Svelte Example: Row Selection

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<script lang="ts">
  import {
    columnFilteringFeature,
    createFilteredRowModel,
    createPaginatedRowModel,
    createTable,
    filterFns,
    FlexRender,
    globalFilteringFeature,
    rowPaginationFeature,
    rowSelectionFeature,
    tableFeatures,
  } from '@tanstack/svelte-table'
  import { makeData } from './makeData'
  import type { Person } from './makeData'
  import type {
    Column,
    ColumnDef,
    SvelteTable,
  } from '@tanstack/svelte-table'
  import './index.css'

  const features = tableFeatures({
    rowPaginationFeature,
    rowSelectionFeature,
    columnFilteringFeature,
    globalFilteringFeature,
    filteredRowModel: createFilteredRowModel(),
    paginatedRowModel: createPaginatedRowModel(),
    filterFns,
  })

  let data = $state(makeData(1_000))
  const refreshData = () => { data = makeData(1_000) }
  const stressTest = () => { data = makeData(200_000) }

  // Svelte action to set indeterminate property on checkbox inputs
  function setIndeterminate(node: HTMLInputElement, value: boolean) {
    node.indeterminate = value
    return {
      update(newValue: boolean) {
        node.indeterminate = newValue
      },
    }
  }

  // Create table with selector to track specific state
  const table = createTable(
    {
      features,
      get data() {
        return data
      },
      columns: [
        {
          id: 'select',
          header: () => 'select',
          cell: ({ row }) => row.getIsSelected(),
        },
        {
          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,
                },
              ],
            },
          ],
        },
      ],
      getRowId: (row) => row.id,
      enableRowSelection: true,
      debugTable: true,
    },
    (state) => ({
      rowSelection: state.rowSelection,
      globalFilter: state.globalFilter,
      pagination: state.pagination,
    }),
  )
</script>

<div class="demo-root">
  <div>
    <button onclick={() => refreshData()}>Regenerate Data</button>
    <button onclick={() => stressTest()}>Stress Test (200k rows)</button>
  </div>
  <div>
    <input
      value={table.state.globalFilter ?? ''}
      oninput={(e) => table.setGlobalFilter((e.target as HTMLInputElement).value)}
      class="summary-panel"
      placeholder="Search all columns..."
    />
  </div>
  <div class="spacer-sm"></div>
  <table>
    <thead>
      {#each table.getHeaderGroups() as headerGroup (headerGroup.id)
      }
        <tr>
          {#each headerGroup.headers as header (header.id)}
            <th colSpan={header.colSpan}>
              {#if !header.isPlaceholder}
                {#if header.id === 'select'}
                  <input
                    type="checkbox"
                    checked={table.getIsAllRowsSelected()}
                    use:setIndeterminate={!table.getIsAllRowsSelected() && table.getIsSomeRowsSelected()}
                    onchange={table.getToggleAllRowsSelectedHandler()}
                    class="sortable-header"
                  />
                {:else}
                  <FlexRender header={header} />
                {/if}
                {#if header.column.getCanFilter()}
                  <div>
                    {@render Filter(header.column, table)}
                  </div>
                {/if}
              {/if}
            </th>
          {/each}
        </tr>
      {/each}
    </thead>
    <tbody>
      {#each table.getRowModel().rows as row (row.id)}
        <tr>
          {#each row.getAllCells() as cell (cell.id)}
            <td>
              {#if cell.column.id === 'select'}
                <input
                  type="checkbox"
                  checked={row.getIsSelected()}
                  disabled={!row.getCanSelect()}
                  use:setIndeterminate={!row.getIsSelected() && row.getIsSomeSelected()}
                  onchange={row.getToggleSelectedHandler()}
                  class="sortable-header"
                />
              {:else}
                <FlexRender cell={cell} />
              {/if}
            </td>
          {/each}
        </tr>
      {/each}
    </tbody>
    <tfoot>
      <tr>
        <td class="cell-padding">
          <input
            type="checkbox"
            checked={table.getIsAllPageRowsSelected()}
            use:setIndeterminate={!table.getIsAllPageRowsSelected() && table.getIsSomePageRowsSelected()}
            onchange={table.getToggleAllPageRowsSelectedHandler()}
            class="sortable-header"
          />
        </td>
        <td colSpan={20}>Page Rows ({table.getRowModel().rows.length.toLocaleString()})</td>
      </tr>
    </tfoot>
  </table>
  <div class="spacer-sm"></div>
  <div class="controls">
    <button
      class="demo-button demo-button-sm"
      onclick={() => table.setPageIndex(0)
      }
      disabled={!table.getCanPreviousPage()}
    >
      {'<<'}
    </button>
    <button
      class="demo-button demo-button-sm"
      onclick={() => table.previousPage()}
      disabled={!table.getCanPreviousPage()}
    >
      {'<'}
    </button>
    <button
      class="demo-button demo-button-sm"
      onclick={() => table.nextPage()}
      disabled={!table.getCanNextPage()}
    >
      {'>'}
    </button>
    <button
      class="demo-button demo-button-sm"
      onclick={() => table.setPageIndex(table.getPageCount() - 1)}
      disabled={!table.getCanNextPage()}
    >
      {'>>'}
    </button>
    <span class="inline-controls">
      <div>Page</div>
      <strong>
        {(table.state.pagination.pageIndex + 1).toLocaleString()} of {table.getPageCount().toLocaleString()}
      </strong>
    </span>
    <span class="inline-controls">
      | Go to page:
      <input
        type="number"
        min="1"
        max={table.getPageCount()}
        value={table.state.pagination.pageIndex + 1}
        oninput={(e) => {
          const page = (e.target as HTMLInputElement).value ? Number((e.target as HTMLInputElement).value) - 1 : 0
          table.setPageIndex(page)
        }}
        class="page-size-input"
      />
    </span>
    <select
      value={table.state.pagination.pageSize}
      onchange={(e) => {
        table.setPageSize(Number((e.target as HTMLSelectElement).value))
      }}
    >
      {#each [10, 20, 30, 40, 50] as pageSize}
        <option value={pageSize}>Show {pageSize}</option>
      {/each}
    </select>
  </div>
  <br />
  <div>
    {Object.keys(table.state.rowSelection).length.toLocaleString()} of{' '}
    {table.getPreFilteredRowModel().rows.length.toLocaleString()} Total Rows Selected
  </div>
  <hr />
  <br />
  <div>
    <button
      class="demo-button demo-button-spaced"
      onclick={() =>
        console.info(
          'table.getSelectedRowModel().flatRows',
          table.getSelectedRowModel().flatRows,
        )
      }
    >
      Log table.getSelectedRowModel().flatRows
    </button>
  </div>
  <div>
    <strong>Row Selection State:</strong>
    <pre>{JSON.stringify(table.state, null, 2)
    }</pre>
  </div>
</div>

{#snippet Filter(
  column: Column<typeof features, Person>,
  table: SvelteTable<typeof features, Person, any>,
)}
  {@const firstValue = table
    .getPreFilteredRowModel()
    .flatRows[0]?.getValue(column.id)}

  {#if typeof firstValue === 'number'}
    <div class="filter-row">
      <input
        type="number"
        value={((column.getFilterValue() as any)?.[0] ?? '') as string}
        oninput={(e) =>
          column.setFilterValue((old: any) => [(e.target as HTMLInputElement).value, old?.[1]])
        }
        placeholder={`Min`}
        class="filter-input"
      />
      <input
        type="number"
        value={((column.getFilterValue() as any)?.[1] ?? '') as string}
        oninput={(e) =>
          column.setFilterValue((old: any) => [old?.[0], (e.target as HTMLInputElement).value])
        }
        placeholder={`Max`}
        class="filter-input"
      />
    </div>
  {:else}
    <input
      type="text"
      value={(column.getFilterValue() ?? '') as string}
      oninput={(e) => column.setFilterValue((e.target as HTMLInputElement).value)}
      placeholder={`Search...`}
      class="filter-select"
    />
  {/if}
{/snippet}