Svelte Example: Column Groups

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<script lang="ts">
  import type { ColumnDef } from '@tanstack/svelte-table'
  import {
    FlexRender,
    createTable,
    tableFeatures,
  } from '@tanstack/svelte-table'
  import './index.css'

  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 _features = tableFeatures({})

  const defaultColumns: ColumnDef<typeof _features, 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: () => 'Last Name',
          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: () => 'Visits',
              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 table = createTable({
    _features,
    _rowModels: {},
    data: defaultData,
    columns: defaultColumns,
  })
</script>

<div class="p-2">
  <table>
    <thead>
      {#each table.getHeaderGroups() as headerGroup}
        <tr>
          {#each headerGroup.headers as header}
            <th colSpan={header.colSpan}>
              {#if !header.isPlaceholder}
                <FlexRender
                  content={header.column.columnDef.header}
                  context={header.getContext()}
                />
              {/if}
            </th>
          {/each}
        </tr>
      {/each}
    </thead>
    <tbody>
      {#each table.getRowModel().rows as row}
        <tr>
          {#each row.getAllCells() as cell}
            <td>
              <FlexRender
                content={cell.column.columnDef.cell}
                context={cell.getContext()}
              />
            </td>
          {/each}
        </tr>
      {/each}
    </tbody>
    <tfoot>
      {#each table.getFooterGroups() as footerGroup}
        <tr>
          {#each footerGroup.headers as header}
            <th colSpan={header.colSpan}>
              {#if !header.isPlaceholder}
                <FlexRender
                  content={header.column.columnDef.footer}
                  context={header.getContext()}
                />
              {/if}
            </th>
          {/each}
        </tr>
      {/each}
    </tfoot>
  </table>
  <div class="h-4"></div>
</div>