51 lines
1.3 KiB
HTML
51 lines
1.3 KiB
HTML
<div class="virtual-list">
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<!-- <div class="virtual-list-viewport" ref:viewport></div> -->
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{{#each $visibleItems as item @key}}
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<VirtualListItem :component
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offset="{{item.offset}}"
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props="{{item.props}}"
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key="{{item.key}}"
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/>
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{{/each}}
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</div>
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<style>
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.virtual-list {
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position: relative;
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}
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</style>
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<script>
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import VirtualListItem from './VirtualListItem'
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import { virtualListStore } from '../_utils/virtualListStore'
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const DISTANCE_FROM_BOTTOM_TO_FIRE = 400
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export default {
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oncreate () {
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this.observe('items', (items) => {
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this.store.set({
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items: items
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})
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})
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this.observe('distanceFromBottom', (distanceFromBottom) => {
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//console.log('distanceFromBottom', distanceFromBottom)
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if (distanceFromBottom > 0 && // hack: the first it's reported, it's always 0
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distanceFromBottom <= DISTANCE_FROM_BOTTOM_TO_FIRE) {
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this.fire('scrollToBottom')
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}
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})
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},
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data: () => ({
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component: null
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}),
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store: () => virtualListStore,
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components: {
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VirtualListItem
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},
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computed: {
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distanceFromBottom: ($scrollHeight, $scrollTop, $offsetHeight) => {
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return $scrollHeight - $scrollTop - $offsetHeight
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}
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}
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}
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</script> |