0.3.5

- uses prop instead of attempting to read env variable
- uses URL type instead of custom heuristics

package.json

@@ -4,7 +4,7 @@
 		"type": "git",
 		"url": "https://gitea.auvem.com/svelte-toolkit/sui.git"
 	},
-	"version": "0.2.15",
+	"version": "0.3.5",
 	"scripts": {
 		"dev": "vite dev",
 		"build": "vite build && pnpm run prepack",
@@ -40,12 +40,12 @@
 	},
 	"peerDependencies": {
 		"@sveltejs/kit": "^2.20.2",
-		"svelte": "^5.0.0",
-		"tailwindcss": "^4.1.11",
-		"tailwindcss-animate": "^1.0.7",
 		"@tailwindcss/container-queries": "^0.1.1",
 		"@tailwindcss/forms": "^0.5.10",
-		"@tailwindcss/vite": "^4.1.11"
+		"@tailwindcss/vite": "^4.1.11",
+		"svelte": "^5.0.0",
+		"tailwindcss": "^4.1.11",
+		"tailwindcss-animate": "^1.0.7"
 	},
 	"dependencies": {
 		"@internationalized/date": "^3.8.2",
@@ -56,7 +56,8 @@
 		"match-sorter": "^8.0.0",
 		"melt": "^0.37.0",
 		"moment": "^2.30.1",
-		"phosphor-svelte": "^3.0.1"
+		"phosphor-svelte": "^3.0.1",
+		"tinyduration": "^3.4.1"
 	},
 	"devDependencies": {
 		"@eslint/compat": "^1.2.5",

pnpm-lock.yaml

@@ -59,6 +59,9 @@ importers:
       tailwindcss-animate:
         specifier: ^1.0.7
         version: 1.0.7(tailwindcss@4.1.11)
+      tinyduration:
+        specifier: ^3.4.1
+        version: 3.4.1
     devDependencies:
       '@eslint/compat':
         specifier: ^1.2.5
@@ -1539,6 +1542,9 @@ packages:
     resolution: {integrity: sha512-5S7Va8hKfV7W5U6g3aYxXmlPoZVAwUMy9AOKyF2fVuZa2UD3qZjg578OrLRt8PcNN1PleVaL/5/yYATNL0ICUw==}
     engines: {node: '>=18'}
 
+  tinyduration@3.4.1:
+    resolution: {integrity: sha512-NemFoamVYn7TmtwZKZ3OiliM9fZkr6EWiTM+wKknco6POSy2gS689xx/pXip0JYp40HXpUw6k65CUYHWYUXdaA==}
+
   tinyglobby@0.2.14:
     resolution: {integrity: sha512-tX5e7OM1HnYr2+a2C/4V0htOcSQcoSTH9KgJnVvNm5zm/cyEWKJ7j7YutsH9CxMdtOkkLFy2AHrMci9IM8IPZQ==}
     engines: {node: '>=12.0.0'}
@@ -2917,6 +2923,8 @@ snapshots:
       mkdirp: 3.0.1
       yallist: 5.0.0
 
+  tinyduration@3.4.1: {}
+
   tinyglobby@0.2.14:
     dependencies:
       fdir: 6.4.6(picomatch@4.0.3)

src/lib/Banner.svelte

@@ -0,0 +1,228 @@
+<script lang="ts" module>
+	export interface BannerAPI {
+		/** opens the banner */
+		open: () => void;
+		/** closes the banner */
+		close: () => void;
+		/** returns whether the banner is open */
+		isOpen: () => boolean;
+		/** disables banner controls */
+		disable: () => void;
+		/** enables banner controls */
+		enable: () => void;
+		/** returns whether the banner controls are disabled */
+		isDisabled: () => boolean;
+		/** freezes banner state (cannot be dismissed) */
+		freeze: () => void;
+		/** unfreezes banner state */
+		unfreeze: () => void;
+		/** returns whether the banner is frozen */
+		isFrozen: () => boolean;
+	}
+
+	type BannerControlButton = {
+		label?: string;
+		class?: ClassValue;
+		/** if framed is false, FramelessButton is used instead of Button */
+		framed?: boolean;
+		action?: (banner: BannerAPI) => void;
+	};
+
+	export type BannerControls = {
+		accept?: BannerControlButton | null;
+		decline?: BannerControlButton | null;
+		moreInfo?:
+			| (Omit<BannerControlButton, 'framed'> & {
+					type?: 'link' | 'framed' | 'frameless';
+					href?: string;
+			  })
+			| null;
+		dismiss?: Omit<BannerControlButton, 'framed'> | null;
+		/** if true, accept and decline buttons are swapped with more info */
+		swap?: boolean | null;
+	};
+
+	const defaultBannerControls: BannerControls = {
+		accept: {
+			label: 'Accept',
+			framed: true,
+			action: (banner) => banner.close()
+		},
+		decline: {
+			label: 'Decline',
+			framed: false,
+			action: (banner) => banner.close()
+		},
+		dismiss: {
+			action: (banner) => banner.close()
+		},
+		swap: false
+	};
+</script>
+
+<script lang="ts">
+	import type { Snippet } from 'svelte';
+	import type { ClassValue } from 'svelte/elements';
+	import Link from './Link.svelte';
+	import Button from './Button.svelte';
+	import FramelessButton from './FramelessButton.svelte';
+	import { X } from 'phosphor-svelte';
+	import { mergeOverrideObject } from './util';
+
+	/**
+	 * Banner provides a simple component to display a banner message with
+	 * additional tooling for easy control integration. Controls tools are
+	 * geared toward cookie consent, announcements, and similar use cases.
+	 */
+
+	interface Props {
+		title?: string;
+		open?: boolean;
+		disabled?: boolean;
+		frozen?: boolean;
+		position?: 'top' | 'bottom';
+		controls?: BannerControls | null;
+		/** if true, frameless buttons and links are inverted (default: true) */
+		invertFrameless?: boolean;
+		class?: ClassValue | null;
+		onaccept?: (banner: BannerAPI) => void;
+		ondecline?: (banner: BannerAPI) => void;
+		children?: Snippet;
+	}
+
+	let {
+		title,
+		open = $bindable(false),
+		disabled = $bindable(false),
+		frozen = $bindable(false),
+		position,
+		controls: rawControls = defaultBannerControls,
+		invertFrameless = true,
+		class: classValue,
+		onaccept,
+		ondecline,
+		children
+	}: Props = $props();
+
+	const controls = $derived(mergeOverrideObject(defaultBannerControls, rawControls));
+
+	const api: BannerAPI = {
+		open: () => (open = true),
+		close: () => (open = false),
+		isOpen: () => open,
+		disable: () => (disabled = true),
+		enable: () => (disabled = false),
+		isDisabled: () => disabled,
+		freeze: () => (frozen = true),
+		unfreeze: () => (frozen = false),
+		isFrozen: () => frozen
+	};
+
+	const handleAccept = () => {
+		controls.accept?.action?.(api);
+		onaccept?.(api);
+	};
+	const handleDecline = () => {
+		controls.decline?.action?.(api);
+		ondecline?.(api);
+	};
+</script>
+
+{#if open}
+	<div
+		class={[
+			'fixed left-0 z-50 w-screen px-8 py-6',
+			position === 'top' ? 'top-0' : 'bottom-0',
+			'bg-sui-secondary-800 text-sui-background',
+			classValue
+		]}
+	>
+		{#if title || controls?.dismiss}
+			<div class="mb-2 flex items-center justify-between gap-4">
+				{#if title}
+					<h3 class="mb-2 text-lg font-semibold">{title}</h3>
+				{/if}
+
+				{#if controls?.dismiss}
+					<FramelessButton
+						inverted={invertFrameless}
+						onclick={() => controls.dismiss?.action?.(api)}
+						class="ml-auto"
+					>
+						{#if controls.dismiss?.label}
+							{controls.dismiss.label}
+						{/if}
+						<X class="mt-0.5" size="1.2rem" weight="bold" />
+					</FramelessButton>
+				{/if}
+			</div>
+		{/if}
+
+		{@render children?.()}
+
+		{#if controls !== null}
+			<div
+				class={['mt-4 flex flex-wrap justify-between gap-4', controls.swap && 'flex-row-reverse']}
+			>
+				<!-- More info button/link -->
+				{#if controls.moreInfo}
+					{#if controls.moreInfo.type === 'link' && controls.moreInfo.href}
+						<Link
+							href={controls.moreInfo.href}
+							class={controls.moreInfo.class}
+							inverted={invertFrameless}
+						>
+							{controls.moreInfo.label || 'More Info'}
+						</Link>
+					{:else if controls.moreInfo.type === 'framed'}
+						<Button
+							class={controls.moreInfo.class}
+							onclick={() => controls.moreInfo?.action?.(api)}
+						>
+							{controls.moreInfo.label || 'More Info'}
+						</Button>
+					{:else}
+						<FramelessButton
+							class={controls.moreInfo.class}
+							onclick={() => controls.moreInfo?.action?.(api)}
+							inverted={invertFrameless}
+						>
+							{controls.moreInfo.label || 'More Info'}
+						</FramelessButton>
+					{/if}
+				{/if}
+
+				<div
+					class={['flex justify-end gap-4', controls.swap ? 'mr-auto flex-row-reverse' : 'ml-auto']}
+				>
+					<!-- Decline button -->
+					{@render buttonControl(controls.decline, handleDecline, false)}
+					<!-- Accept button -->
+					{@render buttonControl(controls.accept, handleAccept, true)}
+				</div>
+			</div>
+		{/if}
+	</div>
+{/if}
+
+{#snippet buttonControl(
+	button: BannerControlButton | undefined | null,
+	handleClick: (banner: BannerAPI) => void,
+	framedDefault: boolean
+)}
+	{#if button}
+		{#if button.framed || framedDefault}
+			<Button class={button.class} onclick={() => handleClick(api)}>
+				{button.label || 'Button'}
+			</Button>
+		{:else}
+			<FramelessButton
+				class={button.class}
+				onclick={() => handleClick(api)}
+				inverted={invertFrameless}
+			>
+				{button.label || 'Button'}
+			</FramelessButton>
+		{/if}
+	{/if}
+{/snippet}

src/lib/Dialog.svelte

@@ -41,24 +41,29 @@
 		title: (title: string) => void;
 	}
 
+	type DialogControlButton = {
+		label?: string;
+		class?: ClassValue;
+		action?: (dialog: DialogAPI) => void;
+	};
+
 	/**
 	 * Configures the default dialog controls.
 	 */
-	export type DialogControlOpts = {
-		cancel?: {
-			label?: string;
-			class?: ClassValue;
-			action?: (dialog: DialogAPI) => void;
-		};
-		ok?: {
-			label?: string;
-			class?: ClassValue;
-			action?: (dialog: DialogAPI) => void;
-		};
-		close?: {
-			class?: ClassValue;
-			action?: (dialog: DialogAPI) => void;
-		};
+	export type DialogControls = {
+		cancel?: DialogControlButton | null;
+		ok?: DialogControlButton | null;
+		close?: Omit<DialogControlButton, 'label'> | null;
+	};
+
+	const defaultDialogControls: DialogControls = {
+		cancel: {
+			label: 'Cancel'
+		},
+		ok: {
+			label: 'OK'
+		},
+		close: {}
 	};
 </script>
 
@@ -72,6 +77,7 @@
 	import { X } from 'phosphor-svelte';
 	import { ErrorMessage, type RawError } from './error';
 	import ErrorBox from './ErrorBox.svelte';
+	import { mergeOverrideObject } from './util';
 
 	interface Props {
 		open?: boolean;
@@ -80,7 +86,7 @@
 		size?: 'sm' | 'md' | 'lg' | 'max';
 		class?: ClassValue;
 		children?: Snippet;
-		controls?: Snippet | DialogControlOpts;
+		controls?: Snippet | DialogControls;
 		onopen?: (dialog: DialogAPI) => void;
 		onclose?: (dialog: DialogAPI) => void;
 		loading?: boolean;
@@ -95,7 +101,7 @@
 		size = 'sm',
 		class: classValue,
 		children,
-		controls,
+		controls: rawControls = defaultDialogControls,
 		onopen,
 		onclose,
 		loading = $bindable(false),
@@ -103,6 +109,12 @@
 		disabled = $bindable(false)
 	}: Props = $props();
 
+	let controls = $derived(
+		typeof rawControls === 'function'
+			? rawControls
+			: mergeOverrideObject(defaultDialogControls, rawControls)
+	);
+
 	let dialogContainer = $state<HTMLDivElement | null>(null);
 	let error = $state<ErrorMessage | null>(null);
 
@@ -192,49 +204,62 @@
 
 			{#if children}{@render children()}{:else}Dialog is empty{/if}
 
+			<!-- Dialog Controls -->
 			<div class="mt-6 flex justify-end gap-4">
 				{#if controls && typeof controls === 'function'}{@render controls()}{:else}
-					<Button
-						class={controls?.cancel?.class}
-						onclick={() => {
-							if (controls?.cancel?.action) {
-								controls.cancel.action(dialogAPI);
-							} else if (!frozen) {
-								open = false;
-							}
-						}}
-						disabled={frozen}
-					>
-						{controls?.cancel?.label || 'Cancel'}
-					</Button>
-					<Button
-						class={controls?.ok?.class}
-						onclick={() => {
-							if (controls?.ok?.action) {
-								controls.ok.action(dialogAPI);
-							} else if (!frozen && !loading && !disabled) {
-								open = false;
-							}
-						}}
-						disabled={frozen || loading || disabled}
-						{loading}
-					>
-						{controls?.ok?.label || 'OK'}
-					</Button>
+					{#if controls.cancel !== null}
+						<Button
+							class={controls?.cancel?.class}
+							onclick={() => {
+								if (controls?.cancel?.action) {
+									controls.cancel.action(dialogAPI);
+								} else if (!frozen) {
+									open = false;
+								}
+							}}
+							disabled={frozen}
+						>
+							{controls?.cancel?.label || 'Cancel'}
+						</Button>
+					{/if}
+					{#if controls.ok !== null}
+						<Button
+							class={controls?.ok?.class}
+							onclick={() => {
+								if (controls?.ok?.action) {
+									controls.ok.action(dialogAPI);
+								} else if (!frozen && !loading && !disabled) {
+									open = false;
+								}
+							}}
+							disabled={frozen || loading || disabled}
+							{loading}
+						>
+							{controls?.ok?.label || 'OK'}
+						</Button>
+					{/if}
 				{/if}
 			</div>
-			<button
-				type="button"
-				aria-label="close"
-				class="absolute top-4 right-4 inline-flex cursor-pointer items-center
+
+			<!-- Close Button -->
+			{#if typeof controls === 'function' || controls?.close !== null}
+				<button
+					type="button"
+					aria-label="close"
+					class="absolute top-4 right-4 inline-flex cursor-pointer items-center
 				justify-center disabled:cursor-not-allowed disabled:opacity-50"
-				onclick={() => {
-					if (!frozen) open = false;
-				}}
-				disabled={frozen}
-			>
-				<X size="1.5em" weight="bold" />
-			</button>
+					onclick={() => {
+						if (typeof controls !== 'function' && controls?.close?.action) {
+							controls?.close?.action?.(dialogAPI);
+						} else if (!frozen) {
+							open = false;
+						}
+					}}
+					disabled={frozen}
+				>
+					<X size="1.5em" weight="bold" />
+				</button>
+			{/if}
 		</div>
 	</div>
 {/snippet}

src/lib/DurationInput.svelte

@@ -26,12 +26,7 @@
 	 * @returns The ISO 8601 duration string.
 	 */
 	export const durationToISO8601 = (duration: TimeDuration): string => {
-		let str = 'P';
-		if (duration.hours || duration.minutes || duration.seconds) str += 'T';
-		if (duration.hours) str += `${duration.hours}H`;
-		if (duration.minutes) str += `${duration.minutes}M`;
-		if (duration.seconds) str += `${duration.seconds}S`;
-		return str;
+		return serialize(duration);
 	};
 
 	/**
@@ -40,16 +35,7 @@
 	 * @returns The TimeDuration object.
 	 */
 	export const iso8601ToDuration = (str: string): TimeDuration => {
-		const regex = /^P(?:(\d+)D)?(?:T(?:(\d+)H)?(?:(\d+)M)?(?:(\d+)S)?)?$/;
-		const matches = str.match(regex);
-		if (!matches) {
-			throw new Error('Invalid ISO 8601 duration string');
-		}
-		return {
-			hours: matches[2] ? parseInt(matches[2], 10) : 0,
-			minutes: matches[3] ? parseInt(matches[3], 10) : 0,
-			seconds: matches[4] ? parseInt(matches[4], 10) : 0
-		};
+		return parse(str);
 	};
 </script>
 
@@ -62,6 +48,7 @@
 	import Label from './Label.svelte';
 	import { liveValidator, validate } from '@svelte-toolkit/validate';
 	import StyledRawInput from './StyledRawInput.svelte';
+	import { parse, serialize } from 'tinyduration';
 
 	interface Props {
 		/**

src/lib/FramelessButton.svelte

@@ -7,6 +7,7 @@
 		icon?: IconDef;
 		iconPosition?: 'left' | 'right';
 		disabled?: boolean;
+		inverted?: boolean;
 		class?: ClassValue | null | undefined;
 		children: Snippet;
 		onclick?: MouseEventHandler<HTMLButtonElement>;
@@ -16,6 +17,7 @@
 		icon,
 		iconPosition = 'right',
 		disabled = false,
+		inverted = false,
 		class: classValue,
 		children,
 		onclick
@@ -31,8 +33,11 @@
 <button
 	type="button"
 	class={[
-		'text-sui-accent hover:text-sui-primary inline-flex cursor-pointer items-center gap-1.5 transition-colors',
+		'inline-flex cursor-pointer items-center gap-1.5 transition-colors',
 		disabled && 'pointer-events-none cursor-not-allowed opacity-50',
+		inverted
+			? 'text-sui-background hover:text-sui-background/80 font-medium'
+			: 'text-sui-accent hover:text-sui-primary',
 		classValue
 	]}
 	{onclick}

src/lib/InputGroup.svelte

@@ -9,6 +9,6 @@
 	let { class: classList, children }: Props = $props();
 </script>
 
-<div class={['mt-4 flex min-w-80 items-center justify-start gap-2', classList]}>
+<div class={['mt-4 flex min-w-80 flex-wrap items-center justify-start gap-2', classList]}>
 	{@render children?.()}
 </div>

src/lib/Link.svelte

@@ -1,32 +1,46 @@
 <script lang="ts" module>
-	import { env } from '$env/dynamic/public';
+	/**
+	 * Rewrites the href based on a given basepath.
+	 * If the href is absolute, it is returned as is.
+	 * If the href is relative, the basepath is prepended.
+	 * @param href The original href.
+	 * @returns The rewritten href.
+	 */
+	export const rewriteHref = (href: string, basepath?: string | null): string => {
+		// If no base path is set, return the href as is
+		if (!basepath) return href;
 
-	const { PUBLIC_BASEPATH } = env;
-
-	const trim = (str: string, char: string, trimStart?: boolean, trimEnd?: boolean) => {
-		let start = 0,
-			end = str.length;
-
-		if (trimStart || trimStart === undefined) {
-			while (start < end && str[start] === char) start++;
+		// Use URL API to determine if href is relative or absolute
+		try {
+			// this will only succeed if href is absolute
+			const independentUrl = new URL(href);
+			return independentUrl.toString();
+		} catch {
+			// now we can assume that href is relative or entirely invalid
+			// test with a generic baseURI to see if it's valid relative
+			try {
+				const relativeUrl = new URL(href, 'http://example.com');
+				// if we reach here, it's a valid relative URL
+				const prefix = trimEdges(basepath, '/');
+				return `/${prefix}/${trimEdges(relativeUrl.pathname, '/', true, false)}`;
+			} catch {
+				throw new Error(`Attempted to rewrite invalid href: ${href}`);
+			}
 		}
-
-		if (trimEnd || trimEnd === undefined) {
-			while (end > start && str[end - 1] === char) end--;
-		}
-
-		return str.substring(start, end);
 	};
 </script>
 
 <script lang="ts">
 	import type { Snippet } from 'svelte';
 	import type { ClassValue, MouseEventHandler } from 'svelte/elements';
+	import { trimEdges } from './util';
 
 	interface Props {
 		href: string;
+		basepath?: string | null;
 		disabled?: boolean;
 		tab?: 'current' | 'new';
+		inverted?: boolean;
 		class?: ClassValue | null | undefined;
 		children: Snippet;
 		onclick?: MouseEventHandler<HTMLAnchorElement>;
@@ -34,26 +48,28 @@
 
 	let {
 		href,
+		basepath,
 		disabled = false,
 		tab = 'current',
+		inverted = false,
 		class: classValue,
 		children,
 		onclick
 	}: Props = $props();
 
-	if (PUBLIC_BASEPATH && !href.startsWith('http://') && !href.startsWith('https://')) {
-		let prefix = trim(PUBLIC_BASEPATH, '/');
-		href = `/${prefix}/${trim(href, '/', true, false)}`;
-	}
+	const computedHref = $derived(rewriteHref(href, basepath));
 </script>
 
 <a
 	class={[
-		'text-sui-accent hover:text-sui-primary inline-flex items-center gap-1.5 transition-colors',
+		'inline-flex items-center gap-1.5 transition-colors',
 		disabled && 'pointer-events-none cursor-not-allowed opacity-50',
+		inverted
+			? 'text-sui-background hover:text-sui-background/80 font-medium'
+			: 'text-sui-accent hover:text-sui-primary',
 		classValue
 	]}
-	{href}
+	href={computedHref}
 	target={tab === 'new' ? '_blank' : undefined}
 	rel={tab === 'new' ? 'noopener noreferrer' : undefined}
 	{onclick}

src/lib/index.ts

@@ -1,5 +1,6 @@
 // Reexport your entry components here
 export { default as ActionSelect, type ActionSelectOption } from './ActionSelect.svelte';
+export { default as Banner, type BannerControls, type BannerAPI } from './Banner.svelte';
 export { default as Button } from './Button.svelte';
 export { default as CenterBox } from './CenterBox.svelte';
 export { default as Checkbox, type CheckboxState } from './Checkbox.svelte';
@@ -18,7 +19,7 @@ export { default as InjectGoogleMaps } from './InjectGoogleMaps.svelte';
 export { default as InjectUmami } from './InjectUmami.svelte';
 export { default as InputGroup } from './InputGroup.svelte';
 export { default as Label } from './Label.svelte';
-export { default as Link } from './Link.svelte';
+export { default as Link, rewriteHref } from './Link.svelte';
 export { default as PhoneInput } from './PhoneInput.svelte';
 export { default as PinInput } from './PinInput.svelte';
 export { default as RadioGroup } from './RadioGroup.svelte';
@@ -47,7 +48,8 @@ export {
 	getValue,
 	targetMust,
 	capitalizeFirstLetter,
-	prefixZero
+	prefixZero,
+	trimEdges
 } from './util';
 export {
 	type ToolbarToggleState,

src/lib/util.ts

@@ -120,3 +120,78 @@ export const prefixZero = (str: string): string => {
 	}
 	return str;
 };
+
+/**
+ * Trims the specified character from the start and/or end of the string.
+ * @param str The string to trim.
+ * @param char The character to trim.
+ * @param trimStart Whether to trim from the start of the string. Default: true.
+ * @param trimEnd Whether to trim from the end of the string. Default: true.
+ * @returns The trimmed string.
+ */
+export const trimEdges = (str: string, char: string, trimStart?: boolean, trimEnd?: boolean) => {
+	let start = 0,
+		end = str.length;
+
+	if (trimStart || trimStart === undefined) {
+		while (start < end && str[start] === char) start++;
+	}
+
+	if (trimEnd || trimEnd === undefined) {
+		while (end > start && str[end - 1] === char) end--;
+	}
+
+	return str.substring(start, end);
+};
+
+// helper: only treat plain objects as mergeable
+const isPlainObject = (v: unknown): v is Record<string, unknown> =>
+	typeof v === 'object' &&
+	v !== null &&
+	!Array.isArray(v) &&
+	Object.getPrototypeOf(v) === Object.prototype;
+
+/** Merge two plain object maps. No `any` used. */
+function mergePlainObjects(
+	baseObj: Record<string, unknown>,
+	overrideObj: Record<string, unknown>
+): Record<string, unknown> {
+	const res: Record<string, unknown> = { ...baseObj };
+
+	for (const k of Object.keys(overrideObj)) {
+		const v = overrideObj[k];
+		if (v === undefined) continue; // undefined preserves base
+		const b = res[k];
+
+		if (isPlainObject(v) && isPlainObject(b)) {
+			res[k] = mergePlainObjects(b as Record<string, unknown>, v as Record<string, unknown>);
+		} else {
+			// primitives, null, arrays, non-plain objects replace base
+			res[k] = v;
+		}
+	}
+
+	return res;
+}
+
+/**
+ * Merge `base` with `override`.
+ * - `null` in `override` replaces (kept as valid override)
+ * - `undefined` in `override` is ignored (keeps base)
+ * - Only plain objects are deep-merged
+ * - If `override` is null/undefined we return a shallow copy of `base`
+ */
+export const mergeOverrideObject = <T extends Record<string, unknown>>(
+	base: T,
+	override?: Partial<T> | null
+): T => {
+	if (override == null) return { ...base } as T;
+
+	// Use plain maps internally to avoid explicit any
+	const baseMap = { ...base } as Record<string, unknown>;
+	const overrideMap = override as Record<string, unknown>;
+
+	const merged = mergePlainObjects(baseMap, overrideMap);
+
+	return merged as T;
+};

src/routes/+page.svelte

@@ -39,6 +39,7 @@
 	import ErrorBox from '$lib/ErrorBox.svelte';
 	import TextareaInput from '$lib/TextareaInput.svelte';
 	import DurationInput, { formatDuration } from '$lib/DurationInput.svelte';
+	import Banner from '$lib/Banner.svelte';
 
 	// Lazy-load heavy components
 	let PhoneInput = createLazyComponent(() => import('$lib/PhoneInput.svelte'));
@@ -56,7 +57,7 @@
 		{ value: 'option3', label: 'Option 3', disabled: true }
 	];
 	let lazyOptions: ComboboxOption[] = $state([]);
-	let dateInputValue = $state<CalendarDate | undefined>(undefined);
+	let dateInputValue = $state<CalendarDate | null>(null);
 	let checkboxValue = $state<CheckboxState>('indeterminate');
 	let dialogOpen = $state(false);
 	let scrollableDialogOpen = $state(false);
@@ -74,7 +75,25 @@
 	const boldStore = boldToggle.store;
 </script>
 
-<title>sui</title>
+<svelte:head>
+	<title>sui</title>
+</svelte:head>
+
+<!-- Cookie Consent Banner Demo -->
+<Banner
+	title="Manage Cookies"
+	controls={{
+		moreInfo: { label: 'More Info', type: 'link', href: '#!' },
+		dismiss: null,
+		swap: true
+	}}
+	onaccept={() => console.log('Cookies accepted!')}
+	ondecline={() => console.log('Cookies declined!')}
+	open
+>
+	We use cookies and similar technologies to enhance your experience, analyze site traffic, and
+	measure our ads. You can manage your preferences anytime.
+</Banner>
 
 <h1 class="mb-4 text-3xl font-bold">sui — Opinionated Svelte 5 UI toolkit</h1>
 
@@ -476,6 +495,23 @@
 	{/snippet}
 </div>
 
+<!-- Link with href rewriting -->
+<div class="component">
+	<p class="title">Link (with href rewriting)</p>
+
+	<p class="mb-3">
+		href rewriting allows you to prepend a basepath to relative links, making it easier to manage
+		URLs in your application. It is recommended to wrap this element with your own, e.g. AppLink,
+		that automatically provides the basepath from your app's configuration.
+	</p>
+
+	<div class="flex flex-col gap-3">
+		<Link href="/about" basepath="/sui-demo">Go to About Page (with basepath)</Link>
+		<Link href="https://svelte.dev" basepath="/sui-demo">External Svelte Site</Link>
+		<Link href="contact">Contact Us (relative link, no basepath)</Link>
+	</div>
+</div>
+
 <!-- Regular Dialog Demo -->
 <Dialog
 	bind:open={dialogOpen}
@@ -487,7 +523,8 @@
 				dialog.close();
 				alert('Dialog submitted!');
 			}
-		}
+		},
+		cancel: null
 	}}
 	onopen={(dialog) => {
 		dialog.error('Example error message!');