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	diff --git a/src/components/conversation/conversation.js b/src/components/conversation/conversation.js
	index 30fba1b6b7..1c94fad3a3 100644
	--- a/src/components/conversation/conversation.js
	+++ b/src/components/conversation/conversation.js
	@@ -1,335 +1,347 @@
	import { get } from 'lodash-es'
	import { storeToRefs } from 'pinia'
	import {
	computed,
	onUnmounted,
	provide,
	ref,
	toRefs,
	useTemplateRef,
	watch,
	} from 'vue'
	import { useRouter } from 'vue-router'

	import ChatMessageList from 'src/components/chat_message_list/chat_message_list.vue'
	import PostStatusForm from 'src/components/post_status_form/post_status_form.vue'
	import QuickFilterSettings from 'src/components/quick_filter_settings/quick_filter_settings.vue'
	import QuickViewSettings from 'src/components/quick_view_settings/quick_view_settings.vue'
	import RichContent from 'src/components/rich_content/rich_content.jsx'
	import ThreadTree from 'src/components/thread_tree/thread_tree.vue'

	import { useInterfaceStore } from 'src/stores/interface.js'
	import { useMergedConfigStore } from 'src/stores/merged_config.js'
	import { useStatusesStore } from 'src/stores/statuses.js'

	import { useConversation } from 'src/composables/useConversation.js'
	import { useInterfaceSizes } from 'src/composables/useInterfaceSizes.js'
	import { useScrollPosition } from 'src/composables/useScrollPosition.js'
	import { useTreeConversationTopology } from 'src/composables/useTreeConversationTopology.js'
	import { useVirtualScrolling } from 'src/composables/useVirtualScrolling.js'

	import { WSConnectionStatus } from 'src/api/websocket.js'

	import { library } from '@fortawesome/fontawesome-svg-core'
	import {
	faAngleDoubleDown,
	faAngleDoubleLeft,
	faChevronLeft,
	faReply,
	faTimes,
	} from '@fortawesome/free-solid-svg-icons'

	library.add(
	faAngleDoubleDown,
	faAngleDoubleLeft,
	faChevronLeft,
	faReply,
	faTimes,
	)

	export default {
	props: {
	statusId: {
	// Main thing
	type: String,
	required: true,
	},
	isPage: {
	// Whether conversation is rendered as a standalone page
	// as opposed to embedded into a timeline
	type: Boolean,
	default: false,
	},
	},
	components: {
	ThreadTree,
	QuickFilterSettings,
	QuickViewSettings,
	ChatMessageList,
	PostStatusForm,
	RichContent,
	},
	emits: ['heightChange', 'suspendableStateChange'],
	setup(props, { emit }) {
	const router = useRouter()
	const scroller = useScrollPosition()

	const tryScrollTo = async (id) => {
	if (!id) {
	return
	}
	if (isPage.value) {
	router.push({ name: 'conversation', params: { statusId: id } })
	}
	setFocused(id)
	const target = document.querySelector(`.Status[data-status-id="${id}"]`)
	return await scroller.scrollIntoView(target, { block: 'nearest' })
	}

	// # Main Configuration / global state
	const { mergedConfig } = storeToRefs(useMergedConfigStore())
	const displayStyle = computed(() => mergedConfig.value.conversationDisplay)
	const { layoutType } = storeToRefs(useInterfaceStore())
	const mobileLayout = computed(() => layoutType.value === 'mobile')

	// # Conversation Expansion
	const expanded = ref(false)
	const { isPage } = toRefs(props)
	const isExpanded = computed(() => !!(expanded.value \|\| isPage.value))
	const toggleExpanded = () => {
	expanded.value = !expanded.value
	}
	provide('isExpanded', isExpanded)
	provide('isPage', isPage)
	provide('expandable', true)

	// # Main things
	const { statusId } = toRefs(props)
	const {
	focusedId,
	setFocused,
	currentStatus,
	mainStatus,
	conversation,
	replies,
	getReplies,
	fetchConversation,
	loadError,
	} = useConversation(statusId, isExpanded)
	+ const conversationLite = computed(() => conversation.value.map(({ id }) => ({ id })))

	watch(
	expanded,
	async (value) => {
	if (value) {
	await fetchConversation()
	}
	},
	{ flush: 'post' },
	)

	// Component created
	if (isPage.value) {
	fetchConversation()
	}

	// # Misc UI things
	const firstStatus = computed(() => conversation.value[0])
	const lastStatus = computed(
	() => conversation.value[conversation.value.legnth - 1],
	)
	- const getStatusClasses = (status, ancestor) => {
	+ const getStatusClasses = (statusId, ancestor) => {
	const result = {
	- '-first': status.id === firstStatus.value?.id,
	- '-last': status.id === lastStatus.value?.id,
	+ '-first': statusId === firstStatus.value?.id,
	+ '-last': statusId === lastStatus.value?.id,
	}
	if (ancestor) {
	result['-ancestor'] = true
	result['-fade'] = mergedConfig.value.conversationTreeFadeAncestors
	}
	return result
	}

	// External virtual scrolling
	const unsuspendableIds = ref(new Set())
	const suspendable = computed(
	() => !isExpanded.value && unsuspendableIds.value.size === 0,
	)
	const rootElement = useTemplateRef('root')
	const updateVirtualHeight = (e) => {
	const [entry] = e
	emit('heightChange', {
	id: statusId.value,
	height: entry.contentRect.height,
	element: rootElement,
	})
	}
	const resizeObserver = ref(new ResizeObserver(updateVirtualHeight))
	watch(rootElement, () => resizeObserver.value.observe(rootElement.value))
	watch(suspendable, (value) =>
	emit('suspendableStateChange', { suspend: value, id: statusId.value }),
	)
	onUnmounted(() => resizeObserver.value.disconnect())

	// Placeholder heights.
	const { fontSize } = useInterfaceSizes()
	const mutedStatusHeight = computed(() => fontSize.value * 1.5)
	const normalStatusHeight = computed(() => fontSize.value * 10)
	const getPlaceholderHeight = (id) =>
	conversation.value.find((item) => item.id === id)?.muted
	? mutedStatusHeight
	: normalStatusHeight

	const anchorIds = computed(
	() => new Set([mainStatus.value?.id, currentStatus.value?.id]),
	)

	// # Linear style stuff
	const isLinearView = computed(() => displayStyle.value !== 'tree')
	const linearElement = useTemplateRef('linear')
	const linearScrollCompensation = computed(() => isLinearView.value)
	const {
	heightChart: heightChartLinear,
	changeSuspendState: changeSuspendStateLinear,
	updateVirtualHeight: updateVirtualHeightLinear,
	+ reset: resetLinearScrollVirtualization,
	} = useVirtualScrolling({
	- list: conversation,
	+ context: statusId,
	+ list: conversationLite,
	body: linearElement,
	scrollPositionInstance: scroller,
	scrollCompensation: linearScrollCompensation,
	anchorIds,
	+ collapseMode: 'item',
	getPlaceholderHeight,
	})
	const changeSuspendStateLinearLocal = (e) => {
	changeSuspendStateLinear(e)
	const { id, suspend } = e
	if (suspend) {
	unsuspendableIds.value.add(id)
	} else {
	unsuspendableIds.value.delete(id)
	}
	}

	// # Tree style stuff
	const isTreeView = computed(() => displayStyle.value === 'tree')
	const {
	topLevel,
	currentAncestors,
	threadDisplay,
	showThreadRecursively,
	resetThreadDisplay,
	} = useTreeConversationTopology(conversation, replies, focusedId)
	provide('threadDisplay', threadDisplay)
	watch(
	isExpanded,
	(value) => {
	if (!value) resetThreadDisplay()
	},
	{ flush: 'post' },
	)

	+ const currentAncestorsLite = computed(() => currentAncestors.value.map(({ id }) => ({ id })))
	const ancestorsElement = useTemplateRef('ancestors')
	const treeScrollCompensation = computed(() => isTreeView.value)
	const {
	heightChart: heightChartAncestors,
	changeSuspendState: changeSuspendStateAncestors,
	updateVirtualHeight: updateVirtualHeightAncestors,
	+ reset: resetTreeScrollVirtualization,
	} = useVirtualScrolling({
	- list: currentAncestors,
	+ context: statusId,
	+ list: currentAncestorsLite,
	body: ancestorsElement,
	scrollPositionInstance: scroller,
	scrollCompensation: treeScrollCompensation,
	collapseMode: 'height',
	getPlaceholderHeight,
	})
	const changeSuspendStateAncestorsLocal = (e) => {
	changeSuspendStateAncestors(e)
	const { id, suspend } = e
	if (suspend) {
	unsuspendableIds.value.add(id)
	} else {
	unsuspendableIds.value.delete(id)
	}
	}
	const changeSuspendStateCurrentLevelLocal = (e) => {
	changeSuspendStateLinear(e)
	const { id, suspend } = e
	if (suspend) {
	unsuspendableIds.value.add(id)
	} else {
	unsuspendableIds.value.delete(id)
	}
	}

	+ watch(statusId, (neu, old) => {
	+ resetLinearScrollVirtualization()
	+ resetTreeScrollVirtualization()
	+ })
	+
	const treeViewIsSimple = computed(
	() => !mergedConfig.value.conversationTreeAdvanced,
	)
	const shouldShowAllConversationButton = computed(
	() => currentAncestors.value.length > 0 && topLevel.value.length > 1,
	)
	const shouldShowAncestors = computed(
	() => isExpanded.value && heightChartAncestors.value.length > 0,
	)

	// # Scrolling
	const diveIntoStatus = (id) => tryScrollTo(id)
	const diveToTopLevel = () => tryScrollTo(currentAncestors.value[0].id)

	return {
	// # Misc
	loadError,
	mobileLayout,

	// # Conversation Expansion
	isPage,
	isExpanded,
	toggleExpanded,

	// # Focus
	focusedId,
	setFocused,

	// # Main things
	conversation,
	currentStatus,
	getReplies,

	// # Misc UI things
	getStatusClasses,

	// # Linear style stuff
	isLinearView,

	// ## Linear virtual scrolling
	heightChartLinear,
	changeSuspendStateLinearLocal,
	updateVirtualHeightLinear,

	// # Tree style stuff
	isTreeView,

	// ## Tree virtual scrolling
	heightChartAncestors,
	changeSuspendStateAncestorsLocal,
	updateVirtualHeightAncestors,

	changeSuspendStateCurrentLevelLocal,

	// ## Tree state
	// ### Topology
	topLevel,
	currentAncestors,

	// ### Thread Display
	showThreadRecursively,

	// ### Derived values and config
	treeViewIsSimple,
	shouldShowAllConversationButton,
	shouldShowAncestors,

	// # Scrolling
	diveToTopLevel,
	diveIntoStatus,
	}
	},
	}
	diff --git a/src/components/conversation/conversation.vue b/src/components/conversation/conversation.vue
	index 3b5a967064..7344b8bb72 100644
	--- a/src/components/conversation/conversation.vue
	+++ b/src/components/conversation/conversation.vue
	@@ -1,176 +1,176 @@
	<template>
	<div
	ref="root"
	class="Conversation"
	:class="{ '-expanded' : isExpanded, '-page': isPage, 'panel' : isExpanded }"
	>
	<div
	v-if="isExpanded"
	class="panel-heading conversation-heading -sticky"
	>
	<h1 class="title">
	<RichContent
	v-if="conversation[0]?.summary_raw_html"
	:html="conversation[0].summary_raw_html"
	:emoji="conversation[0].emojis"
	/>
	<template v-else>
	{{ $t('timeline.conversation') }}
	</template>
	</h1>
	<button
	v-if="!isPage"
	class="button-unstyled -link"
	@click.prevent="toggleExpanded"
	>
	{{ $t('timeline.collapse') }}
	</button>
	<QuickFilterSettings
	v-if="isPage && mobileLayout"
	:conversation="true"
	class="rightside-button"
	/>
	<QuickViewSettings
	v-if="isPage"
	:conversation="true"
	class="rightside-button"
	/>
	</div>
	<div
	v-if="isPage && !currentStatus"
	class="conversation-body"
	ref="body"
	:class="{ 'panel-body': isExpanded }"
	>
	<p v-if="!loadError">
	<FAIcon
	spin
	icon="circle-notch"
	/>
	{{ $t('status.loading') }}
	</p>
	<p v-else>
	{{ $t('status.load_error', { error: loadError }) }}
	</p>
	</div>
	<div
	v-else
	class="conversation-body"
	ref="body"
	:class="{ 'panel-body': isExpanded }"
	>
	<div
	v-if="isTreeView"
	class="thread-body"
	>
	<div
	v-if="shouldShowAllConversationButton"
	class="conversation-dive-to-top-level-box"
	>
	<i18n-t
	keypath="currentStatus.show_all_conversation_with_icon"
	tag="button"
	class="button-unstyled -link"
	scope="global"
	@click.prevent="diveToTopLevel"
	>
	<template #icon>
	<FAIcon
	icon="angle-double-left"
	/>
	</template>
	<template #text>
	<span>
	{{ $t('status.show_all_conversation', { numStatus: topLevel.length - 1 }, topLevel.length - 1) }}
	</span>
	</template>
	</i18n-t>
	</div>
	<div
	v-if="shouldShowAncestors"
	ref="ancestors"
	class="thread-ancestors"
	>
	<template
	v-for="element in heightChartAncestors"
	:key="element.id"
	>
	<Status
	v-if="element.type === 'item'"
	class="conversation-status panel-body"
	- :class="getStatusClasses(element.item, true)"
	+ :class="getStatusClasses(element.id, true)"

	- :status-id="element.item.id"
	- :replies="getReplies(element.item.id)"
	+ :status-id="element.id"
	+ :replies="getReplies(element.id)"

	- :focused="focusedId === element.item.id"
	+ :focused="focusedId === element.id"
	conversation-rank="ancestor"
	:data-status-id="element.id"
	:data-vs-height="element.height"
	:data-vs-top="element.top"

	@goto="setFocused"
	- @dive="diveIntoStatus(element.item.id)"
	+ @dive="diveIntoStatus(element.id)"
	@suspendable-state-change="changeSuspendStateAncestorsLocal"
	@height-change="updateVirtualHeightAncestors"
	/>
	<div
	v-if="element.type === 'spacer'"
	class="virtual-spacer"
	:style="{ height: element.height + 'px' }"
	aria-hidden="true"
	/>
	</template>
	</div>
	<ThreadTree
	:status-id="currentStatus.id"
	:depth="0"

	@goto="setFocused"
	@dive="diveIntoStatus"
	@toggle-expanded="toggleExpanded"
	@show-thread-recursively="showThreadRecursively"
	@suspendable-state-change="changeSuspendStateCurrentLevelLocal"
	/>
	</div>
	<div
	v-else-if="isLinearView"
	ref="linear"
	class="thread-body"
	>
	<template
	v-for="element in heightChartLinear"
	:key="element.id"
	>
	<Status
	v-if="element.type === 'item'"
	class="panel-body conversation-status"
	- :class="getStatusClasses(element.item)"
	- :status-id="element.item.id"
	- :replies="getReplies(element.item.id)"
	+ :class="getStatusClasses(element.id)"
	+ :status-id="element.id"
	+ :replies="getReplies(element.id)"

	- :focused="focusedId === element.item.id \|\| focusedId === element.item.retweeted_status?.id"
	+ :focused="focusedId === element.id"

	:data-status-id="element.id"
	:data-vs-height="element.height"
	:data-vs-top="element.top"

	@goto="setFocused"
	@toggle-expanded="toggleExpanded"
	@suspendable-state-change="changeSuspendStateLinearLocal"
	@height-change="updateVirtualHeightLinear"
	/>
	<div
	v-if="element.type === 'spacer'"
	aria-hidden="true"
	class="panel-body virtual-spacer"
	:style="{ height: element.height + 'px' }"
	/>
	</template>
	</div>
	</div>
	</div>
	</template>

	<script src="./conversation.js"></script>
	<style src="./conversation.scss" />
	diff --git a/src/composables/useConversation.js b/src/composables/useConversation.js
	index d449e0798a..1251cb0424 100644
	--- a/src/composables/useConversation.js
	+++ b/src/composables/useConversation.js
	@@ -1,175 +1,165 @@
	import { get } from 'lodash-es'
	import { storeToRefs } from 'pinia'
	import { computed, provide, ref, watch } from 'vue'

	import { useMergedConfigStore } from 'src/stores/merged_config.js'
	import { useOAuthStore } from 'src/stores/oauth.js'
	import { useStatusesStore } from 'src/stores/statuses.js'
	import { useStreamingStore } from 'src/stores/streaming.js'

	import { useMainStatus } from 'src/composables/useMainStatus.js'

	import {
	fetchConversation as apiFetchConversation,
	fetchStatus as apiFetchStatus,
	} from 'src/api/public.js'

	export function useConversation(statusId, expanded) {
	const loadError = ref(null)
	const { status: currentStatus, mainStatus } = useMainStatus(statusId)

	// # Config
	const { mergedConfig } = storeToRefs(useMergedConfigStore())
	const { mastoUserSocketStatus } = storeToRefs(useStreamingStore())
	const streamingEnabled = computed(
	() =>
	mergedConfig.value.useStreamingApi &&
	mastoUserSocketStatus === WSConnectionStatus.JOINED,
	)

	// # Focus
	const focusedId = ref(null)
	const { mainStatus: focusedStatus } = useMainStatus(focusedId)
	const setFocused = (id) => {
	focusedId.value = id
	- console.log('SF', id)
	}
	provide('focusedId', focusedId)

	watch(mainStatus, (newStatus, oldStatus) => {
	- setFocused(newStatus.id)
	- const newConversationId = newStatus?.statusnet_conversation_id
	- const oldConversationId = oldStatus?.statusnet_conversation_id
	- if (
	- newConversationId &&
	- oldConversationId &&
	- newConversationId === oldConversationId
	- ) {
	- } else {
	- // resetDisplayState()
	- // fetchConversation()
	- }
	+ if (newStatus) setFocused(newStatus.id)
	+ fetchConversation()
	})
	+
	watch(expanded, (value) => {
	setFocused(value ? statusId.value : null)
	}, { immediate: true })

	watch(
	focusedStatus,
	(newVal, oldVal) => {
	if (!newVal) return
	if (newVal?.id === oldVal?.id) return // prevents infinite loop
	if (!streamingEnabled.value) {
	useStatusesStore().fetchStatus(newVal.id)
	}

	useStatusesStore().fetchFavsAndRepeats(newVal.id)
	useStatusesStore().fetchEmojiReactions(newVal.id)
	},
	{ immediate: true },
	)

	const sortById = (a, b) => {
	const idA = a.type === 'retweet' ? a.retweeted_status.id : a.id
	const idB = b.type === 'retweet' ? b.retweeted_status.id : b.id
	const seqA = Number(idA)
	const seqB = Number(idB)
	const isSeqA = !Number.isNaN(seqA)
	const isSeqB = !Number.isNaN(seqB)
	if (isSeqA && isSeqB) {
	return seqA < seqB ? -1 : 1
	} else if (isSeqA && !isSeqB) {
	return -1
	} else if (!isSeqA && isSeqB) {
	return 1
	} else {
	return idA < idB ? -1 : 1
	}
	}
	const conversationId = computed(
	() => mainStatus.value.statusnet_conversation_id,
	)
	const conversation = computed(() => {
	if (!currentStatus.value) {
	return []
	}

	if (!expanded.value) {
	return [currentStatus.value]
	}

	const conversation = useStatusesStore().conversations.get(
	conversationId.value,
	)

	return [...conversation.keys()]
	.map((k) => useStatusesStore().allStatuses.get(k))
	.filter((status) => status.type != 'repeat') // Old backend behavior?
	.toSorted(sortById)
	})
	const replies = computed(() =>
	conversation.value.reduce(
	(result, { id, in_reply_to_status_id: irid }, index) => {
	if (irid) {
	if (!result.has(irid)) {
	result.set(irid, new Set())
	}
	result.get(irid).add({
	name: `#${index}`,
	id,
	})
	}
	return result
	},
	new Map(),
	),
	)
	const getReplies = (id) => replies.value.get(id) ?? new Set()
	provide('conversation', conversation)
	provide('replies', replies)

	const fetchConversation = async () => {
	if (currentStatus.value) {
	const {
	data: { ancestors, descendants },
	timestamp,
	} = await apiFetchConversation({
	id: statusId.value,
	credentials: useOAuthStore().token,
	})

	useStatusesStore().addNewStatuses({ statuses: ancestors, timestamp })
	useStatusesStore().addNewStatuses({
	statuses: descendants,
	timestamp,
	})
	} else {
	try {
	loadError.value = null

	const { data: status } = await apiFetchStatus({
	id: statusId.value,
	credentials: useOAuthStore().token,
	})

	useStatusesStore().addNewStatuses({ statuses: [status] })
	fetchConversation()
	} catch (error) {
	console.error(error)
	loadError.value = error
	}
	}
	}

	return {
	focusedId,
	setFocused,
	currentStatus,
	mainStatus,
	conversation,
	replies,
	getReplies,
	fetchConversation,
	loadError,
	}
	}
	diff --git a/src/composables/useVirtualScrolling.js b/src/composables/useVirtualScrolling.js
	index d466fc059e..864b0cf7b0 100644
	--- a/src/composables/useVirtualScrolling.js
	+++ b/src/composables/useVirtualScrolling.js
	@@ -1,245 +1,256 @@
	-import { last } from 'lodash-es'
	+import { last, first } from 'lodash-es'
	import { computed, nextTick, ref, toValue, watch } from 'vue'

	import { useWindowSize } from 'src/composables/useWindowSize.js'

	export function useVirtualScrolling({
	// List of items
	list,
	// Container of items, used for measuring scroll position
	body,
	// useScrollPosition composable, used to prevent dupicating instances
	scrollPositionInstance,
	// buffer zone, the amount of placeholder heights to include
	buffer,
	// whether to use scroll compensation when elements above anchor change
	// set to 'positive' to only compensate for positive increase (useful when
	// combined with infinite scroll)
	scrollCompensation,
	// How to handle collapse/expansion (going from 0 elements to full and back)
	// - false - don't do scroll compensation at all
	// - 'height' - compensate scroll according to list's height
	+ // - 'item' - same as height but uses anchor element's top offset
	+ // instead of whole height
	collapseMode,
	// Anchor. Set of IDs of element relative to which do scroll compensation
	anchorIds,
	// Placeholder height specification. Must be a function.
	// function will be called either:
	// - without arguments (for generic placeholder, i.e. buffer zone size)
	// - with id (for specific item placeholders)
	// function must return ref pointing to height
	getPlaceholderHeight,
	}) {
	// # Suspension
	const unsuspendibleIds = ref(new Set())
	const changeSuspendState = ({ id, suspend }) => {
	if (!suspend) {
	unsuspendibleIds.value.add(id)
	} else {
	unsuspendibleIds.value.delete(id)
	}
	}

	// # Heights mapping.
	const heights = ref(new Map())
	const heightChart = computed(() => {
	// Map every height and suspendable state
	const chart = list.value.map((item) => {
	const { id } = item
	const height = (() => {
	if (heights.value.has(id)) {
	return heights.value.get(id)
	} else {
	return getPlaceholderHeight(id).value
	}
	})()
	const suspendable = !unsuspendibleIds.value.has(id)
	- return { id, height, suspendable, item }
	+ const real = heights.value.has(id)
	+ return { id, height, suspendable, real }
	})

	// Walk over the list to set top offsets
	chart.reduce((sum, item) => {
	item.top = sum
	return sum + item.height
	}, 0)

	return chart
	})
	const updateVirtualHeight = ({ id, height }) => {
	heights.value.set(id, height)
	}

	- // ## Scroll compensation
	const { y: scrollY, scrollBy } = scrollPositionInstance
	- watch(heightChart, async (newVal, oldVal) => {
	- if (!toValue(scrollCompensation)) return
	- if (newVal.length === 0 && oldVal.length === 0) return
	- pauseWatchers()
	-
	- const expansion = oldVal.length === 0 && newVal.length !== 0
	- const collapse = oldVal.length !== 0 && newVal.length === 0
	-
	- const diff = (() => {
	- if (expansion \|\| collapse) {
	- if (toValue(collapseMode) === 'height') {
	- const oldBottomElement = last(oldVal)
	- const newBottomElement = last(newVal)
	-
	- if (expansion) {
	- return newBottomElement.top + newBottomElement.height
	- } else if (collapse) {
	- return 0 - oldBottomElement.top - oldBottomElement.height
	- }
	- }
	- return 0
	- } else if (toValue(anchorIds) != null) {
	- const anchorOld = oldVal.find(({ id }) => toValue(anchorIds).has(id))
	- const anchorNew = newVal.find(({ id }) => toValue(anchorIds).has(id))
	- if (anchorOld == null) {
	- throw new Error('Anchor not found!')
	- }
	-
	- const disappeared = anchorOld != null && anchorNew == null
	- if (disappeared) {
	- throw new Error('Anchor disappeared!')
	- }
	-
	- return anchorNew.top - anchorOld.top
	- } else {
	- return 0
	- }
	- })()
	-
	- console.log(diff)
	- if (diff !== 0) {
	- // Scroll by amount offset changed to keep it in view
	- topScrollBoundary.value += diff
	- bottomScrollBoundary.value += diff
	- await nextTick()
	- await scrollBy(0, diff)
	- }
	-
	- resumeWatchers()
	- })
	-
	const { height: windowHeight } = useWindowSize()

	// Real scroll boundary, relative to body's bounds
	const topScrollBoundary = ref(0)
	const bottomScrollBoundary = ref(0)

	const updateBoundaries = () => {
	if (!body.value) return // Not mounted yet

	const { top } = body.value.getBoundingClientRect()

	const distanceItemTopToWindowTop = 0 - top
	const distanceItemTopToWindowBottom = windowHeight.value - top

	// Technically, bottom scroll boundary should be distance
	// from element's top border to window's bottom border,
	// but it just so happens that it is equal to this.
	// You can verify it by drawing the boxes and measuring
	// distances yourself, I know I did. Geometry, man...
	topScrollBoundary.value = distanceItemTopToWindowTop
	bottomScrollBoundary.value = distanceItemTopToWindowBottom
	}

	const windowWatcher = watch(windowHeight, updateBoundaries)
	const scrollWatcher = watch(scrollY, updateBoundaries)
	const heightWatcher = watch(heightChart, updateBoundaries)
	const bodyWatcher = watch(body, updateBoundaries)

	const pauseWatchers = () => {
	windowWatcher.pause()
	scrollWatcher.pause()
	heightWatcher.pause()
	bodyWatcher.pause()
	}
	const resumeWatchers = (skipUpdate = false) => {
	windowWatcher.resume()
	scrollWatcher.resume()
	heightWatcher.resume()
	bodyWatcher.resume()
	if (skipUpdate) return
	updateBoundaries()
	}

	// # Visiblity
	// Add buffer zone to boundary, equal to approx 3 items heights
	const bufferZone = computed(
	() => getPlaceholderHeight().value * (toValue(buffer) ?? 3),
	)

	- const heightChartGrouped = computed(() => {
	- // Determine visibility state
	- const chart = heightChart.value.map((heightChartItem) => {
	- const itemTopBoundary = heightChartItem.top
	- const itemBottomBoundary = heightChartItem.top + heightChartItem.height
	-
	- // Include buffer zone
	- const finalTopScrollBoundary = topScrollBoundary.value - bufferZone.value
	- const finalBottomScrollBoundary =
	- bottomScrollBoundary.value + bufferZone.value
	-
	- // To be visible, item's bottom boundary shoud be below top scroll boundary)
	- const isBelowTopBoundary = itemBottomBoundary > finalTopScrollBoundary
	- // To be visible, item's top boundary shoud be above bottom scroll boundary)
	- const isAboveBottomBoundary = itemTopBoundary < finalBottomScrollBoundary
	- // This accounts for the case where item's boundaries exceed scroll boundary
	-
	- return {
	- ...heightChartItem,
	- visible: isBelowTopBoundary && isAboveBottomBoundary,
	+ const checkVisible = ({ top, height }) => {
	+ const itemTopBoundary = top
	+ const itemBottomBoundary = top + height
	+
	+ // Include buffer zone
	+ const finalTopScrollBoundary = topScrollBoundary.value - bufferZone.value
	+ const finalBottomScrollBoundary = bottomScrollBoundary.value + bufferZone.value
	+
	+ // To be visible, item's bottom boundary shoud be below top scroll boundary)
	+ const isBelowTopBoundary = itemBottomBoundary > finalTopScrollBoundary
	+ // To be visible, item's top boundary shoud be above bottom scroll boundary)
	+ const isAboveBottomBoundary = itemTopBoundary < finalBottomScrollBoundary
	+ // This accounts for the case where item's boundaries exceed scroll boundary
	+
	+ return isBelowTopBoundary && isAboveBottomBoundary
	+ }
	+
	+ const heightChartVisibility = computed(() =>
	+ heightChart.value.map((heightChartItem) => ({
	+ ...heightChartItem,
	+ visible: checkVisible(heightChartItem),
	+ }))
	+ )
	+
	+ // ## Scroll compensation
	+ watch(
	+ heightChart,
	+ async (newVal, oldVal) => {
	+ if (!toValue(scrollCompensation)) return
	+ if (newVal.length === 0 && oldVal.length === 0) return
	+
	+ const diff = (() => {
	+ const expansion = oldVal.length === 0 && newVal.length !== 0
	+ const collapse = oldVal.length !== 0 && newVal.length === 0
	+
	+ if (expansion) {
	+ if (toValue(collapseMode) === 'height') {
	+ const newBottomElement = last(newVal)
	+
	+ return newBottomElement.top + newBottomElement.height
	+ } else if (toValue(collapseMode) === 'item') {
	+ const element = newVal.find(({ id }) => toValue(anchorIds).has(id))
	+
	+ return element.top
	+ } else {
	+ return 0
	+ }
	+ } else if (collapse) {
	+ const oldBottomElement = last(oldVal)
	+
	+ return 0 - oldBottomElement.top - oldBottomElement.height
	+ } else {
	+ console.log('COMPENSATE', oldVal, newVal, topScrollBoundary.value)
	+ const oldVisible = oldVal.filter((item) => checkVisible(item))
	+ const oldItem = first(oldVisible)
	+ const oldItemUpdated = newVal.find(({ id }) => id === oldItem.id)
	+ console.log('OLD', oldItem, oldItemUpdated)
	+ if (!oldItemUpdated) return 0 // context change?
	+ return oldItemUpdated.top - oldItem.top - (oldItem.height - oldItemUpdated.height)
	+ }
	+ })()
	+
	+ if (diff !== 0) {
	+ console.log('DIFF', diff)
	+ // Scroll by amount offset changed to keep it in view
	+ topScrollBoundary.value += diff
	+ bottomScrollBoundary.value += diff
	+ await scrollBy(0, diff)
	+ await nextTick()
	}
	- })

	+ resumeWatchers()
	+ },
	+ { flush: 'post' }
	+ )
	+
	+ const heightChartGrouped = computed(() =>
	// Group invisible items into spacers
	- return chart.reduce((acc, heightChartItem) => {
	- const { suspendable, visible, height, top, bottom, id, item } =
	+ heightChartVisibility.value.reduce((acc, heightChartItem) => {
	+ const { suspendable, visible, height, top, bottom, id } =
	heightChartItem
	// Bottom value isn't really used otherwise for debugging
	const present = visible \|\| !suspendable
	if (present) {
	- return [...acc, { type: 'item', height, top, bottom, id, item }]
	+ return [...acc, { type: 'item', height, top, bottom, id }]
	} else {
	// Reusing previous item if possible
	const previousItem = acc[acc.length - 1]
	const usingPreviousItem = previousItem?.type === 'spacer'
	// We only really care for height and id of spacer, everything else
	// is just for debugging
	const spacer = usingPreviousItem
	? previousItem
	: {
	type: 'spacer',
	top: Number.POSITIVE_INFINITY,
	bottom: Number.POSITIVE_INFINITY,
	height: 0,
	ids: new Set(),
	}

	spacer.ids.add(id)
	spacer.id = [...spacer.ids].join() // used for v-for key attribute
	spacer.height += height

	if (top < spacer.top) spacer.top = top
	if (bottom < spacer.bottom) spacer.bottom = bottom

	// If we used previous item there is no need to push it to array
	if (usingPreviousItem) {
	return acc
	} else {
	return [...acc, spacer]
	}
	}
	}, [])
	- })
	+ )
	+
	+ const reset = async () => {
	+ unsuspendibleIds.value = new Set()
	+ heights.value = new Map()
	+ }

	return {
	heightChart: heightChartGrouped,
	changeSuspendState,
	updateVirtualHeight,
	pauseWatchers,
	resumeWatchers,
	updateBoundaries,
	+ reset,
	}
	}

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