React Example: Column Groups

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import * as React from 'react'
import ReactDOM from 'react-dom/client'

import './index.css'

import {
  createColumnHelper,
  flexRender,
  getCoreRowModel,
  useReactTable,
} from '@tanstack/react-table'

type Person = {
  firstName: string
  lastName: string
  age: number
  visits: number
  status: string
  progress: number
}

const defaultData: Person[] = [
  {
    firstName: 'tanner',
    lastName: 'linsley',
    age: 24,
    visits: 100,
    status: 'In Relationship',
    progress: 50,
  },
  {
    firstName: 'tandy',
    lastName: 'miller',
    age: 40,
    visits: 40,
    status: 'Single',
    progress: 80,
  },
  {
    firstName: 'joe',
    lastName: 'dirte',
    age: 45,
    visits: 20,
    status: 'Complicated',
    progress: 10,
  },
]

const columnHelper = createColumnHelper<Person>()

const columns = [
  columnHelper.group({
    id: 'hello',
    header: () => <span>Hello</span>,
    // footer: props => props.column.id,
    columns: [
      columnHelper.accessor('firstName', {
        cell: info => info.getValue(),
        footer: props => props.column.id,
      }),
      columnHelper.accessor(row => row.lastName, {
        id: 'lastName',
        cell: info => info.getValue(),
        header: () => <span>Last Name</span>,
        footer: props => props.column.id,
      }),
    ],
  }),
  columnHelper.group({
    header: 'Info',
    footer: props => props.column.id,
    columns: [
      columnHelper.accessor('age', {
        header: () => 'Age',
        footer: props => props.column.id,
      }),
      columnHelper.group({
        header: 'More Info',
        columns: [
          columnHelper.accessor('visits', {
            header: () => <span>Visits</span>,
            footer: props => props.column.id,
          }),
          columnHelper.accessor('status', {
            header: 'Status',
            footer: props => props.column.id,
          }),
          columnHelper.accessor('progress', {
            header: 'Profile Progress',
            footer: props => props.column.id,
          }),
        ],
      }),
    ],
  }),
]

function App() {
  const [data, _setData] = React.useState(() => [...defaultData])
  const rerender = React.useReducer(() => ({}), {})[1]

  const table = useReactTable({
    data,
    columns,
    getCoreRowModel: getCoreRowModel(),
  })

  return (
    <div className="p-2">
      <table>
        <thead>
          {table.getHeaderGroups().map(headerGroup => (
            <tr key={headerGroup.id}>
              {headerGroup.headers.map(header => (
                <th key={header.id} colSpan={header.colSpan}>
                  {header.isPlaceholder
                    ? null
                    : flexRender(
                        header.column.columnDef.header,
                        header.getContext()
                      )}
                </th>
              ))}
            </tr>
          ))}
        </thead>
        <tbody>
          {table.getRowModel().rows.map(row => (
            <tr key={row.id}>
              {row.getVisibleCells().map(cell => (
                <td key={cell.id}>
                  {flexRender(cell.column.columnDef.cell, cell.getContext())}
                </td>
              ))}
            </tr>
          ))}
        </tbody>
        <tfoot>
          {table.getFooterGroups().map(footerGroup => (
            <tr key={footerGroup.id}>
              {footerGroup.headers.map(header => (
                <th key={header.id} colSpan={header.colSpan}>
                  {header.isPlaceholder
                    ? null
                    : flexRender(
                        header.column.columnDef.footer,
                        header.getContext()
                      )}
                </th>
              ))}
            </tr>
          ))}
        </tfoot>
      </table>
      <div className="h-4" />
      <button onClick={() => rerender()} className="border p-2">
        Rerender
      </button>
    </div>
  )
}

const rootElement = document.getElementById('root')
if (!rootElement) throw new Error('Failed to find the root element')

ReactDOM.createRoot(rootElement).render(
  <React.StrictMode>
    <App />
  </React.StrictMode>
)

import * as React from 'react'
import ReactDOM from 'react-dom/client'

import './index.css'

import {
  createColumnHelper,
  flexRender,
  getCoreRowModel,
  useReactTable,
} from '@tanstack/react-table'

type Person = {
  firstName: string
  lastName: string
  age: number
  visits: number
  status: string
  progress: number
}

const defaultData: Person[] = [
  {
    firstName: 'tanner',
    lastName: 'linsley',
    age: 24,
    visits: 100,
    status: 'In Relationship',
    progress: 50,
  },
  {
    firstName: 'tandy',
    lastName: 'miller',
    age: 40,
    visits: 40,
    status: 'Single',
    progress: 80,
  },
  {
    firstName: 'joe',
    lastName: 'dirte',
    age: 45,
    visits: 20,
    status: 'Complicated',
    progress: 10,
  },
]

const columnHelper = createColumnHelper<Person>()

const columns = [
  columnHelper.group({
    id: 'hello',
    header: () => <span>Hello</span>,
    // footer: props => props.column.id,
    columns: [
      columnHelper.accessor('firstName', {
        cell: info => info.getValue(),
        footer: props => props.column.id,
      }),
      columnHelper.accessor(row => row.lastName, {
        id: 'lastName',
        cell: info => info.getValue(),
        header: () => <span>Last Name</span>,
        footer: props => props.column.id,
      }),
    ],
  }),
  columnHelper.group({
    header: 'Info',
    footer: props => props.column.id,
    columns: [
      columnHelper.accessor('age', {
        header: () => 'Age',
        footer: props => props.column.id,
      }),
      columnHelper.group({
        header: 'More Info',
        columns: [
          columnHelper.accessor('visits', {
            header: () => <span>Visits</span>,
            footer: props => props.column.id,
          }),
          columnHelper.accessor('status', {
            header: 'Status',
            footer: props => props.column.id,
          }),
          columnHelper.accessor('progress', {
            header: 'Profile Progress',
            footer: props => props.column.id,
          }),
        ],
      }),
    ],
  }),
]

function App() {
  const [data, _setData] = React.useState(() => [...defaultData])
  const rerender = React.useReducer(() => ({}), {})[1]

  const table = useReactTable({
    data,
    columns,
    getCoreRowModel: getCoreRowModel(),
  })

  return (
    <div className="p-2">
      <table>
        <thead>
          {table.getHeaderGroups().map(headerGroup => (
            <tr key={headerGroup.id}>
              {headerGroup.headers.map(header => (
                <th key={header.id} colSpan={header.colSpan}>
                  {header.isPlaceholder
                    ? null
                    : flexRender(
                        header.column.columnDef.header,
                        header.getContext()
                      )}
                </th>
              ))}
            </tr>
          ))}
        </thead>
        <tbody>
          {table.getRowModel().rows.map(row => (
            <tr key={row.id}>
              {row.getVisibleCells().map(cell => (
                <td key={cell.id}>
                  {flexRender(cell.column.columnDef.cell, cell.getContext())}
                </td>
              ))}
            </tr>
          ))}
        </tbody>
        <tfoot>
          {table.getFooterGroups().map(footerGroup => (
            <tr key={footerGroup.id}>
              {footerGroup.headers.map(header => (
                <th key={header.id} colSpan={header.colSpan}>
                  {header.isPlaceholder
                    ? null
                    : flexRender(
                        header.column.columnDef.footer,
                        header.getContext()
                      )}
                </th>
              ))}
            </tr>
          ))}
        </tfoot>
      </table>
      <div className="h-4" />
      <button onClick={() => rerender()} className="border p-2">
        Rerender
      </button>
    </div>
  )
}

const rootElement = document.getElementById('root')
if (!rootElement) throw new Error('Failed to find the root element')

ReactDOM.createRoot(rootElement).render(
  <React.StrictMode>
    <App />
  </React.StrictMode>
)