| name | andersseen-web-components |
| description | Use ready-made, styled Andersseen UI custom elements (@andersseen/web-components). Load when placing or wiring and-* elements — and-button, and-card, and-modal, and-tabs, and-drawer, and-dropdown, and-select, and-input, and-navbar, and-sidebar, and-toast, and-tooltip, and-accordion, and-alert, and-badge, and-breadcrumb, and-carousel, and-pagination — in plain HTML, Angular, React, Vue, or Astro. Trigger phrases: and-* component, andersseen web component, stencil custom element, shadow dom UI, design tokens. |
@andersseen/web-components — styled UI custom elements
Stencil custom-elements package. All tags share the and-* prefix and render in
Shadow DOM — never depend on internal shadow markup or classes. Built on top
of @andersseen/headless-core and @andersseen/icon. Framework-agnostic: works
in plain HTML, Angular, React, Vue, Astro.
Install
npm i @andersseen/web-components @andersseen/icon
Setup (bundled app)
import '@andersseen/web-components/components/all';
import { registerIcons, COMPONENT_ICONS } from '@andersseen/icon';
registerIcons(COMPONENT_ICONS);
import { enableAnimations } from '@andersseen/web-components';
enableAnimations();
Import the precompiled component stylesheet once in the application stylesheet.
It already contains the host utilities, so never add a Tailwind @source rule
for this package:
@import '@andersseen/web-components/style.css';
Tailwind is optional here, not required — style.css is tokens + host
utilities + a Tailwind Preflight reset bundled together for zero-setup use. Two
narrower imports exist for when that reset fights the host app's own CSS:
@import '@andersseen/web-components/tokens.css';
@import '@andersseen/web-components/elements.css';
If the host app already uses Tailwind, add the shareable preset instead of
hand-copying colors/radius into its config — it maps bg-primary, rounded-lg,
t-gap-* etc. to this package's own --* tokens:
module.exports = {
presets: [require('@andersseen/web-components/tailwind-preset')],
};
Optionally import one color theme after it to make that palette the default:
@import '@andersseen/web-components/colors/violet-cyan.css';
Available color imports:
@import '@andersseen/web-components/colors/indigo-rose.css';
@import '@andersseen/web-components/colors/slate-amber.css';
@import '@andersseen/web-components/colors/emerald-orange.css';
@import '@andersseen/web-components/colors/violet-cyan.css';
@import '@andersseen/web-components/colors/rose-teal.css';
The base stylesheet also contains all palettes for runtime switching. Set the
namespaced and-color attribute on an ancestor, normally <html>, without
loading another file:
<html and-color="emerald-orange" class="dark"></html>
Color and visual style are separate axes. Use and-color for the palette and
and-theme for shape and density:
<html and-color="emerald-orange" and-theme="compact" class="dark"></html>
Design tokens
All tokens use HSL and are applied via CSS variables on :root. Dark mode: add
class dark (or and-mode="dark") to <html> or any ancestor. and-theme
selects a visual style such as compact, playful, retro, or elegant; it
is not the color or dark-mode API. Legacy data-color, data-theme, and
data-mode attributes are compatibility-only and should not be used in new
code.
Key semantic tokens:
--primary / --primary-foreground --secondary / --secondary-foreground
--background / --foreground --card / --card-foreground
--muted / --muted-foreground --accent / --accent-foreground
--destructive / --destructive-foreground
--border / --input / --ring
--success / --warning / --info (each with a -foreground pair)
--radius drives every rounded corner (rounded-lg = var(--radius),
rounded-md/rounded-sm scale proportionally from it). and-theme also sets
per-component --theme-navbar-*/--theme-sidebar-*/--theme-carousel-*
dimensions, motion timings, and focus-ring sizing — not just radius/spacing — so
switching it has a real structural effect, not just a cosmetic one. Custom
themes: layer overrides on an existing preset via
[and-theme='brand'] { --primary: ...; --radius: ...; } rather than forking a
new theme file.
Prefer hsl(var(--token)) over hardcoded colors when extending styles.
Component contracts
and-button
Props : variant (default|destructive|outline|secondary|ghost|link)
size (default|sm|lg|icon) type (button|submit|reset)
disabled loading href target rel customClass
Events : andButtonClick → MouseEvent
Slots : [start] label text [end]
<and-button variant="default">Save</and-button>
<and-button variant="outline" size="sm" loading>
<and-icon slot="start" name="sparkles" size="16"></and-icon>
Generate
</and-button>
and-card
Props : variant (default|destructive|elevated|outline|ghost) padded customClass
Sub-components: and-card-header · and-card-title · and-card-description
and-card-content · and-card-footer
<and-card variant="elevated" padded>
<and-card-header>
<and-card-title>Title</and-card-title>
<and-card-description>Subtitle</and-card-description>
</and-card-header>
<and-card-content>Body content</and-card-content>
<and-card-footer>Footer</and-card-footer>
</and-card>
and-accordion
Props : allowMultiple (bool) defaultValue (string[]) orientation disabled
Sub-components: and-accordion-item (value, disabled)
and-accordion-trigger (default slot → label)
and-accordion-content (default slot → body)
<and-accordion allow-multiple>
<and-accordion-item value="q1">
<and-accordion-trigger>Question 1</and-accordion-trigger>
<and-accordion-content>Answer 1</and-accordion-content>
</and-accordion-item>
</and-accordion>
and-alert
Props : variant (default|destructive|success|warning|info) dismissible
Events : andDismiss → void
Slots : [icon] body text
<and-alert variant="success" dismissible>
<and-icon slot="icon" name="check-circle" size="16"></and-icon>
Profile saved successfully.
</and-alert>
and-badge
Props : variant (default|secondary|destructive|outline) customClass
<and-badge variant="secondary">Beta</and-badge>
and-breadcrumb + and-breadcrumb-item
Props (container) : size (sm|md|lg) navLabel customClass
Props (item) : href current (bool) size hideSeparator customClass
Events (item) : andBreadcrumbNavigate → string (href)
<and-breadcrumb>
<and-breadcrumb-item href="/">Home</and-breadcrumb-item>
<and-breadcrumb-item href="/products">Products</and-breadcrumb-item>
<and-breadcrumb-item current>Laptop</and-breadcrumb-item>
</and-breadcrumb>
and-carousel + and-carousel-item
Props (container) : autoplay (bool) interval (ms) label (ARIA)
Events : andSlideChange → number (0-based index)
Props (item) : label (ARIA slide label)
Keyboard : ArrowLeft / ArrowRight
<and-carousel autoplay interval="5000">
<and-carousel-item label="Slide 1"
><img src="..." alt=""
/></and-carousel-item>
<and-carousel-item label="Slide 2"
><img src="..." alt=""
/></and-carousel-item>
</and-carousel>
and-context-menu
Props : open (mutable bool) customClass
Events : andContextMenuOpenChange → boolean
Slots : [trigger] (right-click target) default (menu items)
<and-context-menu>
<div slot="trigger">Right-click me</div>
<and-menu-item value="copy">Copy</and-menu-item>
<and-menu-item value="delete" intent="destructive">Delete</and-menu-item>
</and-context-menu>
and-drawer
Props : open (mutable bool) placement (left|right|top|bottom) showClose (bool)
Events : andDrawerOpen · andDrawerClose
Slots : [header] [close-icon] default (body) [footer]
<and-drawer id="nav" placement="right">
<span slot="header">Settings</span>
<p>Drawer body content</p>
</and-drawer>
<and-button onclick="document.getElementById('nav').open = true"
>Open</and-button
>
and-dropdown
Props : items (DropdownItem[]) variant label placement (top|bottom|left|right) closeOnSelect
DropdownItem: { text: string; value: string; disabled?: boolean }
Events : andDropdownSelect → string (value) andDropdownOpenChange → boolean
Slots : [trigger] (custom trigger element)
<and-dropdown id="theme" label="Theme"></and-dropdown>
const dd = document.querySelector('#theme');
dd.items = [
{ text: 'Light', value: 'light' },
{ text: 'Dark', value: 'dark' },
];
dd.addEventListener('andDropdownSelect', e => {
document.documentElement.className = e.detail;
});
and-icon
Props : name (IconName — must be registered) size (default 24) color (default currentColor) strokeWidth (default 2)
<and-icon name="home" size="20"></and-icon>
and-input
Renders in light DOM (not Shadow DOM) — the real <input> is a descendant
of any wrapping <form>, so FormData, native validation, and autofill work
with no extra wiring. Set name for it to show up in FormData.
Props : value (mutable string) type name placeholder disabled required hasError label describedBy customClass
Events : andInputChange → string (current value) andInputBlur → void
<and-input
id="email"
name="email"
type="email"
placeholder="you@example.com"
required
></and-input>
and-select
Custom role="combobox" select — styleable unlike a native <select>, full
keyboard support (arrow keys, Home/End, typeahead). Also renders in light DOM:
set name and its hidden mirror input shows up in FormData.
Props : options (array or JSON string of {text,value,disabled?}) value (mutable string) name placeholder
disabled required hasError menuPlacement (auto|top|bottom) label describedBy customClass
Events : andSelectChange → string (selected value) andSelectBlur → void
<and-select name="country" placeholder="Choose a country"></and-select>
document.querySelector('and-select').options = [{ text: 'Spain', value: 'es' }];
and-control
Generic form-field wrapper for anything and-input/and-select don't cover — it
renders no control of its own. Slot in a native <textarea>, native <select>,
a third-party widget, or and-input/and-select, and it wires the label's
for/id and the message's aria-describedby to the first slotted element
automatically.
Props : label hint error (shown instead of hint, sets aria-invalid on the control) required (visual only)
<and-control label="Bio" hint="Max 200 characters">
<textarea name="bio" maxlength="200"></textarea>
</and-control>
and-code
Read-only command/code snippet block with a copy-to-clipboard button. Plain text
only — no syntax highlighting; prompt is just a display hint. Prompt is hidden
unless show-prompt is set.
Props : value prompt (default `$`) showPrompt (default false) copyable (default true) height customClass
Events : andCodeCopy → { value: string; success: boolean }
<and-code show-prompt="true" prompt="$" value="pnpm install"></and-code>
and-menu-list + and-menu-item
Props (list) : menuLabel customClass
Props (item) : intent (default|destructive) disabled value customClass
Events (item): andMenuItemSelect → string (value)
<and-menu-list>
<and-menu-item value="edit">Edit</and-menu-item>
<and-menu-item value="delete" intent="destructive">Delete</and-menu-item>
</and-menu-list>
and-modal
Props : open (mutable bool)
Events : andClose → void (backdrop, X button, or Escape)
Slots : default (body — close button auto-rendered top-right)
<and-modal id="confirm">
<h2>Are you sure?</h2>
<and-button onclick="document.getElementById('confirm').open = false"
>Cancel</and-button
>
</and-modal>
<and-button onclick="document.getElementById('confirm').open = true"
>Open</and-button
>
and-navbar
Props : items (NavItem[] | JSON string) activeItem (mutable)
variant (default|filled|floating|glass) position (static|sticky|fixed)
itemVariant (default|underline|filled) scrollSpy scrollSpyOffset
mobileBreakpoint minimalBreakpoint compactBreakpoint
NavItem : { id, label, icon?, href?, target?, disabled? }
Events : navItemClick → string navLinkClick → { id, href }
mobileMenuChange → boolean responsiveStageChange → stage
Slots : [start/brand] [main/nav] [end/actions] [toggle-icon] [mobile-title] [mobile-nav] [mobile-actions]
Responsive stages (auto): full → compact → minimal → mobile
const nav = document.getElementById('main-nav');
nav.items = [
{ id: 'home', label: 'Home', href: '#home' },
{ id: 'docs', label: 'Docs', href: '#docs' },
];
nav.addEventListener('navItemClick', e => (nav.activeItem = e.detail));
and-pagination
Props : totalPages (number) currentPage (mutable number)
Events : andPageChange → number (1-based page)
<and-pagination id="pager" total-pages="10" current-page="1"></and-pagination>
and-sidebar
Props : items (SidebarItem[] | JSON string) activeItem (mutable) collapsed (mutable bool)
variant (default|filled|floating|glass) itemVariant (default|underline|filled)
mobileCollapse mobileBreakpoint expandedWidth ('16rem') collapsedWidth ('4rem')
SidebarItem: { id, label, icon?, disabled?, section?: 'main'|'bottom' }
Events : andSidebarItemClick → string andSidebarToggle → boolean (collapsed)
Slots : [header] [top] [nav] [footer]
CSS vars : --sidebar-expanded-width, --sidebar-collapsed-width
const sidebar = document.getElementById('sidebar');
sidebar.items = [
{ id: 'home', label: 'Home', icon: 'home' },
{ id: 'settings', label: 'Settings', icon: 'settings', section: 'bottom' },
];
sidebar.addEventListener(
'andSidebarItemClick',
e => (sidebar.activeItem = e.detail),
);
and-tabs
Props : value (mutable — controlled) defaultValue (uncontrolled)
orientation (horizontal|vertical) activationMode (automatic|manual)
Events : andTabChange → string (selected value)
Sub-components: and-tabs-list → and-tabs-trigger (value, disabled) and-tabs-content (value)
<and-tabs default-value="overview">
<and-tabs-list>
<and-tabs-trigger value="overview">Overview</and-tabs-trigger>
<and-tabs-trigger value="settings">Settings</and-tabs-trigger>
</and-tabs-list>
<and-tabs-content value="overview">Overview panel content</and-tabs-content>
<and-tabs-content value="settings">Settings panel content</and-tabs-content>
</and-tabs>
and-toast
Programmatic only (no props / slots).
Method : present(message, type?, duration?) → Promise<number>
type: 'default'|'destructive'|'success'|'error'|'info'|'warning'
duration: ms (default 3000)
<and-toast id="toaster"></and-toast>
const toaster = document.getElementById('toaster');
await toaster.present('Profile saved', 'success');
await toaster.present('Connection failed', 'error', 5000);
and-tooltip
Props : content (string) placement (top|bottom|left|right) openDelay (ms) closeDelay (ms)
Slots : default (trigger element) [content] (when no content prop)
<and-tooltip content="Copy to clipboard" placement="top">
<and-button size="icon"
><and-icon name="copy" size="16"></and-icon
></and-button>
</and-tooltip>
Rules
- Use public props, slots, and CustomEvent APIs only. Never target internal
shadow parts.
- Prefer CSS token variables (e.g.
hsl(var(--primary))) over hex/rgb values.
- Icon
name must match a registered key; always pair with
registerIcons/registerAllIcons (see the andersseen-icon skill).
- For array-type props (
items, defaultValue) set them via JS, not attribute
strings, when possible.
- Mutable props marked above can be set directly as element properties.
