Column Resizing Feature Guide

Mantine React Table lets you easily change the default widths (sizes) of columns and has a built-in column resizing draggable handle feature.

Relevant Table Options

#	Type	Default Value	More Info Links
1	'onChange' \| 'onEnd'	'onChange'	MRT Column Resizing Docs

2	Partial<MRT_ColumnDef<TData>>		TanStack Table Core Table Docs

3	boolean		MRT Column Resizing Docs

4	'semantic' \| 'grid'	'semantic'	TODO

5	OnChangeFn<ColumnSizingState>		TanStack Table Column Sizing Docs

6	OnChangeFn<ColumnSizingInfoState>		TanStack Table Column Sizing Docs

Relevant Column Options

#	Type	Default Value
1	boolean

2	number	1000

3	number	40

4	number	180

Relevant State

#	Type	Default Value	More Info Links
1	Record<string, number>	{}	TanStack Table Column Sizing Docs

2	See TanStack Docs	{}	TanStack Table Column Sizing Docs

Change Default Column Widths

Column Size

This was also covered in the Data Columns Guide, but we'll cover it again here.

You can change the width of any column by setting its size option on the column definition. minSize and maxSize are also available to enforce limits during resizing.

const columns = [
  {
    accessorKey: 'id',
    header: 'ID',
    size: 50, //small column
  },
  {
    accessorKey: 'username',
    header: 'Username',
    minSize: 100, //min size enforced during resizing
    maxSize: 200, //max size enforced during resizing
    size: 180, //medium column
  },
  {
    accessorKey: 'email',
    header: 'Email',
    size: 300, //large column
  },
];

You may notice, however, that the column sizes might not change as much as you would expect. This is because the browser treats <th> and <td> elements differently with in a <table> element by default.

You can improve this slightly by changing the table layout to fixed instead of the default auto in the mantineTableProps.

const table = useMantineReactTable({
  columns,
  data,
  mantineTableProps: {
    sx: {
      tableLayout: 'fixed',
    },
  },
});

The columns will still try to increase their width to take up the full width of the table, but the columns that do have a defined size will have their width respected more.

For further reading on how table-layout fixed vs auto works, we recommend reading this blog post by CSS-Tricks.

If you are using either virtualization features or have the layoutMode set to "grid", another option is to turn off flex grow for both the table head and body cells. You can see this down below at the bottom of this page

Default Column

By default, columns will have the following size properties defined:

const table = useMantineReactTable({
  columns,
  data,
  defaultColumn: { minSize: 40, maxSize: 1000, size: 180 }, //units are in px (these are the default values)
});

You can modify the default column widths by setting the defaultColumn table option.

const table = useMantineReactTable({
  columns,
  data,
  defaultColumn: {
    minSize: 20, //allow columns to get smaller than default
    maxSize: 9001, //allow columns to get larger than default
    size: 260, //make columns wider by default
  },
});

Enable Column Resizing Feature

enableColumnResizing is the boolean table option that enables the column resizing feature.

const table = useMantineReactTable({
  columns,
  data,
  enableColumnResizing: true,
});

You can disable specific columns from being resizable by setting the enableResizing column option to false in their respective column definition.

When Column Resizing is enabled, a CSS table-layout: fixed style is automatically added to the <table> element in order to make the browser respect the widths of the columns more. (Unless layoutMode is set to "grid")

Column Resize Mode

The default columnResizeMode is onChange, which means that column resizing will occur immediately as the user drags the column resize handle. If you are running into performance issues because of many other enabled features, you might want to set the columnResizeMode to onEnd instead. This will make the column resizing only occur after the user has finished dragging the column resize handle and released their mouse.

const table = useMantineReactTable({
  columns,
  data,
  enableColumnResizing: true,
  columnResizeMode: 'onEnd',
});

Demo

First Name	Last Name	Email Address	City	Country
Dylan	Murray	dmurray@yopmail.com	East Daphne	USA
Raquel	Kohler	rkholer33@yopmail.com	Columbus	USA
Ervin	Reinger	ereinger@mailinator.com	Toronto	Canada
Brittany	McCullough	bmccullough44@mailinator.com	Lincoln	USA
Branson	Frami	bframi@yopmain.com	New York	USA

Rows per page

1-5 of 5

1
import { useMemo } from 'react';
2
import { MantineReactTable, type MRT_ColumnDef } from 'mantine-react-table';
3
import { data, type Person } from './makeData';
4

5
const Example = () => {
6
  const columns = useMemo<MRT_ColumnDef<Person>[]>(
7
    () => [
8
      {
9
        accessorKey: 'firstName',
10
        header: 'First Name', //uses the default width from defaultColumn prop
11
      },
12
      {
13
        accessorKey: 'lastName',
14
        header: 'Last Name',
15
        enableResizing: false, //disable resizing for this column
16
      },
17
      {
18
        accessorKey: 'email',
19
        header: 'Email Address',
20
        size: 200, //increase the width of this column
21
      },
22
      {
23
        accessorKey: 'city',
24
        header: 'City',
25
        size: 120, //decrease the width of this column
26
      },
27
      {
28
        accessorKey: 'country',
29
        header: 'Country',
30
        size: 100, //decrease the width of this column
31
      },
32
    ],
33
    [],
34
  );
35

36
  return (
37
    <MantineReactTable
38
      columns={columns}
39
      data={data}
40
      //optionally override the default column widths
41
      defaultColumn={{
42
        maxSize: 400,
43
        minSize: 80,
44
        size: 150, //default size is usually 180
45
      }}
46
      enableColumnResizing
47
      columnResizeMode="onChange" //default
48
    />
49
  );
50
};
51

52
export default Example;

1
import { useMemo } from 'react';
2
import { MantineReactTable } from 'mantine-react-table';
3
import { data } from './makeData';
4

5
const Example = () => {
6
  const columns = useMemo(
7
    () => [
8
      {
9
        accessorKey: 'firstName',
10
        header: 'First Name', //uses the default width from defaultColumn prop
11
      },
12
      {
13
        accessorKey: 'lastName',
14
        header: 'Last Name',
15
        enableResizing: false, //disable resizing for this column
16
      },
17
      {
18
        accessorKey: 'email',
19
        header: 'Email Address',
20
        size: 200, //increase the width of this column
21
      },
22
      {
23
        accessorKey: 'city',
24
        header: 'City',
25
        size: 120, //decrease the width of this column
26
      },
27
      {
28
        accessorKey: 'country',
29
        header: 'Country',
30
        size: 100, //decrease the width of this column
31
      },
32
    ],
33
    [],
34
  );
35

36
  return (
37
    <MantineReactTable
38
      columns={columns}
39
      data={data}
40
      //optionally override the default column widths
41
      defaultColumn={{
42
        maxSize: 400,
43
        minSize: 80,
44
        size: 150, //default size is usually 180
45
      }}
46
      enableColumnResizing
47
      columnResizeMode="onChange" //default
48
    />
49
  );
50
};
51

52
export default Example;

Disable Column Growing

If you want to prevent the columns from growing to fill the width of the table, use this flexbox trick when the layoutMode is "grid":

const table = useMantineReactTable({
  columns,
  data,
  enableColumnResizing: true,
  layoutMode: 'grid',
  mantineTableHeadCellProps: {
    sx: {
      flex: '0 0 auto',
    },
  },
  mantineTableBodyCellProps: {
    sx: {
      flex: '0 0 auto',
    },
  },
});

Demo

First Name	Last Name	Email Address
Dylan	Murray	dmurray@yopmail.com
Raquel	Kohler	rkholer33@yopmail.com
Ervin	Reinger	ereinger@mailinator.com
Brittany	McCullough	bmccullough44@mailinator.com
Branson	Frami	bframi@yopmain.com

Rows per page

1-5 of 5

1
import { useMemo } from 'react';
2
import { MantineReactTable, type MRT_ColumnDef } from 'mantine-react-table';
3
import { data, type Person } from './makeData';
4

5
const Example = () => {
6
  const columns = useMemo<MRT_ColumnDef<Person>[]>(
7
    () => [
8
      {
9
        accessorKey: 'firstName',
10
        header: 'First Name',
11
      },
12
      {
13
        accessorKey: 'lastName',
14
        header: 'Last Name',
15
      },
16
      {
17
        accessorKey: 'email',
18
        header: 'Email Address',
19
        size: 300,
20
      },
21
    ],
22
    [],
23
  );
24

25
  return (
26
    <MantineReactTable
27
      columns={columns}
28
      data={data}
29
      enableColumnResizing
30
      layoutMode="grid"
31
      //Disables the default flex-grow behavior of the table cells
32
      mantineTableHeadCellProps={{
33
        sx: {
34
          flex: '0 0 auto',
35
        },
36
      }}
37
      mantineTableBodyCellProps={{
38
        sx: {
39
          flex: '0 0 auto',
40
        },
41
      }}
42
      //
43
    />
44
  );
45
};
46

47
export default Example;

1
import { useMemo } from 'react';
2
import { MantineReactTable } from 'mantine-react-table';
3
import { data } from './makeData';
4

5
const Example = () => {
6
  const columns = useMemo(
7
    () => [
8
      {
9
        accessorKey: 'firstName',
10
        header: 'First Name',
11
      },
12
      {
13
        accessorKey: 'lastName',
14
        header: 'Last Name',
15
      },
16
      {
17
        accessorKey: 'email',
18
        header: 'Email Address',
19
        size: 300,
20
      },
21
    ],
22
    [],
23
  );
24

25
  return (
26
    <MantineReactTable
27
      columns={columns}
28
      data={data}
29
      enableColumnResizing
30
      layoutMode="grid"
31
      //Disables the default flex-grow behavior of the table cells
32
      mantineTableHeadCellProps={{
33
        sx: {
34
          flex: '0 0 auto',
35
        },
36
      }}
37
      mantineTableBodyCellProps={{
38
        sx: {
39
          flex: '0 0 auto',
40
        },
41
      }}
42
      //
43
    />
44
  );
45
};
46

47
export default Example;

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