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| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 | 24x 1x 54x 81x 1x 108x 13x 13x 13x 13x 13x 13x 22x 11x 11x 13x 13x 13x 13x 13x 13x 13x 132x 6x 4x 4x 4x 3x 3x 3x 1x 13x 13x 13x 13x 13x 13x 13x 6x 13x 13x 13x 13x | <template>
<div ref="scrollElement" class="virtual-scroll-wrapper">
<div class="container-fluid">
<div
:style="{
height: `${virtualizer.getTotalSize()}px`,
width: '100%',
position: 'relative'
}"
>
<div
v-for="virtualRow in virtualizer.getVirtualItems()"
:key="virtualRow.index"
:ref="(el) => virtualizer.measureElement(el as Element)"
:data-index="virtualRow.index"
:style="{
position: 'absolute',
top: 0,
left: 0,
width: '100%',
transform: `translateY(${virtualRow.start}px)`
}"
>
<div class="row g-3 mb-3">
<div
v-for="colIndex in columnsPerRow"
:key="
items[virtualRow.index * columnsPerRow + colIndex - 1]?.id ||
`col-${virtualRow.index}-${colIndex}`
"
:class="columnClass"
>
<slot
v-if="items[virtualRow.index * columnsPerRow + colIndex - 1]"
name="card"
:item="items[virtualRow.index * columnsPerRow + colIndex - 1]"
:index="virtualRow.index * columnsPerRow + colIndex - 1"
/>
</div>
</div>
</div>
</div>
</div>
</div>
</template>
<script setup lang="ts">
import { ref, computed, onMounted, onUnmounted } from 'vue'
import { useVirtualizer } from '@tanstack/vue-virtual'
const props = withDefaults(
defineProps<{
items: any[]
hasMore?: boolean
isLoading?: boolean
estimateSize?: number
offsetHeight?: number
minCardWidth?: number
}>(),
{
offsetHeight: 200,
estimateSize: 400,
minCardWidth: 400
}
)
const emit = defineEmits<{
loadMore: []
}>()
const scrollElement = ref<HTMLElement | null>(null)
const isLoadingMore = ref(false)
const columnsPerRow = ref(3)
// Calculate responsive columns based on container width
const columnClass = computed(() => {
// Dynamic Bootstrap classes based on columns
if (columnsPerRow.value === 1) return 'col-12'
Iif (columnsPerRow.value === 2) return 'col-md-6'
Eif (columnsPerRow.value === 3) return 'col-md-6 col-lg-4'
if (columnsPerRow.value === 4) return 'col-sm-6 col-md-4 col-lg-3'
if (columnsPerRow.value === 5) return 'col-sm-6 col-md-4 col-lg-3 col-xl-2-4'
if (columnsPerRow.value >= 6) return 'col-sm-6 col-md-4 col-lg-2'
return 'col-md-6 col-lg-4'
})
function updateColumnsPerRow() {
Iif (!scrollElement.value) return
const containerWidth = scrollElement.value.clientWidth
// Account for Bootstrap container padding
const effectiveWidth = containerWidth - 32 // 1rem padding on each side
// Calculate columns based on minCardWidth (default 400px)
const calculatedColumns = Math.floor(effectiveWidth / props.minCardWidth)
columnsPerRow.value = Math.max(1, Math.min(calculatedColumns, 6)) // Between 1 and 6 columns
}
const virtualizer = useVirtualizer(
computed(() => ({
count: Math.ceil(props.items.length / columnsPerRow.value),
getScrollElement: () => scrollElement.value,
estimateSize: () => props.estimateSize || 450,
measureElement: (el) => el?.getBoundingClientRect().height ?? (props.estimateSize || 450),
overscan: 2
}))
)
// Scroll detection for infinite loading
function checkLoadMore() {
if (!scrollElement.value || isLoadingMore.value || !props.hasMore || props.isLoading) return
const { scrollTop, scrollHeight, clientHeight } = scrollElement.value
const scrollPercentage = (scrollTop + clientHeight) / scrollHeight
if (scrollPercentage > 0.8 && !isLoadingMore.value && props.hasMore) {
isLoadingMore.value = true
emit('loadMore')
// Reset loading state after a delay (parent will handle actual loading)
setTimeout(() => {
isLoadingMore.value = false
}, 100)
}
}
let resizeObserver: ResizeObserver | null = null
onMounted(() => {
Eif (scrollElement.value) {
// Initial column calculation
updateColumnsPerRow()
// Set up resize observer for responsive columns
resizeObserver = new ResizeObserver(() => {
updateColumnsPerRow()
})
resizeObserver.observe(scrollElement.value)
// Set up scroll listener for infinite loading
if (props.hasMore) {
scrollElement.value.addEventListener('scroll', checkLoadMore)
}
}
})
onUnmounted(() => {
Iif (scrollElement.value) {
scrollElement.value.removeEventListener('scroll', checkLoadMore)
}
Eif (resizeObserver) {
resizeObserver.disconnect()
}
})
</script>
<style scoped>
.virtual-scroll-wrapper {
flex: 1 1 auto;
height: auto;
overflow-y: auto;
overflow-x: hidden;
padding-top: 1rem;
}
.virtual-scroll-wrapper :deep(.container-fluid) {
padding-left: 1rem;
padding-right: 1rem;
}
/* Custom column class for 5-column layout */
.col-xl-2-4 {
flex: 0 0 auto;
width: 20%;
}
@media (max-width: 767px) {
.virtual-scroll-wrapper :deep(.container-fluid) {
padding-left: 1rem;
padding-right: 1rem;
}
}
</style>
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