app sheetjs-mui --template typescript
cd sheetjs-mui
```

2) Install dependencies:

<CodeBlock language="bash">{`\
npm i -S https://cdn.sheetjs.com/xlsx-${current}/xlsx-${current}.tgz @mui/material@5.13.0 @emotion/react@11.11.0 @emotion/styled@11.11.0`}
</CodeBlock>

3) Download [`App.tsx`](pathname:///mui/table/App.tsx) and replace `src/App.tsx`.

```bash
curl -L -o src/App.tsx https://docs.sheetjs.com/mui/table/App.tsx
```

4) Start the development server:

```bash
npm start
```

The script should open the live demo in a web browser. Click the "Export" button
to save the file.  Open the generated file in a spreadsheet editor.

</details>

## Material UI Data Grid

[A complete example is included below.](#muidg-demo)

**Rows and Columns State**

MUI Data Grid state consists of an Array of column metadata and an Array of row
objects. Typically both are defined in state:

```js
// highlight-next-line
import { DataGrid, GridColDef } from "@mui/x-data-grid";

export default function App() {
  const [rows, setRows] = useState([]);
  const [columns, setColumns] = useState([]);

  return ( <DataGrid columns={columns} rows={rows} /> );
}
```

The most generic data representation is an array of arrays. To sate the grid,
columns must be objects whose `field` property is the index converted to string:

```ts
import { WorkSheet, utils } from 'xlsx';
import { GridColDef } from "@mui/x-data-grid";

type Row = any[];
type RowCol = { rows: Row[]; columns: GridColDef[]; };

function ws_to_muidg(ws: WorkSheet): RowCol {
  /* create an array of arrays */
  const rows = utils.sheet_to_json(ws, { header: 1 });

  /* create column array */
  const range = utils.decode_range(ws["!ref"]||"A1");
  const columns = Array.from({ length: range.e.c + 1 }, (_, i) => ({
    field: String(i), // MUIDG will access row["0"], row["1"], etc
    headerName: utils.encode_col(i), // the column labels will be A, B, etc
    editable: true // enable cell editing
  }));

  return { rows, columns }; // these can be fed to setRows / setColumns
}
```

In the other direction, a worksheet can be generated with `aoa_to_sheet`:

:::caution

`x-data-grid` does not properly preserve row array objects, so the row arrays
must be re-created.  The snippet defines a `arrayify` function.

:::

```ts
import { WorkSheet, utils } from 'xlsx';

type Row = any[];

// highlight-start
function arrayify(rows: any[]): Row[] {
  return rows.map(row => {
    var length = Object.keys(row).length;
    for(; length > 0; --length) if(row[length-1] != null) break;
    return Array.from({length, ...row});
  });
}
// highlight-end

function muidg_to_ws(rows: Row[]): WorkSheet {
  return utils.aoa_to_sheet(arrayify(rows));
}
```

**Editing Cells**

The `processRowUpdate` prop receives the new row data, allowing for easy
state mutation:

```tsx
import { GridRowModel } from "@mui/x-data-grid";

export default function App() {
  // ...

  const processRowUpdate = useCallback((rowNew: GridRowModel, rowOld: GridRowModel) => {
    /* scan each column and manually set state entries */
    for(var j = 0; j < columns.length; ++j) if(rowNew[j] != null) {
      rows[rowNew.id][j] = isNaN(+rowNew[j]) ? rowNew[j] : +rowNew[j];
    }
    /* force a state update */
    setRows(rows);
    /* commit the new row */
    return rowNew;
  }, [columns, rows]);

  return ( <DataGrid columns={columns} rows={rows} processRowUpdate={processRowUpdate} /> );
}
```

<!-- spellchecker-disable -->

#### MUIDG Demo

<!-- spellchecker-enable -->

<details open><summary><b>Complete Example</b> (click to hide)</summary>

:::note

This demo was last run on 2023 May 11 against MUI data grid 6.3.1 paired with
Emotion 11.11.0

:::

1) Create a new TypeScript `create-react-app` app:

```bash
npx create-react-app sheetjs-muidg --template typescript
cd sheetjs-muidg
```

2) Install dependencies:

<CodeBlock language="bash">{`\
npm i -S https://cdn.sheetjs.com/xlsx-${current}/xlsx-${current}.tgz @mui/x-data-grid @emotion/react @emotion/styled`}
</CodeBlock>

3) Download [`App.tsx`](pathname:///mui/dg/App.tsx) and replace `src/App.tsx`.

```bash
curl -L -o src/App.tsx https://docs.sheetjs.com/mui/dg/App.tsx
```

4) Start the development server:

```bash
npm start
```

When the page loads, it will fetch and process <https://sheetjs.com/pres.numbers>

</details>