feat(Table): add footer support to display column summary

docs/app/components/content/examples/table/TableColumnFooterExample.vue

@@ -0,0 +1,106 @@
+<script setup lang="ts">
+import { h, resolveComponent } from 'vue'
+import type { TableColumn, TableRow } from '@nuxt/ui'
+
+const UBadge = resolveComponent('UBadge')
+
+type Payment = {
+  id: string
+  date: string
+  status: 'paid' | 'failed' | 'refunded'
+  email: string
+  amount: number
+}
+
+const data = ref<Payment[]>([{
+  id: '4600',
+  date: '2024-03-11T15:30:00',
+  status: 'paid',
+  email: '[email protected]',
+  amount: 594
+}, {
+  id: '4599',
+  date: '2024-03-11T10:10:00',
+  status: 'failed',
+  email: '[email protected]',
+  amount: 276
+}, {
+  id: '4598',
+  date: '2024-03-11T08:50:00',
+  status: 'refunded',
+  email: '[email protected]',
+  amount: 315
+}, {
+  id: '4597',
+  date: '2024-03-10T19:45:00',
+  status: 'paid',
+  email: '[email protected]',
+  amount: 529
+}, {
+  id: '4596',
+  date: '2024-03-10T15:55:00',
+  status: 'paid',
+  email: '[email protected]',
+  amount: 639
+}])
+
+const columns: TableColumn<Payment>[] = [{
+  accessorKey: 'id',
+  header: '#',
+  cell: ({ row }) => `#${row.getValue('id')}`
+}, {
+  accessorKey: 'date',
+  header: 'Date',
+  cell: ({ row }) => {
+    return new Date(row.getValue('date')).toLocaleString('en-US', {
+      day: 'numeric',
+      month: 'short',
+      hour: '2-digit',
+      minute: '2-digit',
+      hour12: false
+    })
+  }
+}, {
+  accessorKey: 'status',
+  header: 'Status',
+  cell: ({ row }) => {
+    const color = ({
+      paid: 'success' as const,
+      failed: 'error' as const,
+      refunded: 'neutral' as const
+    })[row.getValue('status') as string]
+
+    return h(UBadge, { class: 'capitalize', variant: 'subtle', color }, () => row.getValue('status'))
+  }
+}, {
+  accessorKey: 'email',
+  header: 'Email'
+}, {
+  accessorKey: 'amount',
+  header: () => h('div', { class: 'text-right' }, 'Amount'),
+  footer: ({ column }) => {
+    const total = column.getFacetedRowModel().rows.reduce((acc: number, row: TableRow<Payment>) => acc + Number.parseFloat(row.getValue('amount')), 0)
+
+    const formatted = new Intl.NumberFormat('en-US', {
+      style: 'currency',
+      currency: 'EUR'
+    }).format(total)
+
+    return h('div', { class: 'text-right font-medium' }, `Total: ${formatted}`)
+  },
+  cell: ({ row }) => {
+    const amount = Number.parseFloat(row.getValue('amount'))
+
+    const formatted = new Intl.NumberFormat('en-US', {
+      style: 'currency',
+      currency: 'EUR'
+    }).format(amount)
+
+    return h('div', { class: 'text-right font-medium' }, formatted)
+  }
+}]
+</script>
+
+<template>
+  <UTable :data="data" :columns="columns" class="flex-1" />
+</template>

docs/content/3.components/table.md

@@ -77,6 +77,7 @@ Use the `columns` prop as an array of [ColumnDef](https://tanstack.com/table/lat
 
 - `accessorKey`: [The key of the row object to use when extracting the value for the column.]{class="text-muted"}
 - `header`: [The header to display for the column. If a string is passed, it can be used as a default for the column ID. If a function is passed, it will be passed a props object for the header and should return the rendered header value (the exact type depends on the adapter being used).]{class="text-muted"}
+- `footer`: [The footer to display for the column. Works exactly like header, but is displayed under the table.]{class="text-muted"}
 - `cell`: [The cell to display each row for the column. If a function is passed, it will be passed a props object for the cell and should return the rendered cell value (the exact type depends on the adapter being used).]{class="text-muted"}
 - `meta`: [Extra properties for the column.]{class="text-muted"}
   - `class`:
@@ -161,7 +162,7 @@ props:
 
 ### Sticky
 
-Use the `sticky` prop to make the header sticky.
+Use the `sticky` prop to make the header or footer sticky.
 
 ::component-code
 ---
@@ -172,6 +173,10 @@ ignore:
   - class
 external:
   - data
+items:
+  sticky:
+    - true
+    - false
 props:
   sticky: true
   data:
@@ -372,6 +377,22 @@ class: '!p-0'
 This example is similar as the Popover [with following cursor example](/components/popover#with-following-cursor) and uses a [`refDebounced`](https://vueuse.org/shared/refDebounced/#refdebounced) to prevent the Popover from opening and closing too quickly when moving the cursor from one row to another.
 ::
 
+### With column footer :badge{label="Soon" class="align-text-top"}
+
+You can add a `footer` property to the column definition to render a footer for the column.
+
+::component-example
+---
+prettier: true
+collapse: true
+name: 'table-column-footer-example'
+highlights:
+  - 94
+  - 108
+class: '!p-0'
+---
+::
+
 ### With column sorting
 
 You can update a column `header` to render a [Button](/components/button) component inside the `header` to toggle the sorting state using the TanStack Table [Sorting APIs](https://tanstack.com/table/latest/docs/api/features/sorting).

playground/app/pages/components/table.vue

@@ -242,6 +242,16 @@ const columns: TableColumn<Payment>[] = [{
 }, {
   accessorKey: 'amount',
   header: () => h('div', { class: 'text-right' }, 'Amount'),
+  footer: ({ column }) => {
+    const total = column.getFacetedRowModel().rows.reduce((acc: number, row: TableRow<Payment>) => acc + Number.parseFloat(row.getValue('amount')), 0)
+
+    const formatted = new Intl.NumberFormat('en-US', {
+      style: 'currency',
+      currency: 'EUR'
+    }).format(total)
+
+    return h('div', { class: 'text-right font-medium' }, `Total: ${formatted}`)
+  },
   cell: ({ row }) => {
     const amount = Number.parseFloat(row.getValue('amount'))
 

src/runtime/components/Table.vue

@@ -83,10 +83,10 @@ export interface TableProps<T extends TableData = TableData> extends TableOption
    */
   empty?: string
   /**
-   * Whether the table should have a sticky header.
+   * Whether the table should have a sticky header or footer. True for both, 'header' for header only, 'footer' for footer only.
    * @defaultValue false
    */
-  sticky?: boolean
+  sticky?: boolean | 'header' | 'footer'
   /** Whether the table should be in loading state. */
   loading?: boolean
   /**
@@ -172,6 +172,7 @@ export interface TableProps<T extends TableData = TableData> extends TableOption
 }
 
 type DynamicHeaderSlots<T, K = keyof T> = Record<string, (props: HeaderContext<T, unknown>) => any> & Record<`${K extends string ? K : never}-header`, (props: HeaderContext<T, unknown>) => any>
+type DynamicFooterSlots<T, K = keyof T> = Record<string, (props: HeaderContext<T, unknown>) => any> & Record<`${K extends string ? K : never}-footer`, (props: HeaderContext<T, unknown>) => any>
 type DynamicCellSlots<T, K = keyof T> = Record<string, (props: CellContext<T, unknown>) => any> & Record<`${K extends string ? K : never}-cell`, (props: CellContext<T, unknown>) => any>
 
 export type TableSlots<T extends TableData = TableData> = {
@@ -181,7 +182,7 @@ export type TableSlots<T extends TableData = TableData> = {
   'caption': (props?: {}) => any
   'body-top': (props?: {}) => any
   'body-bottom': (props?: {}) => any
-} & DynamicHeaderSlots<T> & DynamicCellSlots<T>
+} & DynamicHeaderSlots<T> & DynamicFooterSlots<T> & DynamicCellSlots<T>
 
 </script>
 
@@ -216,6 +217,22 @@ const ui = computed(() => tv({ extend: tv(theme), ...(appConfig.ui?.table || {})
   loadingAnimation: props.loadingAnimation
 }))
 
+const hasFooter = computed(() => {
+  function hasFooterRecursive(columns: TableColumn<T>[]): boolean {
+    for (const column of columns) {
+      if ('footer' in column) {
+        return true
+      }
+      if ('columns' in column && hasFooterRecursive(column.columns as TableColumn<T>[])) {
+        return true
+      }
+    }
+    return false
+  }
+
+  return hasFooterRecursive(columns.value)
+})
+
 const globalFilterState = defineModel<string>('globalFilter', { default: undefined })
 const columnFiltersState = defineModel<ColumnFiltersState>('columnFilters', { default: [] })
 const columnOrderState = defineModel<ColumnOrderState>('columnOrder', { default: [] })
@@ -461,6 +478,30 @@ defineExpose({
 
         <slot name="body-bottom" />
       </tbody>
+
+      <tfoot v-if="hasFooter" :class="ui.tfoot({ class: [props.ui?.tfoot] })">
+        <tr :class="ui.separator({ class: [props.ui?.separator] })" />
+
+        <tr v-for="footerGroup in tableApi.getFooterGroups()" :key="footerGroup.id" :class="ui.tr({ class: [props.ui?.tr] })">
+          <th
+            v-for="header in footerGroup.headers"
+            :key="header.id"
+            :data-pinned="header.column.getIsPinned()"
+            :colspan="header.colSpan > 1 ? header.colSpan : undefined"
+            :class="ui.th({
+              class: [
+                props.ui?.th,
+                typeof header.column.columnDef.meta?.class?.th === 'function' ? header.column.columnDef.meta.class.th(header) : header.column.columnDef.meta?.class?.th
+              ],
+              pinned: !!header.column.getIsPinned()
+            })"
+          >
+            <slot :name="`${header.id}-footer`" v-bind="header.getContext()">
+              <FlexRender v-if="!header.isPlaceholder" :render="header.column.columnDef.footer" :props="header.getContext()" />
+            </slot>
+          </th>
+        </tr>
+      </tfoot>
     </table>
   </Primitive>
 </template>

src/theme/table.ts

@@ -7,6 +7,7 @@ export default (options: Required<ModuleOptions>) => ({
     caption: 'sr-only',
     thead: 'relative',
     tbody: 'divide-y divide-default [&>tr]:data-[selectable=true]:hover:bg-elevated/50 [&>tr]:data-[selectable=true]:focus-visible:outline-primary',
+    tfoot: 'relative',
     tr: 'data-[selected=true]:bg-elevated/50',
     th: 'px-4 py-3.5 text-sm text-highlighted text-left rtl:text-right font-semibold [&:has([role=checkbox])]:pe-0',
     td: 'p-4 text-sm text-muted whitespace-nowrap [&:has([role=checkbox])]:pe-0',
@@ -23,7 +24,14 @@ export default (options: Required<ModuleOptions>) => ({
     },
     sticky: {
       true: {
+        thead: 'sticky top-0 inset-x-0 bg-default/75 z-[1] backdrop-blur',
+        tfoot: 'sticky bottom-0 inset-x-0 bg-default/75 z-[1] backdrop-blur'
+      },
+      header: {
         thead: 'sticky top-0 inset-x-0 bg-default/75 z-[1] backdrop-blur'
+      },
+      footer: {
+        tfoot: 'sticky bottom-0 inset-x-0 bg-default/75 z-[1] backdrop-blur'
       }
     },
     loading: {

test/components/Table.spec.ts

@@ -4,7 +4,7 @@ import { flushPromises } from '@vue/test-utils'
 import { mountSuspended } from '@nuxt/test-utils/runtime'
 import { UCheckbox, UButton, UBadge, UDropdownMenu } from '#components'
 import Table from '../../src/runtime/components/Table.vue'
-import type { TableProps, TableSlots, TableColumn } from '../../src/runtime/components/Table.vue'
+import type { TableProps, TableSlots, TableColumn, TableRow } from '../../src/runtime/components/Table.vue'
 import ComponentRender from '../component-render'
 import theme from '#build/ui/table'
 
@@ -99,6 +99,16 @@ describe('Table', () => {
   }, {
     accessorKey: 'amount',
     header: () => h('div', { class: 'text-right' }, 'Amount'),
+    footer: ({ column }) => {
+      const total = column.getFacetedRowModel().rows.reduce((acc: number, row: TableRow<typeof data[number]>) => acc + Number.parseFloat(row.getValue('amount')), 0)
+
+      const formatted = new Intl.NumberFormat('en-US', {
+        style: 'currency',
+        currency: 'EUR'
+      }).format(total)
+
+      return h('div', { class: 'text-right font-medium' }, `Total: ${formatted}`)
+    },
     cell: ({ row }) => {
       const amount = Number.parseFloat(row.getValue('amount'))