pinafore/routes/_components/timeline/Timeline.html

<div class="timeline" role="feed" aria-label="{{label}}">
  <VirtualList component="{{StatusListItem}}"
               :makeProps
               items="{{$statusIds}}"
               on:scrollToBottom="onScrollToBottom()"
               shown="{{$initialized}}"
               footerComponent="{{LoadingFooter}}"
               showFooter="{{$initialized && $runningUpdate}}"
               realm="{{$currentInstance + '/' + timeline}}"
               on:initializedVisibleItems="initialize()"
  />
</div>
<style>
  .timeline {
    min-height: 60vh;
  }
</style>
<script>
  import { store } from '../../_utils/store'
  import StatusListItem from './StatusListItem.html'
  import LoadingFooter from './LoadingFooter.html'
  import VirtualList from '../virtualList/VirtualList.html'
  import { timelines } from '../../_static/timelines'
  import { database } from '../../_utils/database/database'
  import { initializeTimeline, fetchStatusesOnScrollToBottom, setupTimeline } from '../../_actions/timeline'

  export default {
    async oncreate() {
      setupTimeline()
    },
    data: () => ({
      StatusListItem: StatusListItem,
      LoadingFooter: LoadingFooter
    }),
    computed: {
      makeProps: ($currentInstance) => (statusId) => database.getStatus($currentInstance, statusId),
      label: (timeline, $currentInstance) => {
        if (timelines[timeline]) {
          `${timelines[timeline].label} timeline for ${$currentInstance}`
        } else if (timeline.startsWith('tag/')) {
          let tag = timeline.split('/').slice(-1)[0]
          return `#${tag} timeline for ${$currentInstance}`
        } else if (timeline.startsWith('account/')) {
          let account = timeline.split('/').slice(-1)[0]
          return `Account #${account} on ${$currentInstance}`
        }
      }
    },
    store: () => store,
    components: {
      VirtualList
    },
    methods: {
      initialize() {
        if (this.store.get('initialized') || !this.store.get('statusIds') || !this.store.get('statusIds').length) {
          return
        }
        initializeTimeline()
      },
      async onScrollToBottom() {
        if (!this.store.get('initialized') || this.store.get('runningUpdate')) {
          return
        }
        fetchStatusesOnScrollToBottom()
      }
    }
  }
</script>