diff --git a/.changeset/six-donkeys-warn.md b/.changeset/six-donkeys-warn.md
new file mode 100644
index 0000000..cfd264c
--- /dev/null
+++ b/.changeset/six-donkeys-warn.md
@@ -0,0 +1,5 @@
+---
+'svelte-podcast': minor
+---
+
+switch to jsdoc from ts
diff --git a/.github/workflows/publish.yml b/.github/workflows/publish.yml
index 7b0c41e..43a28b4 100644
--- a/.github/workflows/publish.yml
+++ b/.github/workflows/publish.yml
@@ -75,12 +75,14 @@ jobs:
          - name: Install dependencies
            run: yarn install  --frozen-lockfile
 
+         - name: Package svelte src/lib
+           run: yarn run package
+
          - name: Create Release Pull Request or Publish to npm
            id: changesets
            uses: changesets/action@v1
            with:
-              # This expects you to have a script called release which does a build for your packages and calls changeset publish
-              publish: yarn release
+              publish: yarn run release
            env:
               GITHUB_TOKEN: ${{ secrets.TOKEN }}
               NPM_TOKEN: ${{ secrets.NPM_TOKEN }}
diff --git a/.vscode/settings.json b/.vscode/settings.json
index d16cc42..e6dca7c 100644
--- a/.vscode/settings.json
+++ b/.vscode/settings.json
@@ -25,7 +25,6 @@
 		"**/*.map": true,
 		"**/.turbo": true,
 		"**/.vercel": true,
-		"**/dist": true,
 		"**/node_modules": true,
 		"**/tsconfig.tsbuildinfo": true,
 		"**/.npmrc": true
diff --git a/package.json b/package.json
index 1b08cf2..cd51ddc 100644
--- a/package.json
+++ b/package.json
@@ -13,7 +13,7 @@
 	},
 	"scripts": {
 		"dev": "vite dev",
-		"build": "vite build && yarn package",
+		"build": "vite build",
 		"preview": "vite preview",
 		"package": "svelte-kit sync && svelte-package && publint",
 		"sync": "svelte-kit sync",
@@ -23,7 +23,7 @@
 		"lint:eslint": "TIMING=1 eslint . --ext .ts,.tsx,.svelte --cache",
 		"lint": "yarn lint:prettier && yarn lint:eslint",
 		"format": "prettier --write --plugin-search-dir=. .",
-		"release": "yarn package && changeset publish",
+		"release": "changeset publish",
 		"ts": "tsc --pretty --noImplicitAny --noEmit"
 	},
 	"exports": {
@@ -36,11 +36,13 @@
 		"dist"
 	],
 	"peerDependencies": {
-		"svelte": ">=3.00.0"
+		"@sveltejs/kit": ">=1.0.0",
+		"svelte": ">=3.0.0"
 	},
 	"dependencies": {
 		"@inqling/svelte-icons": "^3.3.2",
 		"clsx": "^1.2.1",
+		"esm-env": "^1.0.0",
 		"just-clamp": "^4.2.0",
 		"svelte-local-storage-store": "^0.5.0"
 	},
diff --git a/src/content/example/add-loader.svelte b/src/content/example/add-loader.svelte
index 1bdecd7..d4ee0b8 100644
--- a/src/content/example/add-loader.svelte
+++ b/src/content/example/add-loader.svelte
@@ -1,8 +1,8 @@
 <script>
-	import { Audio } from 'svelte-podcast';
+	import { AudioContext } from 'svelte-podcast';
 </script>
 
-<Audio />
+<AudioContext />
 
 <!-- your layout -->
 
diff --git a/src/lib/audio/component.svelte b/src/lib/audio/context.svelte
similarity index 95%
rename from src/lib/audio/component.svelte
rename to src/lib/audio/context.svelte
index d28c306..050f4e9 100644
--- a/src/lib/audio/component.svelte
+++ b/src/lib/audio/context.svelte
@@ -1,4 +1,4 @@
-<script lang="ts">
+<script>
 	import { onMount } from 'svelte';
 	import { get } from 'svelte/store';
 	import { user_preferences } from '../user';
@@ -6,11 +6,6 @@
 	import { audio_element } from './stores/audio-element';
 
 	$: $audio_element;
-	/* onMount(() => {
-	return audio_element.subscribe((el) => {
-		if (el) info('mounted audio element :: ', el);
-	});
-}); */
 
 	onMount(() => {
 		return user_preferences.subscribe((prefs) => {
diff --git a/src/lib/audio/index.js b/src/lib/audio/index.js
new file mode 100644
index 0000000..d6e4354
--- /dev/null
+++ b/src/lib/audio/index.js
@@ -0,0 +1,9 @@
+/**
+ * Audio context module.
+ * @module audio
+ */
+
+export { default as AudioContext } from './context.svelte';
+export { default as AudioPlayer } from './player.svelte';
+export { default as AudioProgress } from './progress.svelte';
+export { episode_audio, episode_details, episode_progress } from './stores';
diff --git a/src/lib/audio/index.ts b/src/lib/audio/index.ts
deleted file mode 100644
index 5e5fd00..0000000
--- a/src/lib/audio/index.ts
+++ /dev/null
@@ -1,2 +0,0 @@
-export { default as Audio } from './component.svelte';
-export { episode_audio, episode_details, episode_progress } from './stores';
diff --git a/src/lib/components/player.svelte b/src/lib/audio/player.svelte
similarity index 82%
rename from src/lib/components/player.svelte
rename to src/lib/audio/player.svelte
index e6b9966..6b11851 100644
--- a/src/lib/components/player.svelte
+++ b/src/lib/audio/player.svelte
@@ -1,13 +1,16 @@
-<script lang="ts">
+<script>
 	import { onMount } from 'svelte';
 	import { AudioProgress } from '.';
 	import { episode_audio, episode_progress } from '../audio';
-	import type { EpisodeDetails } from '../audio/stores';
 	import { user_preferences } from '../user';
 	import { seconds_to_timestamp } from '../utility';
 
-	export let src: string | undefined;
-	export let metadata: EpisodeDetails = {};
+	/** @type {string|undefined} */
+	export let src;
+
+	/** @type {import('../audio/stores').EpisodeDetails} */
+	export let metadata = {};
+
 	let mounted = false;
 
 	$: is_loaded = Boolean($episode_audio?.src);
@@ -33,19 +36,19 @@
 	 * Skips the audio forward by a specified number of seconds.
 	 * @param {number} seconds - The number of seconds to skip forward.
 	 */
-	const skip_forward = (seconds: number) => episode_audio.skip(seconds, 'forward');
+	const skip_forward = (seconds) => episode_audio.skip(seconds, 'forward');
 
 	/**
 	 * Skips the audio backward by a specified number of seconds.
 	 * @param {number} seconds - The number of seconds to skip backward.
 	 */
-	const skip_back = (seconds: number) => episode_audio.skip(seconds, 'backward');
+	const skip_back = (seconds) => episode_audio.skip(seconds, 'backward');
 
 	/**
 	 * Seeks to a specific time in the audio.
 	 * @param {number} value - The time to seek to, in seconds.
 	 */
-	const seek_to = (value: number) => episode_audio.seek(value);
+	const seek_to = (value) => episode_audio.seek(value);
 
 	/**
 	 * Toggles the audio playback between play and pause.
diff --git a/src/lib/components/progress.svelte b/src/lib/audio/progress.svelte
similarity index 82%
rename from src/lib/components/progress.svelte
rename to src/lib/audio/progress.svelte
index fe2228b..b801294 100644
--- a/src/lib/components/progress.svelte
+++ b/src/lib/audio/progress.svelte
@@ -1,4 +1,4 @@
-<script lang="ts">
+<script>
 	import { episode_audio, episode_progress } from '../audio';
 	import { announce } from '../utility';
 
@@ -6,13 +6,19 @@
 
 	let was_paused = true;
 
-	function handle_drag_start(t: string) {
+	/**
+	 * @param {string} t - The type of event that triggered the drag end.
+	 */
+	function handle_drag_start(t) {
 		announce.info('drag_start :: ', t);
 		was_paused = $episode_audio?.is_paused || true;
 		episode_audio.pause();
 	}
 
-	function handle_drag_end(t: string) {
+	/**
+	 * @param {string} t - The type of event that triggered the drag end.
+	 */
+	function handle_drag_end(t) {
 		announce.info('drag_end :: ', t);
 		if (was_paused) return;
 		else episode_audio.play();
diff --git a/src/lib/audio/stores/audio-element.js b/src/lib/audio/stores/audio-element.js
new file mode 100644
index 0000000..4afc3e3
--- /dev/null
+++ b/src/lib/audio/stores/audio-element.js
@@ -0,0 +1,50 @@
+/**
+ * @typedef {Object} UserPreferences
+ * @property {number} playback_rate - The playback rate of the audio element.
+ * @property {number} volume - The volume of the audio element.
+ */
+import { BROWSER } from 'esm-env';
+import { onMount } from 'svelte';
+import { get, readable } from 'svelte/store';
+import { user_preferences } from '../../user';
+
+/**
+ * A readable store that provides an HTMLAudioElement instance.
+ * @type {import('svelte/store').Readable<HTMLAudioElement | undefined>}
+ * @exports audio_element
+ */
+export const audio_element = readable(undefined, (set) => {
+	if (!BROWSER) return;
+	const ID = 'svpod--generated-audio-element';
+
+	onMount(() => {
+		const existing_element = document.getElementById(ID);
+
+		/** @type {HTMLAudioElement} */
+		const el =
+			existing_element instanceof HTMLAudioElement
+				? existing_element
+				: document.createElement('audio');
+
+		el.id = ID;
+		el.setAttribute('preload', 'metadata');
+		el.muted = false;
+		el.autoplay = false;
+		el.controls = false;
+
+		/** @type {UserPreferences} */
+		const preferences = get(user_preferences);
+		el.playbackRate = preferences.playback_rate;
+		el.volume = preferences.volume;
+
+		if (!existing_element) document.body.appendChild(el);
+
+		// @ts-expect-error - I'm not sure how to fix this using JSDOC
+		set(el);
+	});
+
+	return () => {
+		const element = document.getElementById(ID);
+		element ? element.remove() : null;
+	};
+});
diff --git a/src/lib/audio/stores/audio-element.ts b/src/lib/audio/stores/audio-element.ts
deleted file mode 100644
index d05f922..0000000
--- a/src/lib/audio/stores/audio-element.ts
+++ /dev/null
@@ -1,32 +0,0 @@
-import { browser } from '$app/environment';
-import { onMount } from 'svelte';
-import { get, readable } from 'svelte/store';
-import { user_preferences } from '../../user';
-
-export const audio_element = readable<HTMLAudioElement | null>(null, (set) => {
-	if (!browser) return;
-	const ID = 'svpod--generated-audio-element';
-
-	onMount(() => {
-		const existing_element = document.getElementById(ID) as HTMLAudioElement | null;
-		const el = existing_element || document.createElement('audio');
-
-		el.id = ID;
-		el.setAttribute('preload', 'metadata');
-		el.muted = false;
-		el.autoplay = false;
-		el.controls = false;
-
-		const preferences = get(user_preferences);
-		el.playbackRate = preferences.playback_rate;
-		el.volume = preferences.volume;
-
-		if (!existing_element) document.body.appendChild(el);
-		set(el);
-	});
-
-	return () => {
-		const element = document.getElementById(ID);
-		element ? element.remove() : null;
-	};
-});
diff --git a/src/lib/audio/stores/episode-data.ts b/src/lib/audio/stores/episode-data.js
similarity index 70%
rename from src/lib/audio/stores/episode-data.ts
rename to src/lib/audio/stores/episode-data.js
index a0c4dd5..5aab084 100644
--- a/src/lib/audio/stores/episode-data.ts
+++ b/src/lib/audio/stores/episode-data.js
@@ -1,29 +1,33 @@
 import clamp from 'just-clamp';
-import { derived, get, type Readable } from 'svelte/store';
+import { derived, get } from 'svelte/store';
 import { user_preferences, user_progress } from '../../user';
 import { announce } from '../../utility';
 import { audio_element } from './audio-element';
-import { episode_details, type EpisodeDetails } from './episode-details';
+import { episode_details } from './episode-details';
 
-export type EpisodeState = {
-	will_autoplay: boolean;
-	is_paused: boolean;
-	duration: number;
-	src: string;
-	start_at: number;
-	details: EpisodeDetails | null;
-};
+/**
+ * Episode state object
+ * @typedef {Object} EpisodeState
+ * @property {boolean} will_autoplay - Whether the episode will autoplay
+ * @property {boolean} is_paused - Whether the episode is paused
+ * @property {number} duration - The duration of the episode
+ * @property {string} src - The source of the episode
+ * @property {number} start_at - The starting point of the episode
+ * @property {import('./episode-details').EpisodeDetails | null} details - The details of the episode or null if there are none
+ */
 
+/** @type {Omit<EpisodeState, 'src'>} */
 const default_episode_state = {
 	will_autoplay: false,
 	is_paused: true,
 	duration: 0,
 	start_at: 0,
 	details: null,
-} satisfies Omit<EpisodeState, 'src'>;
+};
 
 /**
  * Episode state store
+ * @type {import('svelte/store').Readable<EpisodeState | null>}
  */
 const episode_state = derived([audio_element, episode_details], ([$audio, $details], set) => {
 	if (!$audio) return set(null);
@@ -50,9 +54,11 @@ const episode_state = derived([audio_element, episode_details], ([$audio, $detai
 		$audio.removeEventListener('pause', set_value);
 		$audio.removeEventListener('playing', set_value);
 	};
-}) satisfies Readable<EpisodeState | null>;
+});
 
-type HANDLE_TYPE = 'toggle' | 'set';
+/**
+ * @typedef {'toggle' | 'set'} HANDLE_TYPE
+ */
 
 /**
  * Use audio element
@@ -60,7 +66,7 @@ type HANDLE_TYPE = 'toggle' | 'set';
  * @returns {HTMLAudioElement} - Audio element
  * @throws {string} - Error message if no audio element exists
  */
-const use_element = (action: string): HTMLAudioElement => {
+const use_element = (action) => {
 	const el = get(audio_element);
 	if (!el) throw announce.warn(`could not ${action} :: no audio element exists yet`);
 	return el;
@@ -69,9 +75,10 @@ const use_element = (action: string): HTMLAudioElement => {
 /**
  * Load audio
  * @param {string} src - Audio source
- * @param {EpisodeDetails} details - Episode details
+ * @param {import('./episode-details').EpisodeDetails } details - Episode details
+ * @returns {void}
  */
-const load_audio = (src: string, details: EpisodeDetails): void => {
+const load_audio = (src, details) => {
 	user_progress.save();
 	const el = use_element('load');
 	el.src = src;
@@ -91,8 +98,9 @@ const load_audio = (src: string, details: EpisodeDetails): void => {
 
 /**
  * Unload audio
+ * @returns {void}
  */
-const unload_audio = (): void => {
+const unload_audio = () => {
 	user_progress.save();
 	const el = use_element('unload');
 	el.src = '';
@@ -102,8 +110,9 @@ const unload_audio = (): void => {
 /**
  * Play audio
  * @param {HANDLE_TYPE} t - Handle type
+ * @returns {void}
  */
-const play_audio = (t: HANDLE_TYPE = 'set'): void => {
+const play_audio = (t = 'set') => {
 	const el = use_element('play');
 
 	if (t === 'toggle') {
@@ -116,8 +125,9 @@ const play_audio = (t: HANDLE_TYPE = 'set'): void => {
 /**
  * Pause audio
  * @param {HANDLE_TYPE} t - Handle type
+ * @returns {void}
  */
-const pause_audio = (t: HANDLE_TYPE = 'set'): void => {
+const pause_audio = (t = 'set') => {
 	user_progress.save();
 	const el = use_element('pause');
 
@@ -131,8 +141,9 @@ const pause_audio = (t: HANDLE_TYPE = 'set'): void => {
 /**
  * Mute audio
  * @param {HANDLE_TYPE} t - Handle type
+ * @returns {void}
  */
-const mute_audio = (t: HANDLE_TYPE = 'set'): void => {
+const mute_audio = (t = 'set') => {
 	const el = use_element('mute');
 
 	if (t === 'toggle') {
@@ -145,8 +156,9 @@ const mute_audio = (t: HANDLE_TYPE = 'set'): void => {
 /**
  * Unmute audio
  * @param {HANDLE_TYPE} t - Handle type
+ * @returns {void}
  */
-const unmute_audio = (t: HANDLE_TYPE = 'set'): void => {
+const unmute_audio = (t = 'set') => {
 	const el = use_element('unmute');
 
 	if (t === 'toggle') {
@@ -159,9 +171,10 @@ const unmute_audio = (t: HANDLE_TYPE = 'set'): void => {
 /**
  * Seek to time audio
  * @param {number} seconds - Seconds to seek
- * @param {'from-start' | 'from-end'} from - Seek from start or end
+ * @param {'from-start' | 'from-end'} [from="from-start"] - Seek from start or end
+ * @returns {void}
  */
-const seek_audio = (seconds: number, from: 'from-start' | 'from-end' = 'from-start'): void => {
+const seek_audio = (seconds, from = 'from-start') => {
 	const el = use_element('seek');
 
 	if (from === 'from-end') {
@@ -174,9 +187,10 @@ const seek_audio = (seconds: number, from: 'from-start' | 'from-end' = 'from-sta
 /**
  * Skip by about audio
  * @param {number} seconds - Seconds to skip
- * @param {'forward' | 'backward'} type - Skip forward or backward
+ * @param {'forward' | 'backward'} [type='forward'] - Skip forward or backward
+ * @returns {void}
  */
-const skip_audio = (seconds: number, type: 'forward' | 'backward' = 'forward'): void => {
+const skip_audio = (seconds, type = 'forward') => {
 	const el = use_element('skip');
 
 	if (type === 'backward') {
diff --git a/src/lib/audio/stores/episode-details.js b/src/lib/audio/stores/episode-details.js
new file mode 100644
index 0000000..677bfe5
--- /dev/null
+++ b/src/lib/audio/stores/episode-details.js
@@ -0,0 +1,12 @@
+import { writable } from 'svelte/store';
+
+/**
+ * @typedef {Object.<string, unknown>} EpisodeDetails
+ */
+
+/**
+ * Episode details store.
+ * @type {import('svelte/store').Writable<EpisodeDetails | null>}
+ * @description This store holds the metadata for a single episode.
+ */
+export const episode_details = writable(null);
diff --git a/src/lib/audio/stores/episode-details.ts b/src/lib/audio/stores/episode-details.ts
deleted file mode 100644
index ffae550..0000000
--- a/src/lib/audio/stores/episode-details.ts
+++ /dev/null
@@ -1,12 +0,0 @@
-import { writable } from 'svelte/store';
-
-export interface EpisodeDetails {
-	[key: string]: string | number | boolean;
-}
-
-/**
- * Episode details store.
- *
- * @returns {Writable<EpisodeDetails>} A Svelte writable store that contains metadata for the current episode.
- */
-export const episode_details = writable<EpisodeDetails | null>(null);
diff --git a/src/lib/audio/stores/episode-progress.ts b/src/lib/audio/stores/episode-progress.js
similarity index 53%
rename from src/lib/audio/stores/episode-progress.ts
rename to src/lib/audio/stores/episode-progress.js
index 6e8c44d..61a1ed7 100644
--- a/src/lib/audio/stores/episode-progress.ts
+++ b/src/lib/audio/stores/episode-progress.js
@@ -1,23 +1,28 @@
-import { derived, type Readable } from 'svelte/store';
-import { seconds_to_timestamp } from '../../utility';
+import { seconds_to_timestamp } from 'svelte-podcast/utility';
 import { audio_element } from './audio-element';
+import { derived } from 'svelte/store';
 
-export type EpisodeProgress = {
-	current_time: number;
-	timestamp: string;
-	has_ended: boolean;
-};
+/**
+ * Episode progress object.
+ * @typedef {Object} EpisodeProgress
+ * @property {number} current_time - The current time of the episode in seconds.
+ * @property {string} timestamp - The current time of the episode in the format 'mm:ss'.
+ * @property {boolean} has_ended - Whether the episode has ended or not.
+ */
 
+/**
+ * The default episode progress object.
+ * @type {EpisodeProgress}
+ */
 const default_episode_progress = {
 	current_time: 0,
 	timestamp: '00:00',
 	has_ended: false,
-} satisfies EpisodeProgress;
+};
 
 /**
- * Episode progress store.
- *
- * @returns {Readable<EpisodeProgress>} A Svelte readable store that contains the current progress of the audio episode.
+ * The default episode progress object.
+ * @type {import('svelte/store').Readable<EpisodeProgress>}
  */
 export const episode_progress = derived(audio_element, ($audio, set) => {
 	if (!$audio) return set(default_episode_progress);
@@ -40,4 +45,4 @@ export const episode_progress = derived(audio_element, ($audio, set) => {
 	 * Remove event listener.
 	 */
 	return () => $audio.removeEventListener('timeupdate', () => set_value());
-}) satisfies Readable<EpisodeProgress>;
+});
diff --git a/src/lib/audio/stores/index.ts b/src/lib/audio/stores/index.js
similarity index 100%
rename from src/lib/audio/stores/index.ts
rename to src/lib/audio/stores/index.js
diff --git a/src/lib/components/index.ts b/src/lib/components/index.ts
deleted file mode 100644
index c2bbe38..0000000
--- a/src/lib/components/index.ts
+++ /dev/null
@@ -1,2 +0,0 @@
-export { default as AudioPlayer } from './player.svelte';
-export { default as AudioProgress } from './progress.svelte';
diff --git a/src/lib/index.js b/src/lib/index.js
new file mode 100644
index 0000000..05b5d68
--- /dev/null
+++ b/src/lib/index.js
@@ -0,0 +1,4 @@
+export * from './audio';
+export { AudioPlayer as default } from './audio';
+export * from './user';
+export * from './utility';
diff --git a/src/lib/index.ts b/src/lib/index.ts
deleted file mode 100644
index 64c9bff..0000000
--- a/src/lib/index.ts
+++ /dev/null
@@ -1,5 +0,0 @@
-export * from './audio';
-export * from './components';
-export { AudioPlayer as default } from './components';
-export * from './user';
-export * from './utility';
diff --git a/src/lib/user/index.ts b/src/lib/user/index.js
similarity index 58%
rename from src/lib/user/index.ts
rename to src/lib/user/index.js
index 1bfb9b3..09b7a3b 100644
--- a/src/lib/user/index.ts
+++ b/src/lib/user/index.js
@@ -1,2 +1,7 @@
+/**
+ * User storage module.
+ * @module user
+ */
+
 export * from './user-preferences';
 export * from './user-progress';
diff --git a/src/lib/user/user-preferences.js b/src/lib/user/user-preferences.js
new file mode 100644
index 0000000..5bed762
--- /dev/null
+++ b/src/lib/user/user-preferences.js
@@ -0,0 +1,82 @@
+import clamp from 'just-clamp';
+import { persisted } from 'svelte-local-storage-store';
+
+/**
+ * @typedef {Object} UserPreferences
+ * @property {number} playback_rate - The audio player playback rate (speed)
+ * @property {number} volume - The audio player volume
+ */
+
+/**
+ * The default user preferences
+ * @type {UserPreferences}
+ */
+const DEFAULT_USER_PREFERENCES = { playback_rate: 1, volume: 1 };
+
+/**
+ * The user preferences store
+ * @type {import('svelte/store').Writable<UserPreferences>}
+ */
+const USER_PREFERENCES_STORE = persisted('USER_PREFERENCE', DEFAULT_USER_PREFERENCES);
+
+/**
+ * Sets the playback rate for the user
+ * @param {number} value - The playback rate value
+ * @returns {void}
+ */
+const set_playback_rate = (value) => {
+	const playback_rate = clamp(value, 0.5, 5);
+	return USER_PREFERENCES_STORE.update((prefs) => ({ ...prefs, playback_rate }));
+};
+
+/**
+ * Sets the volume for the user
+ * @param {number} value - The volume value
+ * @returns {void}
+ */
+const set_volume = (value) => {
+	const volume = clamp(value, 0, 1);
+	return USER_PREFERENCES_STORE.update((prefs) => ({ ...prefs, volume }));
+};
+
+/**
+ * Clears user preferences store
+ */
+const clear_store = () => USER_PREFERENCES_STORE.set(DEFAULT_USER_PREFERENCES);
+
+/**
+ * @typedef {Object} UserPreferencesObject
+ * @property {typeof USER_PREFERENCES_STORE.subscribe} subscribe - Subscribes to the user preferences store
+ * @property {typeof set_playback_rate} set_playback_rate - Sets the playback rate for the user
+ * @property {typeof set_volume} set_volume - Sets the volume for the user
+ * @property {typeof clear_store} clear - Clears saved user preferences
+ */
+
+/**
+ * The user preferences object
+ * @type {UserPreferencesObject}
+ */
+export const user_preferences = {
+	/**
+	 * Subscribes to user preferences store
+	 */
+	subscribe: USER_PREFERENCES_STORE.subscribe,
+
+	/**
+	 * Sets the playback rate for the user
+	 * @type {typeof set_playback_rate}
+	 */
+	set_playback_rate,
+
+	/**
+	 * Sets the volume for the user
+	 * @type {typeof set_volume}
+	 */
+	set_volume,
+
+	/**
+	 * Clears user preferences store
+	 * @type {typeof clear_store}
+	 */
+	clear: clear_store,
+};
diff --git a/src/lib/user/user-preferences.ts b/src/lib/user/user-preferences.ts
deleted file mode 100644
index c7f5095..0000000
--- a/src/lib/user/user-preferences.ts
+++ /dev/null
@@ -1,49 +0,0 @@
-import clamp from 'just-clamp';
-import { persisted } from 'svelte-local-storage-store';
-
-export interface UserPreferences {
-	playback_rate: number;
-	volume: number;
-}
-
-const default_user_preferences = { playback_rate: 1, volume: 1 };
-const user_preferences_store = persisted<UserPreferences>(
-	'USER_PREFERENCE',
-	default_user_preferences,
-);
-
-/**
- * Sets the playback rate for the user
- * @param value - The playback rate value
- * @returns A Promise that resolves with the updated user preferences
- */
-const set_playback_rate = (value: number) => {
-	const playback_rate = clamp(value, 0.5, 5);
-	return user_preferences_store.update((prefs) => ({ ...prefs, playback_rate }));
-};
-
-/**
- * Sets the volume for the user
- * @param value - The volume value
- * @returns A Promise that resolves with the updated user preferences
- */
-const set_volume = (value: number) => {
-	const volume = clamp(value, 0, 1);
-	return user_preferences_store.update((prefs) => ({ ...prefs, volume }));
-};
-
-/**
- * Clears user preferences store
- */
-const clear_store = () => user_preferences_store.set(default_user_preferences);
-
-export const user_preferences = {
-	/**
-	 * Subscribes to user preferences store
-	 */
-	subscribe: user_preferences_store.subscribe,
-
-	set_playback_rate,
-	set_volume,
-	clear: clear_store,
-};
diff --git a/src/lib/user/user-progress.js b/src/lib/user/user-progress.js
new file mode 100644
index 0000000..8343749
--- /dev/null
+++ b/src/lib/user/user-progress.js
@@ -0,0 +1,77 @@
+import { persisted } from 'svelte-local-storage-store';
+import { get } from 'svelte/store';
+import { episode_audio, episode_progress } from '../audio';
+import { announce, use_url } from '../utility';
+
+/**
+ * User progress object type.
+ * This object acts as a dictionary with string keys and number values.
+ * @typedef {Object.<string, number>} UserProgress
+ */
+
+/**
+ * Default user progress object
+ * @type {UserProgress}
+ */
+const DEFAULT_USER_PROGRESS = {};
+import {} from 'svelte-local-storage-store';
+/**
+ * User progress store
+ * @type {import('svelte/store').Writable<UserProgress>}
+ */
+const USER_PROGRESS_STORE = persisted('USER_PROGRESS', DEFAULT_USER_PROGRESS);
+
+/**
+ * Saves user progress
+ * @function
+ * @returns {void}
+ */
+const save_user_progress = () => {
+	const audio = get(episode_audio);
+	if (!audio?.src) return;
+
+	announce.info('saving progress: ', audio.src);
+
+	const pathname = use_url(audio.src).pathname;
+	const current_time = get(episode_progress).current_time;
+	USER_PROGRESS_STORE.update((prev) => ({ ...prev, [pathname]: current_time }));
+};
+
+/**
+ * Gets user progress for a given audio source
+ * @function
+ * @param {string} src - Audio source
+ * @returns {number|undefined} - User progress for the given audio source, or undefined if not found
+ */
+const get_user_progress = (src) => {
+	const pathname = use_url(src).pathname;
+
+	const store = get(USER_PROGRESS_STORE);
+
+	/**@type {number|undefined} */
+	const value = store[pathname];
+
+	return value;
+};
+
+/**
+ * Clears user progress store
+ * @function
+ * @returns {void}
+ */
+const clear_user_progress = () => USER_PROGRESS_STORE.set(DEFAULT_USER_PROGRESS);
+
+/**
+ * User progress object
+ * @namespace
+ * @property {function} subscribe - Subscribes to user progress store
+ * @property {function} get - Gets user progress for a given audio source
+ * @property {function} clear - Clears user progress store
+ * @property {function} save - Saves user progress
+ */
+export const user_progress = {
+	subscribe: USER_PROGRESS_STORE.subscribe,
+	get: get_user_progress,
+	clear: clear_user_progress,
+	save: save_user_progress,
+};
diff --git a/src/lib/user/user-progress.ts b/src/lib/user/user-progress.ts
deleted file mode 100644
index e1a5864..0000000
--- a/src/lib/user/user-progress.ts
+++ /dev/null
@@ -1,53 +0,0 @@
-import { persisted } from 'svelte-local-storage-store';
-import { get } from 'svelte/store';
-import { episode_audio, episode_progress } from '../audio';
-import { announce, use_url } from '../utility';
-
-export type UserProgress = {
-	[key: string]: number;
-};
-
-const default_user_progress = {};
-const user_progress_store = persisted<UserProgress>('USER_PROGRESS', default_user_progress);
-
-/**
- * Saves user progress
- */
-const save = () => {
-	const audio = get(episode_audio);
-	if (!audio?.src) return;
-
-	announce.info('saving progress: ', audio.src);
-
-	const pathname = use_url(audio.src).pathname;
-	const current_time = get(episode_progress).current_time;
-	user_progress_store.update((prev) => ({ ...prev, [pathname]: current_time }));
-};
-
-/**
- * Gets user progress for a given audio source
- * @param {string} src - Audio source
- * @returns {number} - User progress for the given audio source
- */
-const get_user_progress = (src: string) => {
-	const pathname = use_url(src).pathname;
-	const store = get(user_progress_store) as UserProgress;
-
-	return store[pathname];
-};
-
-/**
- * Clears user progress store
- */
-const clear_user_progress = () => user_progress_store.set(default_user_progress);
-
-export const user_progress = {
-	/**
-	 * Subscribes to user preferences store
-	 */
-	subscribe: user_progress_store.subscribe,
-
-	get: get_user_progress,
-	clear: clear_user_progress,
-	save,
-};
diff --git a/src/lib/utility/announce.js b/src/lib/utility/announce.js
new file mode 100644
index 0000000..82ebf94
--- /dev/null
+++ b/src/lib/utility/announce.js
@@ -0,0 +1,67 @@
+import { DEV } from 'esm-env';
+
+/**
+ * Object containing logger functions.
+ * @typedef {Object} Announce
+ * @property {function} info - Log info like events and data.
+ * @property {function} warn - Log warnings for developers.
+ * @property {function} error - Log errors for critical failures.
+ */
+
+/**
+ * Type of logger.
+ * @typedef {('info' | 'error' | 'warn')} Logger
+ */
+
+/**
+ * Object containing Logger functions.
+ *
+ * @type {Readonly<{[K in Logger]: Function}>}
+ */
+const use_logger = Object.freeze({
+	info: console.info,
+	error: console.error,
+	warn: console.warn,
+});
+
+/**
+ * Log function.
+ * @param {Logger} type - Type of logger.
+ * @param {...unknown} content - Content to log.
+ */
+function log(type, ...content) {
+	const logger = use_logger[type];
+
+	// If type is info and not in dev mode, return early
+	if (type === 'info' && !DEV) return;
+
+	// Log message
+	logger(
+		'%c🔊 svelte-podcast:',
+		'color: #FF3E00; background-color: rgba(255, 62, 0, 0.15); padding: 4px 8px; border-radius:4px;',
+		...content,
+	);
+}
+
+/**
+ * Object containing logger functions.
+ * @type {Announce}
+ * @exports announce
+ */
+export const announce = {
+	/**
+	 * Log an info message.
+	 * @param {...unknown} content - Content to log.
+	 */
+	info: (...content) => log('info', ...content),
+	/**
+	 * Log a warning message.
+	 * @param {...unknown} content - Content to log.
+	 */
+	warn: (...content) => log('warn', ...content),
+	/**
+	 * Log an error message.
+	 * @param {...unknown} content - Content to log.
+	 */
+	error: (...content) => log('error', ...content),
+};
diff --git a/src/lib/utility/announce.ts b/src/lib/utility/announce.ts
deleted file mode 100644
index 0bae90a..0000000
--- a/src/lib/utility/announce.ts
+++ /dev/null
@@ -1,49 +0,0 @@
-import { dev } from '$app/environment';
-
-const use_logger = {
-	info: console.info,
-	error: console.error,
-	warn: console.warn,
-};
-
-type Logger = keyof typeof use_logger;
-
-/**
- * Log function.
- * @param type - Type of logger.
- * @param content - Content to log.
- */
-function log(type: Logger, ...content: unknown[]) {
-	const logger = use_logger[type];
-
-	// If type is info and not in dev mode, return
-	if (type === 'info' && !dev) return;
-
-	// Log message
-	logger(
-		'%c🔊 svelte-podcast:',
-		'color: #FF3E00; background-color: rgba(255, 62, 0, 0.15); padding: 4px 8px; border-radius:4px;',
-		...content,
-	);
-}
-
-/**
- * Object containing logger functions.
- */
-export const announce = {
-	/**
-	 * Log info message.
-	 * @param content - Content to log.
-	 */
-	info: (...content: unknown[]) => log('info', ...content),
-	/**
-	 * Log warning message.
-	 * @param content - Content to log.
-	 */
-	warn: (...content: unknown[]) => log('warn', ...content),
-	/**
-	 * Log error message.
-	 * @param content - Content to log.
-	 */
-	error: (...content: unknown[]) => log('error', ...content),
-};
diff --git a/src/lib/utility/index.ts b/src/lib/utility/index.js
similarity index 62%
rename from src/lib/utility/index.ts
rename to src/lib/utility/index.js
index 5ee58a3..353b40f 100644
--- a/src/lib/utility/index.ts
+++ b/src/lib/utility/index.js
@@ -1,3 +1,8 @@
+/**
+ * Utility functions module.
+ * @module utility
+ */
+
 export * from './announce';
 export * from './seconds-to-timestamp';
 export * from './use-url';
diff --git a/src/lib/utility/seconds-to-timestamp.ts b/src/lib/utility/seconds-to-timestamp.js
similarity index 59%
rename from src/lib/utility/seconds-to-timestamp.ts
rename to src/lib/utility/seconds-to-timestamp.js
index 37d14fd..0db6d53 100644
--- a/src/lib/utility/seconds-to-timestamp.ts
+++ b/src/lib/utility/seconds-to-timestamp.js
@@ -1,10 +1,10 @@
 /**
  * Returns a string timestamp in the format of "hh:mm:ss" from a given number of seconds.
- * @param seconds - The number of seconds to convert to a timestamp.
- * @param force_hours - Whether to always include hours in the timestamp, even if it's 0.
- * @returns A string timestamp in the format of "hh:mm:ss".
+ * @param {number} seconds - The number of seconds to convert to a timestamp.
+ * @param {boolean} [force_hours=false] - Whether to always include hours in the timestamp, even if it's 0.
+ * @returns {string} A string timestamp in the format of "hh:mm:ss".
  */
-export function seconds_to_timestamp(seconds: number, force_hours = false) {
+export function seconds_to_timestamp(seconds, force_hours = false) {
 	const hours = Math.floor(seconds / 3600);
 	const hours_remainder = seconds % 3600;
 
@@ -22,10 +22,10 @@ export function seconds_to_timestamp(seconds: number, force_hours = false) {
 
 /**
  * Returns a string representation of a number with a leading 0 if it's less than 10.
- * @param num - The number to format.
- * @returns A string representation of the number with a leading 0 if it's less than 10.
+ * @param {number} num - The number to format.
+ * @returns {string} A string representation of the number with a leading 0 if it's less than 10.
  */
-function section(num: number) {
+function section(num) {
 	if (num < 10) return `0${num}`;
 	return num.toString();
 }
diff --git a/src/lib/utility/use-url.js b/src/lib/utility/use-url.js
new file mode 100644
index 0000000..69c049e
--- /dev/null
+++ b/src/lib/utility/use-url.js
@@ -0,0 +1,31 @@
+/**
+ * @typedef {Object} RelativeURL
+ * @property {string} pathname - The pathname of the URL.
+ * @property {string} search - The search string of the URL.
+ * @property {string} hash - The hash string of the URL.
+ * @property {URLSearchParams} searchParams - The search parameters of the URL.
+ */
+
+/**
+ * Converts a string to a URL object. If the string is not a valid URL, it will be appended to the Svelte website URL.
+ * @param {string} href - The string to convert to a URL object.
+ * @returns {URL} A URL object.
+ */
+const string_to_url = (href) => {
+	try {
+		return new URL(href);
+	} catch (e) {
+		return new URL(href, 'https://svelte.dev');
+	}
+};
+
+/**
+ * Parses a URL string and returns an object containing its pathname, search, hash, and searchParams.
+ * @param {string} href - The URL string to parse.
+ * @returns {RelativeURL} An object containing the pathname, search, hash, and searchParams of the URL.
+ */
+export const use_url = (href) => {
+	const { pathname, search, hash, searchParams } = string_to_url(href);
+
+	return { pathname, search, hash, searchParams };
+};
diff --git a/src/lib/utility/use-url.ts b/src/lib/utility/use-url.ts
deleted file mode 100644
index e0af1be..0000000
--- a/src/lib/utility/use-url.ts
+++ /dev/null
@@ -1,23 +0,0 @@
-/**
- * Converts a string to a URL object. If the string is not a valid URL, it will be appended to the Svelte website URL.
- * @param href - The string to convert to a URL object.
- * @returns A URL object.
- */
-const string_to_url = (href: string) => {
-	try {
-		return new URL(href);
-	} catch (e) {
-		return new URL(href, 'https://svelte.dev');
-	}
-};
-
-/**
- * Parses a URL string and returns an object containing its pathname, search, hash, and searchParams.
- * @param href - The URL string to parse.
- * @returns An object containing the pathname, search, hash, and searchParams of the URL.
- */
-export const use_url = (href: string) => {
-	const { pathname, search, hash, searchParams } = string_to_url(href);
-
-	return { pathname, search, hash, searchParams } as const;
-};
diff --git a/src/routes/+layout.svelte b/src/routes/+layout.svelte
index e1ad3a6..1726c90 100644
--- a/src/routes/+layout.svelte
+++ b/src/routes/+layout.svelte
@@ -4,7 +4,7 @@
 	import { Github } from '@inqling/svelte-icons/simple-icons';
 	import clsx from 'clsx';
 	import 'highlight.js/styles/github-dark.css';
-	import { Audio } from 'svelte-podcast';
+	import { AudioContext } from 'svelte-podcast';
 	import '../app.postcss';
 
 	const page_links = [
@@ -62,6 +62,6 @@
 	</div>
 </header>
 
-<Audio />
+<AudioContext />
 
 <slot />