React Example: Expanding

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import React, { HTMLProps } from 'react'
import ReactDOM from 'react-dom/client'

import './index.css'

import {
  Column,
  Table,
  ExpandedState,
  useReactTable,
  getCoreRowModel,
  getPaginationRowModel,
  getFilteredRowModel,
  getExpandedRowModel,
  ColumnDef,
  flexRender,
} from '@tanstack/react-table'
import { makeData, Person } from './makeData'

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

  const columns = React.useMemo<ColumnDef<Person>[]>(
    () => [
      {
        accessorKey: 'firstName',
        header: ({ table }) => (
          <>
            <IndeterminateCheckbox
              {...{
                checked: table.getIsAllRowsSelected(),
                indeterminate: table.getIsSomeRowsSelected(),
                onChange: table.getToggleAllRowsSelectedHandler(),
              }}
            />{' '}
            <button
              {...{
                onClick: table.getToggleAllRowsExpandedHandler(),
              }}
            >
              {table.getIsAllRowsExpanded() ? '👇' : '👉'}
            </button>{' '}
            First Name
          </>
        ),
        cell: ({ row, getValue }) => (
          <div
            style={{
              // Since rows are flattened by default,
              // we can use the row.depth property
              // and paddingLeft to visually indicate the depth
              // of the row
              paddingLeft: `${row.depth * 2}rem`,
            }}
          >
            <div>
              <IndeterminateCheckbox
                {...{
                  checked: row.getIsSelected(),
                  indeterminate: row.getIsSomeSelected(),
                  onChange: row.getToggleSelectedHandler(),
                }}
              />{' '}
              {row.getCanExpand() ? (
                <button
                  {...{
                    onClick: row.getToggleExpandedHandler(),
                    style: { cursor: 'pointer' },
                  }}
                >
                  {row.getIsExpanded() ? '👇' : '👉'}
                </button>
              ) : (
                '🔵'
              )}{' '}
              {getValue<boolean>()}
            </div>
          </div>
        ),
        footer: props => props.column.id,
      },
      {
        accessorFn: row => row.lastName,
        id: 'lastName',
        cell: info => info.getValue(),
        header: () => <span>Last Name</span>,
        footer: props => props.column.id,
      },
      {
        accessorKey: 'age',
        header: () => 'Age',
        footer: props => props.column.id,
      },
      {
        accessorKey: 'visits',
        header: () => <span>Visits</span>,
        footer: props => props.column.id,
      },
      {
        accessorKey: 'status',
        header: 'Status',
        footer: props => props.column.id,
      },
      {
        accessorKey: 'progress',
        header: 'Profile Progress',
        footer: props => props.column.id,
      },
    ],
    []
  )

  const [data, setData] = React.useState(() => makeData(100, 5, 3))
  const refreshData = () => setData(() => makeData(100, 5, 3))

  const [expanded, setExpanded] = React.useState<ExpandedState>({})

  const table = useReactTable({
    data,
    columns,
    state: {
      expanded,
    },
    onExpandedChange: setExpanded,
    getSubRows: row => row.subRows,
    getCoreRowModel: getCoreRowModel(),
    getPaginationRowModel: getPaginationRowModel(),
    getFilteredRowModel: getFilteredRowModel(),
    getExpandedRowModel: getExpandedRowModel(),
    // filterFromLeafRows: true,
    // maxLeafRowFilterDepth: 0,
    debugTable: true,
  })

  return (
    <div className="p-2">
      <div className="h-2" />
      <table>
        <thead>
          {table.getHeaderGroups().map(headerGroup => (
            <tr key={headerGroup.id}>
              {headerGroup.headers.map(header => {
                return (
                  <th key={header.id} colSpan={header.colSpan}>
                    {header.isPlaceholder ? null : (
                      <div>
                        {flexRender(
                          header.column.columnDef.header,
                          header.getContext()
                        )}
                        {header.column.getCanFilter() ? (
                          <div>
                            <Filter column={header.column} table={table} />
                          </div>
                        ) : null}
                      </div>
                    )}
                  </th>
                )
              })}
            </tr>
          ))}
        </thead>
        <tbody>
          {table.getRowModel().rows.map(row => {
            return (
              <tr key={row.id}>
                {row.getVisibleCells().map(cell => {
                  return (
                    <td key={cell.id}>
                      {flexRender(
                        cell.column.columnDef.cell,
                        cell.getContext()
                      )}
                    </td>
                  )
                })}
              </tr>
            )
          })}
        </tbody>
      </table>
      <div className="h-2" />
      <div className="flex items-center gap-2">
        <button
          className="border rounded p-1"
          onClick={() => table.setPageIndex(0)}
          disabled={!table.getCanPreviousPage()}
        >
          {'<<'}
        </button>
        <button
          className="border rounded p-1"
          onClick={() => table.previousPage()}
          disabled={!table.getCanPreviousPage()}
        >
          {'<'}
        </button>
        <button
          className="border rounded p-1"
          onClick={() => table.nextPage()}
          disabled={!table.getCanNextPage()}
        >
          {'>'}
        </button>
        <button
          className="border rounded p-1"
          onClick={() => table.setPageIndex(table.getPageCount() - 1)}
          disabled={!table.getCanNextPage()}
        >
          {'>>'}
        </button>
        <span className="flex items-center gap-1">
          <div>Page</div>
          <strong>
            {table.getState().pagination.pageIndex + 1} of{' '}
            {table.getPageCount()}
          </strong>
        </span>
        <span className="flex items-center gap-1">
          | Go to page:
          <input
            type="number"
            min="1"
            max={table.getPageCount()}
            defaultValue={table.getState().pagination.pageIndex + 1}
            onChange={e => {
              const page = e.target.value ? Number(e.target.value) - 1 : 0
              table.setPageIndex(page)
            }}
            className="border p-1 rounded w-16"
          />
        </span>
        <select
          value={table.getState().pagination.pageSize}
          onChange={e => {
            table.setPageSize(Number(e.target.value))
          }}
        >
          {[10, 20, 30, 40, 50].map(pageSize => (
            <option key={pageSize} value={pageSize}>
              Show {pageSize}
            </option>
          ))}
        </select>
      </div>
      <div>{table.getRowModel().rows.length} Rows</div>
      <div>
        <button onClick={() => rerender()}>Force Rerender</button>
      </div>
      <div>
        <button onClick={() => refreshData()}>Refresh Data</button>
      </div>
      <label>Expanded State:</label>
      <pre>{JSON.stringify(expanded, null, 2)}</pre>
      <label>Row Selection State:</label>
      <pre>{JSON.stringify(table.getState().rowSelection, null, 2)}</pre>
    </div>
  )
}

function Filter({
  column,
  table,
}: {
  column: Column<any, any>
  table: Table<any>
}) {
  const firstValue = table
    .getPreFilteredRowModel()
    .flatRows[0]?.getValue(column.id)

  const columnFilterValue = column.getFilterValue()

  return typeof firstValue === 'number' ? (
    <div className="flex space-x-2">
      <input
        type="number"
        value={(columnFilterValue as [number, number])?.[0] ?? ''}
        onChange={e =>
          column.setFilterValue((old: [number, number]) => [
            e.target.value,
            old?.[1],
          ])
        }
        placeholder={`Min`}
        className="w-24 border shadow rounded"
      />
      <input
        type="number"
        value={(columnFilterValue as [number, number])?.[1] ?? ''}
        onChange={e =>
          column.setFilterValue((old: [number, number]) => [
            old?.[0],
            e.target.value,
          ])
        }
        placeholder={`Max`}
        className="w-24 border shadow rounded"
      />
    </div>
  ) : (
    <input
      type="text"
      value={(columnFilterValue ?? '') as string}
      onChange={e => column.setFilterValue(e.target.value)}
      placeholder={`Search...`}
      className="w-36 border shadow rounded"
    />
  )
}

function IndeterminateCheckbox({
  indeterminate,
  className = '',
  ...rest
}: { indeterminate?: boolean } & HTMLProps<HTMLInputElement>) {
  const ref = React.useRef<HTMLInputElement>(null!)

  React.useEffect(() => {
    if (typeof indeterminate === 'boolean') {
      ref.current.indeterminate = !rest.checked && indeterminate
    }
  }, [ref, indeterminate])

  return (
    <input
      type="checkbox"
      ref={ref}
      className={className + ' cursor-pointer'}
      {...rest}
    />
  )
}

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 React, { HTMLProps } from 'react'
import ReactDOM from 'react-dom/client'

import './index.css'

import {
  Column,
  Table,
  ExpandedState,
  useReactTable,
  getCoreRowModel,
  getPaginationRowModel,
  getFilteredRowModel,
  getExpandedRowModel,
  ColumnDef,
  flexRender,
} from '@tanstack/react-table'
import { makeData, Person } from './makeData'

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

  const columns = React.useMemo<ColumnDef<Person>[]>(
    () => [
      {
        accessorKey: 'firstName',
        header: ({ table }) => (
          <>
            <IndeterminateCheckbox
              {...{
                checked: table.getIsAllRowsSelected(),
                indeterminate: table.getIsSomeRowsSelected(),
                onChange: table.getToggleAllRowsSelectedHandler(),
              }}
            />{' '}
            <button
              {...{
                onClick: table.getToggleAllRowsExpandedHandler(),
              }}
            >
              {table.getIsAllRowsExpanded() ? '👇' : '👉'}
            </button>{' '}
            First Name
          </>
        ),
        cell: ({ row, getValue }) => (
          <div
            style={{
              // Since rows are flattened by default,
              // we can use the row.depth property
              // and paddingLeft to visually indicate the depth
              // of the row
              paddingLeft: `${row.depth * 2}rem`,
            }}
          >
            <div>
              <IndeterminateCheckbox
                {...{
                  checked: row.getIsSelected(),
                  indeterminate: row.getIsSomeSelected(),
                  onChange: row.getToggleSelectedHandler(),
                }}
              />{' '}
              {row.getCanExpand() ? (
                <button
                  {...{
                    onClick: row.getToggleExpandedHandler(),
                    style: { cursor: 'pointer' },
                  }}
                >
                  {row.getIsExpanded() ? '👇' : '👉'}
                </button>
              ) : (
                '🔵'
              )}{' '}
              {getValue<boolean>()}
            </div>
          </div>
        ),
        footer: props => props.column.id,
      },
      {
        accessorFn: row => row.lastName,
        id: 'lastName',
        cell: info => info.getValue(),
        header: () => <span>Last Name</span>,
        footer: props => props.column.id,
      },
      {
        accessorKey: 'age',
        header: () => 'Age',
        footer: props => props.column.id,
      },
      {
        accessorKey: 'visits',
        header: () => <span>Visits</span>,
        footer: props => props.column.id,
      },
      {
        accessorKey: 'status',
        header: 'Status',
        footer: props => props.column.id,
      },
      {
        accessorKey: 'progress',
        header: 'Profile Progress',
        footer: props => props.column.id,
      },
    ],
    []
  )

  const [data, setData] = React.useState(() => makeData(100, 5, 3))
  const refreshData = () => setData(() => makeData(100, 5, 3))

  const [expanded, setExpanded] = React.useState<ExpandedState>({})

  const table = useReactTable({
    data,
    columns,
    state: {
      expanded,
    },
    onExpandedChange: setExpanded,
    getSubRows: row => row.subRows,
    getCoreRowModel: getCoreRowModel(),
    getPaginationRowModel: getPaginationRowModel(),
    getFilteredRowModel: getFilteredRowModel(),
    getExpandedRowModel: getExpandedRowModel(),
    // filterFromLeafRows: true,
    // maxLeafRowFilterDepth: 0,
    debugTable: true,
  })

  return (
    <div className="p-2">
      <div className="h-2" />
      <table>
        <thead>
          {table.getHeaderGroups().map(headerGroup => (
            <tr key={headerGroup.id}>
              {headerGroup.headers.map(header => {
                return (
                  <th key={header.id} colSpan={header.colSpan}>
                    {header.isPlaceholder ? null : (
                      <div>
                        {flexRender(
                          header.column.columnDef.header,
                          header.getContext()
                        )}
                        {header.column.getCanFilter() ? (
                          <div>
                            <Filter column={header.column} table={table} />
                          </div>
                        ) : null}
                      </div>
                    )}
                  </th>
                )
              })}
            </tr>
          ))}
        </thead>
        <tbody>
          {table.getRowModel().rows.map(row => {
            return (
              <tr key={row.id}>
                {row.getVisibleCells().map(cell => {
                  return (
                    <td key={cell.id}>
                      {flexRender(
                        cell.column.columnDef.cell,
                        cell.getContext()
                      )}
                    </td>
                  )
                })}
              </tr>
            )
          })}
        </tbody>
      </table>
      <div className="h-2" />
      <div className="flex items-center gap-2">
        <button
          className="border rounded p-1"
          onClick={() => table.setPageIndex(0)}
          disabled={!table.getCanPreviousPage()}
        >
          {'<<'}
        </button>
        <button
          className="border rounded p-1"
          onClick={() => table.previousPage()}
          disabled={!table.getCanPreviousPage()}
        >
          {'<'}
        </button>
        <button
          className="border rounded p-1"
          onClick={() => table.nextPage()}
          disabled={!table.getCanNextPage()}
        >
          {'>'}
        </button>
        <button
          className="border rounded p-1"
          onClick={() => table.setPageIndex(table.getPageCount() - 1)}
          disabled={!table.getCanNextPage()}
        >
          {'>>'}
        </button>
        <span className="flex items-center gap-1">
          <div>Page</div>
          <strong>
            {table.getState().pagination.pageIndex + 1} of{' '}
            {table.getPageCount()}
          </strong>
        </span>
        <span className="flex items-center gap-1">
          | Go to page:
          <input
            type="number"
            min="1"
            max={table.getPageCount()}
            defaultValue={table.getState().pagination.pageIndex + 1}
            onChange={e => {
              const page = e.target.value ? Number(e.target.value) - 1 : 0
              table.setPageIndex(page)
            }}
            className="border p-1 rounded w-16"
          />
        </span>
        <select
          value={table.getState().pagination.pageSize}
          onChange={e => {
            table.setPageSize(Number(e.target.value))
          }}
        >
          {[10, 20, 30, 40, 50].map(pageSize => (
            <option key={pageSize} value={pageSize}>
              Show {pageSize}
            </option>
          ))}
        </select>
      </div>
      <div>{table.getRowModel().rows.length} Rows</div>
      <div>
        <button onClick={() => rerender()}>Force Rerender</button>
      </div>
      <div>
        <button onClick={() => refreshData()}>Refresh Data</button>
      </div>
      <label>Expanded State:</label>
      <pre>{JSON.stringify(expanded, null, 2)}</pre>
      <label>Row Selection State:</label>
      <pre>{JSON.stringify(table.getState().rowSelection, null, 2)}</pre>
    </div>
  )
}

function Filter({
  column,
  table,
}: {
  column: Column<any, any>
  table: Table<any>
}) {
  const firstValue = table
    .getPreFilteredRowModel()
    .flatRows[0]?.getValue(column.id)

  const columnFilterValue = column.getFilterValue()

  return typeof firstValue === 'number' ? (
    <div className="flex space-x-2">
      <input
        type="number"
        value={(columnFilterValue as [number, number])?.[0] ?? ''}
        onChange={e =>
          column.setFilterValue((old: [number, number]) => [
            e.target.value,
            old?.[1],
          ])
        }
        placeholder={`Min`}
        className="w-24 border shadow rounded"
      />
      <input
        type="number"
        value={(columnFilterValue as [number, number])?.[1] ?? ''}
        onChange={e =>
          column.setFilterValue((old: [number, number]) => [
            old?.[0],
            e.target.value,
          ])
        }
        placeholder={`Max`}
        className="w-24 border shadow rounded"
      />
    </div>
  ) : (
    <input
      type="text"
      value={(columnFilterValue ?? '') as string}
      onChange={e => column.setFilterValue(e.target.value)}
      placeholder={`Search...`}
      className="w-36 border shadow rounded"
    />
  )
}

function IndeterminateCheckbox({
  indeterminate,
  className = '',
  ...rest
}: { indeterminate?: boolean } & HTMLProps<HTMLInputElement>) {
  const ref = React.useRef<HTMLInputElement>(null!)

  React.useEffect(() => {
    if (typeof indeterminate === 'boolean') {
      ref.current.indeterminate = !rest.checked && indeterminate
    }
  }, [ref, indeterminate])

  return (
    <input
      type="checkbox"
      ref={ref}
      className={className + ' cursor-pointer'}
      {...rest}
    />
  )
}

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>
)