248 lines
11 KiB
Vue
248 lines
11 KiB
Vue
<template>
|
|
<div>
|
|
<Head>
|
|
<Title>Vue VirtualScroller Component</Title>
|
|
<Meta name="description" content="VirtualScroller is a performant approach to handle huge data efficiently." />
|
|
</Head>
|
|
|
|
<div class="content-section introduction">
|
|
<div class="feature-intro">
|
|
<h1>VirtualScroller</h1>
|
|
<p>VirtualScroller is a performant approach to handle huge data efficiently.</p>
|
|
</div>
|
|
<AppDemoActions />
|
|
</div>
|
|
|
|
<div class="content-section implementation virtualscroller-demo">
|
|
<div class="card">
|
|
<h5 class="mb-0">Basic</h5>
|
|
<div class="flex align-items-center flex-wrap">
|
|
<div class="flex flex-column mr-3 mt-3">
|
|
<h6>Vertical</h6>
|
|
<VirtualScroller :items="basicItems" :itemSize="50">
|
|
<template v-slot:item="{ item, options }">
|
|
<div :class="['scroll-item p-2', { odd: options.odd }]" style="height: 50px">{{ item }}</div>
|
|
</template>
|
|
</VirtualScroller>
|
|
</div>
|
|
|
|
<div class="flex flex-column mr-3 mt-3">
|
|
<h6>Horizontal</h6>
|
|
<VirtualScroller :items="basicItems" :itemSize="50" orientation="horizontal">
|
|
<template v-slot:item="{ item, options }">
|
|
<div :class="['scroll-item p-2', { odd: options.odd }]" style="width: 50px">{{ item }}</div>
|
|
</template>
|
|
</VirtualScroller>
|
|
</div>
|
|
|
|
<div class="flex flex-column mr-3 mt-3">
|
|
<h6>Both</h6>
|
|
<VirtualScroller :items="multiItems" :itemSize="[50, 100]" orientation="both">
|
|
<template v-slot:item="{ item, options }">
|
|
<div :class="['scroll-item p-2', { odd: options.odd }]" style="height: 50px">
|
|
<template v-for="(el, index) of item" :key="index">
|
|
<div style="width: 100px">{{ el }}</div>
|
|
</template>
|
|
</div>
|
|
</template>
|
|
</VirtualScroller>
|
|
</div>
|
|
</div>
|
|
</div>
|
|
|
|
<div class="card">
|
|
<h5 class="mb-0">Scroll Delay</h5>
|
|
<div class="flex align-items-center flex-wrap">
|
|
<div class="flex flex-column mr-3 mt-3">
|
|
<h6>0ms Delay</h6>
|
|
<VirtualScroller :items="basicItems" :itemSize="50">
|
|
<template v-slot:item="{ item, options }">
|
|
<div :class="['scroll-item p-2', { odd: options.odd }]" style="height: 50px">{{ item }}</div>
|
|
</template>
|
|
</VirtualScroller>
|
|
</div>
|
|
|
|
<div class="flex flex-column mr-3 mt-3">
|
|
<h6>150ms Delay</h6>
|
|
<VirtualScroller :items="basicItems" :itemSize="50" :delay="150">
|
|
<template v-slot:item="{ item, options }">
|
|
<div :class="['scroll-item p-2', { odd: options.odd }]" style="height: 50px">{{ item }}</div>
|
|
</template>
|
|
</VirtualScroller>
|
|
</div>
|
|
|
|
<div class="flex flex-column mr-3 mt-3">
|
|
<h6>250ms Delay</h6>
|
|
<VirtualScroller :items="basicItems" :itemSize="50" :delay="250">
|
|
<template v-slot:item="{ item, options }">
|
|
<div :class="['scroll-item p-2', { odd: options.odd }]" style="height: 50px">{{ item }}</div>
|
|
</template>
|
|
</VirtualScroller>
|
|
</div>
|
|
</div>
|
|
</div>
|
|
|
|
<div class="card">
|
|
<h5 class="mb-0">Loading</h5>
|
|
<div class="flex align-items-center flex-wrap">
|
|
<div class="flex flex-column mr-3 mt-3">
|
|
<h6>Basic</h6>
|
|
<VirtualScroller :items="basicItems" :itemSize="50" showLoader :delay="250">
|
|
<template v-slot:item="{ item, options }">
|
|
<div :class="['scroll-item p-2', { odd: options.odd }]" style="height: 50px">{{ item }}</div>
|
|
</template>
|
|
</VirtualScroller>
|
|
</div>
|
|
|
|
<div class="flex flex-column mr-3 mt-3">
|
|
<h6>Templating</h6>
|
|
<VirtualScroller class="custom-loading" :items="basicItems" :itemSize="50" showLoader :delay="250">
|
|
<template v-slot:item="{ item, options }">
|
|
<div :class="['scroll-item p-2', { odd: options.odd }]" style="height: 50px">{{ item }}</div>
|
|
</template>
|
|
<template v-slot:loader="{ options }">
|
|
<div :class="['scroll-item p-2', { odd: options.odd }]" style="height: 50px">
|
|
<Skeleton :width="options.even ? '60%' : '50%'" height="1.3rem" />
|
|
</div>
|
|
</template>
|
|
</VirtualScroller>
|
|
</div>
|
|
</div>
|
|
</div>
|
|
|
|
<div class="card">
|
|
<h5 class="mb-0">Lazy</h5>
|
|
<div class="flex align-items-center flex-wrap">
|
|
<div class="flex flex-column mr-3 mt-3">
|
|
<VirtualScroller :items="lazyItems" :itemSize="50" showLoader :delay="250" :loading="lazyLoading" lazy @lazy-load="onLazyLoad">
|
|
<template v-slot:item="{ item, options }">
|
|
<div :class="['scroll-item p-2', { odd: options.odd }]" style="height: 50px">{{ item }}</div>
|
|
</template>
|
|
</VirtualScroller>
|
|
</div>
|
|
</div>
|
|
</div>
|
|
|
|
<div class="card">
|
|
<h5 class="mb-0">Template</h5>
|
|
<div class="flex align-items-center flex-wrap">
|
|
<div class="flex flex-column mr-3 mt-3">
|
|
<VirtualScroller class="custom-loading" :items="basicItems" :itemSize="25 * 7" showLoader :delay="250">
|
|
<template v-slot:item="{ item, options }">
|
|
<div :class="['custom-scroll-item scroll-item', { odd: options.odd }]">
|
|
<div class="flex align-items-center px-2" style="height: 25px">{{ `Item: ${item}` }}</div>
|
|
<div class="flex align-items-center px-2" style="height: 25px">{{ `Index: ${options.index}` }}</div>
|
|
<div class="flex align-items-center px-2" style="height: 25px">{{ `Count: ${options.count}` }}</div>
|
|
<div class="flex align-items-center px-2" style="height: 25px">{{ `First: ${options.first}` }}</div>
|
|
<div class="flex align-items-center px-2" style="height: 25px">{{ `Last: ${options.last}` }}</div>
|
|
<div class="flex align-items-center px-2" style="height: 25px">{{ `Even: ${options.even}` }}</div>
|
|
<div class="flex align-items-center px-2" style="height: 25px">{{ `Odd: ${options.odd}` }}</div>
|
|
</div>
|
|
</template>
|
|
<template v-slot:loader="{ options }">
|
|
<div :class="['custom-scroll-item scroll-item', { odd: options.odd }]">
|
|
<div class="flex align-items-center px-2" style="height: 25px"><Skeleton width="60%" height="1.2rem" /></div>
|
|
<div class="flex align-items-center px-2" style="height: 25px"><Skeleton width="50%" height="1.2rem" /></div>
|
|
<div class="flex align-items-center px-2" style="height: 25px"><Skeleton width="60%" height="1.2rem" /></div>
|
|
<div class="flex align-items-center px-2" style="height: 25px"><Skeleton width="50%" height="1.2rem" /></div>
|
|
<div class="flex align-items-center px-2" style="height: 25px"><Skeleton width="60%" height="1.2rem" /></div>
|
|
<div class="flex align-items-center px-2" style="height: 25px"><Skeleton width="50%" height="1.2rem" /></div>
|
|
<div class="flex align-items-center px-2" style="height: 25px"><Skeleton width="60%" height="1.2rem" /></div>
|
|
</div>
|
|
</template>
|
|
</VirtualScroller>
|
|
</div>
|
|
</div>
|
|
</div>
|
|
</div>
|
|
|
|
<VirtualScrollerDoc />
|
|
</div>
|
|
</template>
|
|
|
|
<script>
|
|
import VirtualScrollerDoc from './VirtualScrollerDoc.vue';
|
|
|
|
export default {
|
|
data() {
|
|
return {
|
|
basicItems: null,
|
|
multiItems: null,
|
|
lazyItems: null,
|
|
lazyLoading: false,
|
|
loadLazyTimeout: null
|
|
};
|
|
},
|
|
mounted() {
|
|
this.basicItems = Array.from({ length: 100000 }).map((_, i) => `Item #${i}`);
|
|
this.multiItems = Array.from({ length: 1000 }).map((_, i) => Array.from({ length: 1000 }).map((_j, j) => `Item #${i}_${j}`));
|
|
this.lazyItems = Array.from({ length: 100000 });
|
|
},
|
|
methods: {
|
|
onLazyLoad(event) {
|
|
this.lazyLoading = true;
|
|
|
|
if (this.loadLazyTimeout) {
|
|
clearTimeout(this.loadLazyTimeout);
|
|
}
|
|
|
|
//imitate delay of a backend call
|
|
this.loadLazyTimeout = setTimeout(() => {
|
|
const { first, last } = event;
|
|
const lazyItems = [...this.lazyItems];
|
|
|
|
for (let i = first; i < last; i++) {
|
|
lazyItems[i] = `Item #${i}`;
|
|
}
|
|
|
|
this.lazyItems = lazyItems;
|
|
this.lazyLoading = false;
|
|
}, Math.random() * 1000 + 250);
|
|
}
|
|
},
|
|
components: {
|
|
VirtualScrollerDoc
|
|
}
|
|
};
|
|
</script>
|
|
|
|
<style lang="scss" scoped>
|
|
.virtualscroller-demo {
|
|
::v-deep(.p-virtualscroller) {
|
|
height: 200px;
|
|
width: 200px;
|
|
border: 1px solid var(--surface-border);
|
|
|
|
.scroll-item {
|
|
background-color: var(--surface-card);
|
|
display: flex;
|
|
align-items: center;
|
|
}
|
|
|
|
.custom-scroll-item {
|
|
flex-direction: column;
|
|
align-items: stretch;
|
|
}
|
|
|
|
.odd {
|
|
background-color: var(--surface-ground);
|
|
}
|
|
}
|
|
|
|
::v-deep(.p-horizontal-scroll) {
|
|
.p-virtualscroller-content {
|
|
display: flex;
|
|
flex-direction: row;
|
|
}
|
|
|
|
.scroll-item {
|
|
writing-mode: vertical-lr;
|
|
}
|
|
}
|
|
|
|
::v-deep(.custom-loading > .p-virtualscroller-loader) {
|
|
display: block;
|
|
}
|
|
}
|
|
</style>
|