main.tsx

import React from 'react'
import ReactDOM from 'react-dom/client'
import { faker } from '@faker-js/faker'

import './index.css'

import {
  ColumnDef,
  ColumnOrderState,
  flexRender,
  getCoreRowModel,
  useReactTable,
} from '@tanstack/react-table'
import { makeData, Person } from './makeData'

const defaultColumns: ColumnDef<Person>[] = [
  {
    header: 'Name',
    footer: props => props.column.id,
    columns: [
      {
        accessorKey: 'firstName',
        cell: info => info.getValue(),
        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,
      },
    ],
  },
  {
    header: 'Info',
    footer: props => props.column.id,
    columns: [
      {
        accessorKey: 'age',
        header: () => 'Age',
        footer: props => props.column.id,
      },
      {
        header: 'More Info',
        columns: [
          {
            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,
          },
        ],
      },
    ],
  },
]

function App() {
  const [data, setData] = React.useState(() => makeData(20))
  const [columns] = React.useState(() => [...defaultColumns])

  const [columnVisibility, setColumnVisibility] = React.useState({})
  const [columnOrder, setColumnOrder] = React.useState<ColumnOrderState>([])

  const rerender = () => setData(() => makeData(20))

  const table = useReactTable({
    data,
    columns,
    state: {
      columnVisibility,
      columnOrder,
    },
    onColumnVisibilityChange: setColumnVisibility,
    onColumnOrderChange: setColumnOrder,
    getCoreRowModel: getCoreRowModel(),
    debugTable: true,
    debugHeaders: true,
    debugColumns: true,
  })

  const randomizeColumns = () => {
    table.setColumnOrder(
      faker.helpers.shuffle(table.getAllLeafColumns().map(d => d.id))
    )
  }

  return (
    <div className="p-2">
      <div className="inline-block border border-black shadow rounded">
        <div className="px-1 border-b border-black">
          <label>
            <input
              {...{
                type: 'checkbox',
                checked: table.getIsAllColumnsVisible(),
                onChange: table.getToggleAllColumnsVisibilityHandler(),
              }}
            />{' '}
            Toggle All
          </label>
        </div>
        {table.getAllLeafColumns().map(column => {
          return (
            <div key={column.id} className="px-1">
              <label>
                <input
                  {...{
                    type: 'checkbox',
                    checked: column.getIsVisible(),
                    onChange: column.getToggleVisibilityHandler(),
                  }}
                />{' '}
                {column.id}
              </label>
            </div>
          )
        })}
      </div>
      <div className="h-4" />
      <div className="flex flex-wrap gap-2">
        <button onClick={() => rerender()} className="border p-1">
          Regenerate
        </button>
        <button onClick={() => randomizeColumns()} className="border p-1">
          Shuffle Columns
        </button>
      </div>
      <div className="h-4" />
      <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>
      <pre>{JSON.stringify(table.getState().columnOrder, null, 2)}</pre>
    </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>
)