DuskMoon Elements

43 custom element packages built on @duskmoon-dev/el-base. Each element is a standard Web Component with Shadow DOM.

Installation

# Individual element
bun add @duskmoon-dev/el-button

# All elements at once
bun add @duskmoon-dev/elements

Registration

// Option 1: Explicit (tree-shakable)
import { register } from '@duskmoon-dev/el-button';
register();

// Option 2: Side-effect auto-register
import '@duskmoon-dev/el-button/register';

// Option 3: Register all elements
import { registerAll } from '@duskmoon-dev/elements';
registerAll();

Usage in HTML

<el-dm-button variant="filled" color="primary" size="md">
  Click me
</el-dm-button>

<el-dm-dialog id="my-dialog">
  <span slot="header">Title</span>
  Dialog content here.
  <div slot="footer">
    <el-dm-button onclick="this.closest('el-dm-dialog').hide()">Close</el-dm-button>
  </div>
</el-dm-dialog>

Properties & Attributes

Set via HTML attributes (kebab-case) or JS properties (camelCase). Properties with reflect: true sync both directions.

<!-- HTML attributes -->
<el-dm-button variant="outlined" disabled>Save</el-dm-button>

<!-- JS properties -->
<script>
  const btn = document.querySelector('el-dm-button');
  btn.variant = 'outlined';
  btn.disabled = true;
</script>

Common properties across elements:

Property	Type	Description
variant	String	Visual variant (filled, outlined, soft, text, ghost)
color	String	Color theme (primary, secondary, success, warning, error, info)
size	String	Size (sm, md, lg)
disabled	Boolean	Disable interaction

Complex data (arrays, objects) must be set via JS — use attribute: false:

const table = document.querySelector('el-dm-table');
table.columns = [{ field: 'name', header: 'Name' }];
table.data = [{ name: 'Alice' }, { name: 'Bob' }];

Events

Listen with addEventListener. Events bubble and are composed (cross shadow DOM).

const table = document.querySelector('el-dm-table');
table.addEventListener('sort', (e) => {
  console.log(e.detail); // { column: 'name', direction: 'asc' }
});
table.addEventListener('row-click', (e) => {
  console.log(e.detail); // { row: {...}, rowIndex: 0 }
});

Common events:

Element	Event	Detail
dialog	open, close	—
table	sort	{ column, direction }
table	select	{ selectedIds, selectedRows }
table	page-change	{ page, pageSize }
pagination	page-change	{ page }
tabs	tab-change	{ index, tab }
input	dm-input, dm-change	{ value }

Slots

Named slots project light DOM content into the element's shadow DOM.

<el-dm-button>
  <span slot="prefix">🔍</span>
  Search
  <span slot="suffix">→</span>
</el-dm-button>

<el-dm-card>
  <span slot="header">Card Title</span>
  Card body content
  <div slot="footer">Footer</div>
</el-dm-card>

Common slots: (default), header, footer, prefix, suffix, empty, actions.

CSS Parts

Style shadow DOM internals from outside using ::part():

el-dm-button::part(button) {
  border-radius: 0;
}
el-dm-dialog::part(backdrop) {
  backdrop-filter: blur(4px);
}
el-dm-table::part(thead) {
  background: var(--color-surface-container-high);
}

Theming

Elements use CSS custom properties from @duskmoon-dev/el-base. Apply a preset theme:

import { applyTheme } from '@duskmoon-dev/el-base';

applyTheme(document.documentElement, 'moonlight'); // dark
applyTheme(document.documentElement, 'sunshine');   // light
// Also: 'ocean', 'forest', 'rose'

Override individual variables:

:root {
  --color-primary: oklch(60% 0.15 250);
  --color-surface: #ffffff;
}

Key variables: --color-primary, --color-surface, --color-on-surface, --color-outline, --color-surface-container.

See references/core-api.md for full CSS variable list.

Batched Rendering

Property changes are batched via queueMicrotask. Multiple changes in the same tick produce a single re-render:

const el = document.querySelector('el-dm-button');
el.variant = 'outlined';
el.color = 'error';
el.size = 'lg';
// → single re-render

References

• Element catalog — all 43 packages by category with class names
• Core API — BaseElement API, mixins, style utilities, CSS variables, themes, validation

For CSS art elements (<el-dm-art-*>), see the duskmoon-art-elements skill.