From 93dcb3916f8042ca3f97566502eb40b47e53b762 Mon Sep 17 00:00:00 2001
From: alsaze <veselov@alfabit.com>
Date: Tue, 18 Nov 2025 15:11:55 +0300
Subject: [PATCH] init

---
 api/queries/useGetUsers.ts |   2 +-
 package.json               |   3 +-
 pages/index.vue            | 202 +++++++++++++++++++++++++------------
 3 files changed, 138 insertions(+), 69 deletions(-)

diff --git a/api/queries/useGetUsers.ts b/api/queries/useGetUsers.ts
index 9a4c301..8e9d616 100644
--- a/api/queries/useGetUsers.ts
+++ b/api/queries/useGetUsers.ts
@@ -4,7 +4,7 @@ import { getUsers } from '~/api/endpoints'
 export const useGetUsers = () => {
   return useQuery<Users>({
     queryKey: ['get-users'],
-    queryFn: getUsers,
+    queryFn: () => getUsers(),
     staleTime: Infinity,
   })
 }
diff --git a/package.json b/package.json
index c81886f..c48ffb6 100644
--- a/package.json
+++ b/package.json
@@ -20,8 +20,9 @@
     "@nuxt/ui": "^4.0.1",
     "@nuxtjs/i18n": "^10.0.4",
     "@tanstack/vue-query": "^5.75.5",
-    "@tanstack/vue-table": "^8.21.3",
     "@tanstack/vue-query-devtools": "^5.87.1",
+    "@tanstack/vue-table": "^8.21.3",
+    "@tanstack/vue-virtual": "^3.13.12",
     "@vee-validate/nuxt": "^4.15.1",
     "@vueuse/core": "^13.1.0",
     "axios": "^1.12.2",
diff --git a/pages/index.vue b/pages/index.vue
index 12ab7ef..52e0b3c 100644
--- a/pages/index.vue
+++ b/pages/index.vue
@@ -11,49 +11,58 @@
       />
     </div>
 
-    <div class="table-wrapper">
-      <table>
-        <thead>
-          <tr
-            v-for="headerGroup in table?.getHeaderGroups()"
-            :key="headerGroup?.id"
-          >
-            <th
-              v-for="header in headerGroup?.headers"
-              :key="header?.id"
-              :colSpan="header?.colSpan"
-              :style="header.column.columnDef.meta?.style"
-              @click="header?.column?.getToggleSortingHandler()?.($event)"
+    <div
+      ref="tableContainerRef"
+      class="table-wrapper"
+    >
+      <div :style="{ height: `${totalSize}px` }">
+        <!-- Even though we're still using sematic table tags, we must use CSS grid and flexbox for dynamic row heights -->
+        <table>
+          <thead>
+            <tr
+              v-for="headerGroup in table?.getHeaderGroups()"
+              :key="headerGroup?.id"
             >
-              <FlexRender
-                v-if="!header?.isPlaceholder"
-                :render="header?.column?.columnDef?.header"
-                :props="header?.getContext()"
-              />
+              <th
+                v-for="header in headerGroup.headers"
+                :key="header.id"
+                :colspan="header.colSpan"
+                :style="[header.column.columnDef.meta?.style, isMobile ? { width: '100%' } : { width: `${header.getSize()}px` }]"
+                @click="header?.column?.getToggleSortingHandler()?.($event)"
+              >
+                <FlexRender
+                  v-if="!header?.isPlaceholder"
+                  :render="header?.column?.columnDef?.header"
+                  :props="header?.getContext()"
+                />
 
-              {{ { asc: ' 🔼', desc: ' 🔽' }[header.column.getIsSorted() as string] }}
-            </th>
-          </tr>
-        </thead>
+                {{ { asc: ' 🔼', desc: ' 🔽' }[header.column.getIsSorted() as string] }}
+              </th>
+            </tr>
+          </thead>
 
-        <tbody>
-          <tr
-            v-for="row in table?.getRowModel()?.rows"
-            :key="row?.id"
-          >
-            <td
-              v-for="cell in row?.getVisibleCells()"
-              :key="cell?.id"
-              :style="cell.column.columnDef.meta?.style"
+          <tbody :style="{ height: `${totalSize}px` }">
+            <tr
+              v-for="vRow in virtualRows"
+              :ref="measureElement /*measure dynamic row height*/"
+              :key="rows[vRow?.index]?.id"
+              :data-index=" vRow?.index /* needed for dynamic row height measurement*/ "
+              :style="{ transform: `translateY(${vRow?.start}px)` }"
             >
-              <FlexRender
-                :render="cell?.column?.columnDef?.cell"
-                :props="cell?.getContext()"
-              />
-            </td>
-          </tr>
-        </tbody>
-      </table>
+              <td
+                v-for="cell in rows[vRow?.index]?.getVisibleCells()"
+                :key="cell?.id"
+                :style="[cell.column.columnDef.meta?.style, isMobile ? { width: '100%' } : { width: `${cell.column.getSize()}px` }]"
+              >
+                <FlexRender
+                  :render="cell?.column?.columnDef?.cell"
+                  :props="cell?.getContext()"
+                />
+              </td>
+            </tr>
+          </tbody>
+        </table>
+      </div>
     </div>
 
     <UModal v-model:open="open" :title="selectedUser?.email">
@@ -81,6 +90,7 @@ import {
   getSortedRowModel,
   useVueTable,
 } from '@tanstack/vue-table'
+import { useVirtualizer } from '@tanstack/vue-virtual'
 import { useDebounceFn, useMediaQuery } from '@vueuse/core'
 import { useGetPosts, useGetUsers } from '~/api/queries'
 
@@ -108,7 +118,14 @@ const columns = [
   columnHelper.accessor('id', {
     header: 'ID',
     footer: props => props?.column?.id,
-    meta: { style: 'text-align: center' },
+    meta: {
+      style: {
+        display: 'flex',
+        justifyContent: 'center',
+        alignItems: 'center',
+      },
+    },
+    size: 50,
   }),
   columnHelper.accessor('title', {
     header: 'Заголовок',
@@ -119,15 +136,25 @@ const columns = [
           default: () => h('span', { class: 'ellipsis' }, truncate(info.getValue()),
           ),
         }),
+    size: 150,
   }),
   columnHelper.accessor('userEmail', {
     header: 'Автор',
-    cell: info => h(
-      'span',
-      { class: 'title-cell', onClick: () => openPost(info.row.original) },
-      info.getValue(),
-    ),
-    meta: { style: 'text-align: center' },
+    cell: info => isMobile.value
+      ? info.getValue()
+      : h(UTooltip, { text: info.getValue(),
+        }, {
+          default: () => h('div', { class: 'title-cell', onClick: () => openPost(info?.row?.original) }, truncate(info.getValue()),
+          ),
+        }),
+    meta: {
+      style: {
+        display: 'flex',
+        justifyContent: 'center',
+        alignItems: 'center',
+      },
+    },
+    size: 170,
   }),
   columnHelper.accessor('body', {
     header: 'Контент',
@@ -136,8 +163,9 @@ const columns = [
       : h(UTooltip, {
           text: info.getValue(),
         }, {
-          default: () => h('span', { class: 'ellipsis' }, truncate(info.getValue())),
+          default: () => h('span', { class: 'ellipsis' }, truncate(info.getValue(), 22)),
         }),
+    size: 220,
   }),
 ]
 
@@ -150,17 +178,46 @@ const table = useVueTable({
   getSortedRowModel: getSortedRowModel(),
 })
 
+// The virtualizer needs to know the scrollable container element
+const rows = computed(() => table?.getRowModel()?.rows)
+const tableContainerRef = ref<HTMLDivElement | null>(null)
+
+const rowVirtualizerOptions = computed(() => {
+  return {
+    count: rows.value.length,
+    estimateSize: () => 50, // estimate row height for accurate scrollbar dragging
+    getScrollElement: () => tableContainerRef.value,
+    overscan: 5,
+  }
+})
+
+const rowVirtualizer = useVirtualizer(rowVirtualizerOptions)
+
+const virtualRows = computed(() => rowVirtualizer.value.getVirtualItems())
+const totalSize = computed(() => rowVirtualizer.value.getTotalSize())
+
+function measureElement(el?: Element) {
+  if (!el) {
+    return
+  }
+
+  rowVirtualizer.value.measureElement(el)
+
+  return undefined
+}
+// virtualizer end
+
 function openPost(post: Post) {
   selectedUser.value = users?.value?.find(user => user?.id === post?.userId)
   open.value = true
 }
 
 function truncate(text: string, max = 15) {
-  return text.length > max ? `${text.slice(0, max)}…` : text
+  return text?.length > max ? `${text?.slice(0, max)}…` : text
 }
 </script>
 
-<style lang="scss" scoped>
+<style lang="scss">
 @use '~/assets/scss/utils' as *;
 
 .index-page {
@@ -191,11 +248,16 @@ function truncate(text: string, max = 15) {
 
 /* -------------------- TABLE WRAPPER -------------------- */
 .table-wrapper {
+  position: relative;
   margin-top: calc(40px + 10px);
   border-radius: 14px;
-  overflow: auto;
-  max-height: 600px;
+  overflow-y: auto;
+  height: 600px;
   scrollbar-width: thin;
+
+  @include mobile {
+    height: 500px;
+  }
 }
 
 table {
@@ -210,6 +272,18 @@ table {
 
 /* -------------------- HEADER -------------------- */
 
+thead {
+  display: grid;
+  position: sticky;
+  top: 0;
+  z-index: 1;
+}
+
+thead tr {
+  display: flex;
+  width: 100%;
+}
+
 thead th {
   background: var(--ui-bg-accented);
   color: var(--ui-text);
@@ -222,12 +296,20 @@ thead th {
 }
 
 thead th:hover {
-  background: var(--ui-bg-accented-hover);
+  cursor: pointer;
 }
 
 /* -------------------- BODY -------------------- */
 
+tbody {
+  display: grid;
+  position: relative;
+}
+
 tbody tr {
+  display: flex;
+  position: absolute;
+  width: 100%;
   height: 50px;
   transition: background 0.2s ease;
 }
@@ -241,8 +323,7 @@ tbody tr:hover {
 }
 
 tbody td {
-  padding: 12px 14px;
-  font-size: 14px;
+  padding: 10px 12px;
   border-bottom: 1px solid var(--ui-border-subtle);
 }
 
@@ -250,25 +331,12 @@ tbody tr:last-child td {
   border-bottom: none;
 }
 
-/* -------------------- SORT ICON -------------------- */
-
-th {
-  position: relative;
-}
-
-th .sort-icon {
-  margin-left: 6px;
-  opacity: 0.7;
-  font-size: 12px;
-}
-
 /* -------------------- CLICKABLE USER EMAIL CELL -------------------- */
 
 .title-cell {
   cursor: pointer;
   text-decoration: underline;
   color: var(--ui-primary);
-  font-weight: 500;
 }
 
 .title-cell:hover {