diff --git a/src/app/hooks/index.ts b/src/app/hooks/index.ts
index f3596569..ff65a4b7 100644
--- a/src/app/hooks/index.ts
+++ b/src/app/hooks/index.ts
@@ -1,4 +1,6 @@
 export * from './useActiveTimout'
+export * from './useAsync'
+export * from './useAsyncFn'
 export * from './useCanvas'
 export * from './useFocus'
 export * from './useHash'
diff --git a/src/app/hooks/useAsync.ts b/src/app/hooks/useAsync.ts
new file mode 100644
index 00000000..e0499022
--- /dev/null
+++ b/src/app/hooks/useAsync.ts
@@ -0,0 +1,17 @@
+import type { Inputs } from 'preact/hooks'
+import { useEffect } from 'preact/hooks'
+import type { AsyncState } from './useAsyncFn'
+import { useAsyncFn } from './useAsyncFn'
+
+export function useAsync<T>(
+	fn: () => Promise<T>,
+	inputs: Inputs = [],
+): AsyncState<T> {
+	const [state, callback] = useAsyncFn<T, () => Promise<T>>(fn, inputs, { loading: true })
+
+	useEffect(() => {
+		callback()
+	}, [callback])
+
+	return state
+}
diff --git a/src/app/hooks/useAsyncFn.ts b/src/app/hooks/useAsyncFn.ts
new file mode 100644
index 00000000..5fe877e5
--- /dev/null
+++ b/src/app/hooks/useAsyncFn.ts
@@ -0,0 +1,59 @@
+import type { Inputs } from 'preact/hooks'
+import { useCallback, useEffect, useRef, useState } from 'preact/hooks'
+
+
+export type AsyncState<T> = {
+	loading: boolean,
+	error?: undefined,
+	value?: undefined,
+} | {
+	loading: true,
+	error?: Error | undefined,
+	value?: T,
+} | {
+	loading: false,
+	error: Error,
+	value?: undefined,
+} | {
+	loading: false,
+	error?: undefined,
+	value: T,
+}
+
+export function useAsyncFn<R, T extends (...args: any[]) => Promise<R>>(
+	fn: T,
+	inputs: Inputs = [],
+	initialState: AsyncState<R> = { loading: false },
+): [AsyncState<R>, (...args: Parameters<T>) => Promise<R | undefined>] {
+	const [state, setState] = useState<AsyncState<R>>(initialState)
+	const isMounted = useRef<boolean>(false)
+	const lastCallId = useRef(0)
+
+	useEffect(() => {
+		isMounted.current = true
+		return () => isMounted.current = false
+	}, [])
+
+	const callback = useCallback((...args: Parameters<T>): Promise<R | undefined> => {
+		const callId = ++lastCallId.current
+		if (!state.loading) {
+			setState(prev => ({ ...prev, loading: true }))
+		}
+
+		return fn(...args).then(
+			value => {
+				if (isMounted.current && callId === lastCallId.current) {
+					setState({ value, loading: false })
+				}
+				return value
+			},
+			error => {
+				if (isMounted.current && callId === lastCallId.current) {
+					setState({ error, loading: false })
+				}
+				return undefined
+			})
+	}, inputs)
+
+	return [state, callback]
+}
diff --git a/src/app/pages/Changelog.tsx b/src/app/pages/Changelog.tsx
index ce31aac4..66d03582 100644
--- a/src/app/pages/Changelog.tsx
+++ b/src/app/pages/Changelog.tsx
@@ -1,7 +1,6 @@
-import { useEffect, useState } from 'preact/hooks'
 import { Ad, ChangelogList, ErrorPanel } from '../components'
 import { useLocale, useTitle } from '../contexts'
-import type { Change } from '../services'
+import { useAsync } from '../hooks'
 import { getChangelogs } from '../services'
 
 interface Props {
@@ -9,20 +8,13 @@ interface Props {
 }
 export function Changelog({}: Props) {
 	const { locale } = useLocale()
-	const [error, setError] = useState<Error | null>(null)
 	useTitle(locale('title.changelog'))
 
-	const [changelogs, setChangelogs] = useState<Change[]>([])
-	useEffect(() => {
-		getChangelogs()
-			.then(changelogs => setChangelogs(changelogs))
-			.catch(e => { console.error(e); setError(e) })
-	}, [])
-
+	const { value: changelogs, error } = useAsync(getChangelogs, [])
 
 	return <main>
 		<Ad type="text" id="changelog" />
-		{error && <ErrorPanel error={error} onDismiss={() => setError(null)} />}
+		{error && <ErrorPanel error={error} />}
 		<div class="changelog">
 			<ChangelogList changes={changelogs} defaultOrder="desc" />
 		</div>
diff --git a/src/app/pages/Guide.tsx b/src/app/pages/Guide.tsx
index 069ef6d3..b382d14e 100644
--- a/src/app/pages/Guide.tsx
+++ b/src/app/pages/Guide.tsx
@@ -6,7 +6,7 @@ import { useCallback, useEffect, useMemo, useState } from 'preact/hooks'
 import config from '../../config.json'
 import { Ad, Btn, BtnMenu, ChangelogTag, Giscus, Octicon } from '../components'
 import { useLocale, useTitle, useVersion } from '../contexts'
-import { useActiveTimeout, useHash } from '../hooks'
+import { useActiveTimeout, useAsync, useHash } from '../hooks'
 import type { VersionId } from '../services'
 import { parseFrontMatter, versionContent } from '../Utils'
 
@@ -30,7 +30,10 @@ export function Guide({ id }: Props) {
 	const { version, changeVersion } = useVersion()
 	const { changeTitle } = useTitle()
 
-	const [content, setContent] = useState<string | undefined>(undefined)
+	const { value: content } = useAsync(async () => {
+		const res = await fetch(`../../guides/${id}.md`)
+		return await res.text()
+	}, [id])
 
 	const frontMatter = useMemo(() => {
 		if (!content) return undefined
@@ -51,14 +54,8 @@ export function Guide({ id }: Props) {
 		return allowedVersions[0]
 	}, [version, frontMatter?.versions])
 
-	const versionedContent = useMemo(() => {
-		if (!content) return undefined
-		const guide = content.substring(content.indexOf('---', 3) + 3)
-		return versionContent(guide, guideVersion)
-	}, [guideVersion, content])
-
 	const html = useMemo(() => {
-		if (!versionedContent) return undefined
+		if (!content) return undefined
 		marked.use({ renderer: {
 			link(href, title, text) {
 				if (href === null) return text
@@ -72,8 +69,10 @@ export function Guide({ id }: Props) {
 				return `<h${level}>${link}${text}</h${level}>`
 			},
 		}})
+		const guide = content.substring(content.indexOf('---', 3) + 3)
+		const versionedContent = versionContent(guide, guideVersion)
 		return marked(versionedContent, { version: '1.19' } as any)
-	}, [versionedContent])
+	}, [guideVersion, content])
 
 	const [hash, setHash] = useHash()
 
@@ -100,14 +99,6 @@ export function Guide({ id }: Props) {
 		}
 	}, [scrollToHeading, hash, version])
 
-	useEffect(() => {
-		(async () => {
-			const res = await fetch(`../../guides/${id}.md`)
-			const text = await res.text()
-			setContent(text)
-		})()
-	}, [id])
-
 	const [shareActive, shareSuccess] = useActiveTimeout()
 
 	const onShare = useCallback(() => {
@@ -116,9 +107,9 @@ export function Guide({ id }: Props) {
 		shareSuccess()
 	}, [id, version])
 
-	const onClickTag = (tag: string) => {
+	const onClickTag = useCallback((tag: string) => {
 		route(`/guides/?tags=${tag}`)
-	}
+	}, [])
 
 	const [largeWidth] = useState(window.innerWidth > 600)
 
diff --git a/src/app/pages/Project.tsx b/src/app/pages/Project.tsx
index 055c70ff..b6df91fd 100644
--- a/src/app/pages/Project.tsx
+++ b/src/app/pages/Project.tsx
@@ -1,4 +1,4 @@
-import { useMemo } from 'preact/hooks'
+import { useCallback, useMemo } from 'preact/hooks'
 import { Ad, TreeView } from '../components'
 import { getFilePath, useLocale, useProject, useTitle } from '../contexts'
 
@@ -11,10 +11,10 @@ export function Project({}: Props) {
 	useTitle(locale('title.project', project.name))
 	const entries = useMemo(() => project.files.map(getFilePath), project.files)
 
-	const selectFile = (entry: string) => {
+	const selectFile = useCallback((entry: string) => {
 		const [, namespace, type, ...id] = entry.split('/')
 		openFile(type, `${namespace}:${id}`)
-	}
+	}, [openFile])
 
 	return <main>
 		<Ad id="data-pack-project" type="text" />
diff --git a/src/app/pages/Sounds.tsx b/src/app/pages/Sounds.tsx
index 97ee7545..b8072640 100644
--- a/src/app/pages/Sounds.tsx
+++ b/src/app/pages/Sounds.tsx
@@ -1,9 +1,10 @@
 import type { Howl, HowlOptions } from 'howler'
-import { useEffect, useRef, useState } from 'preact/hooks'
+import { useEffect, useMemo, useRef, useState } from 'preact/hooks'
 import config from '../../config.json'
 import { Btn, BtnMenu, ErrorPanel, SoundConfig, TextInput } from '../components'
 import { useLocale, useTitle, useVersion } from '../contexts'
-import type { SoundEvents, VersionId } from '../services'
+import { useAsync } from '../hooks'
+import type { VersionId } from '../services'
 import { fetchSounds } from '../services'
 import { hexId } from '../Utils'
 
@@ -13,7 +14,6 @@ interface Props {
 export function Sounds({}: Props) {
 	const { locale } = useLocale()
 	const { version, changeVersion } = useVersion()
-	const [error, setError] = useState<Error | null>(null)
 	useTitle(locale('title.sounds'))
 
 	const [howler, setHowler] = useState<undefined | ((options: HowlOptions) => Howl)>(undefined)
@@ -24,13 +24,10 @@ export function Sounds({}: Props) {
 		})()
 	}, [])
 
-	const [sounds, setSounds] = useState<SoundEvents>({})
-	const soundKeys = Object.keys(sounds ?? {})
-	useEffect(() => {
-		fetchSounds(version)
-			.then(setSounds)
-			.catch(e => { console.error(e); setError(e) })
+	const { value: sounds, error } = useAsync(async () => {
+		return await fetchSounds(version)
 	}, [version])
+	const soundKeys = useMemo(() => Object.keys(sounds ?? {}), [sounds])
 
 	const [search, setSearch] = useState('')
 	const [configs, setConfigs] = useState<SoundConfig[]>([])
@@ -63,7 +60,7 @@ export function Sounds({}: Props) {
 	}
 
 	return <main>
-		{error && <ErrorPanel error={error} onDismiss={() => setError(null)} />}
+		{error && <ErrorPanel error={error} />}
 		{soundKeys.length > 0 && <>
 			<div class="controls sounds-controls">
 				<div class="sound-search-group">
@@ -73,7 +70,7 @@ export function Sounds({}: Props) {
 				</div>
 				{configs.length > 1 && <Btn icon="play" label={ locale('sounds.play_all')} class="play-all-sounds" onClick={playAll} />}
 				<div class="spacer"></div>
-				<Btn icon="download" label={locale('download')} tooltip={locale('sounds.download_function')} class="download-sounds" onClick={downloadFunction} />
+				<Btn icon="download" label={locale('download')} tooltip={locale('sounds.download_function')} tooltipLoc="se" class="download-sounds" onClick={downloadFunction} />
 				<BtnMenu icon="tag" label={version} tooltip={locale('switch_version')}>
 					{config.versions.slice().reverse().map(v =>
 						<Btn label={v.id} active={v.id === version} onClick={() => changeVersion(v.id as VersionId)} />
@@ -81,14 +78,14 @@ export function Sounds({}: Props) {
 				</BtnMenu>
 			</div>
 			<div class="sounds">
-				{howler && configs.map(c =>
+				{sounds && howler && configs.map(c =>
 					<SoundConfig key={c.id} {...c} {...{ howler, sounds, delayedPlay }} onEdit={editConfig(c.id)} onDelete={deleteConfig(c.id)} />
 				)}
 			</div>
 			<a ref={download} style="display: none;"></a>
+			<datalist id="sound-list">
+				{soundKeys.map(s => <option key={s} value={s} />)}
+			</datalist>
 		</>}
-		<datalist id="sound-list">
-			{soundKeys.map(s => <option key={s} value={s} />)}
-		</datalist>
 	</main>
 }
diff --git a/src/app/pages/Versions.tsx b/src/app/pages/Versions.tsx
index 5e38b6fd..319f365b 100644
--- a/src/app/pages/Versions.tsx
+++ b/src/app/pages/Versions.tsx
@@ -1,7 +1,6 @@
-import { useEffect, useState } from 'preact/hooks'
 import { Ad, ErrorPanel, Octicon, VersionDetail, VersionList } from '../components'
 import { useLocale, useTitle } from '../contexts'
-import { useSearchParam } from '../hooks'
+import { useAsync, useSearchParam } from '../hooks'
 import type { VersionMeta } from '../services'
 import { fetchVersions } from '../services'
 
@@ -10,27 +9,21 @@ interface Props {
 }
 export function Versions({}: Props) {
 	const { locale } = useLocale()
-	const [error, setError] = useState<Error | null>(null)
 	useTitle(locale('title.versions'))
 
-	const [versions, setVersions] = useState<VersionMeta[]>([])
-	useEffect(() => {
-		fetchVersions()
-			.then(versions => setVersions(versions))
-			.catch(e => { console.error(e); setError(e) })
-	}, [])
+	const { value: versions, error } = useAsync(fetchVersions, [])
 
 	const [selectedId] = useSearchParam('id')
-	const selected = versions.find(v => v.id === selectedId)
+	const selected = (versions ?? []).find(v => v.id === selectedId)
 
 	useTitle(selected ? selected.name : 'Versions Explorer', selected ? [] : undefined)
 
-	const nextVersion = selected && getOffsetVersion(versions, selected, -1)
-	const previousVersion = selected && getOffsetVersion(versions, selected, 1)
+	const nextVersion = selected && getOffsetVersion(versions ?? [], selected, -1)
+	const previousVersion = selected && getOffsetVersion(versions ?? [], selected, 1)
 
 	return <main>
 		<Ad type="text" id="versions" />
-		{error && <ErrorPanel error={error} onDismiss={() => setError(null)} />}
+		{error && <ErrorPanel error={error} />}
 		<div class="versions">
 			{selectedId ? <>
 				<div class="navigation">
@@ -54,7 +47,7 @@ export function Versions({}: Props) {
 							<p>This version does not exist. Only versions since 1.14 are tracked, or it may be too recent.</p>
 						</div>
 					</div>}
-			</> : <VersionList versions={versions} link={id => `/versions/?id=${id}`} />}
+			</> : <VersionList versions={versions ?? []} link={id => `/versions/?id=${id}`} />}
 		</div>
 	</main>
 }