Skeleton

Static layout placeholders with a named loading status.

stable · light DOM · 4.0.0. Light DOM retains static content, native semantics, label relationships and host composition without duplicating controls.

Standalone example ↗Copy file manifest Canonical JSON Vue gallery ↗Prepare an agent kit →

Live variants

default

Loading project details…

Markup

<j3w1-skeleton id="example-skeleton-default"><div class="skeleton" aria-busy="true"><p role="status">Loading project details…</p><div class="skeleton-block" aria-hidden="true"></div><div class="skeleton-block skeleton-short" aria-hidden="true"></div></div></j3w1-skeleton>

Install and register

Use the exact version. If npm publication is pending, install the release tarball from the installation guide.

npm install --save-exact @j3w1/ui@4.0.0

import '@j3w1/ui/tokens.css';
import '@j3w1/ui/styles/skeleton.css';
import '@j3w1/ui/register/skeleton';

Insert the maintained markup above after loading these imports. Its native children provide accessible names and form behavior; the empty custom tag alone does not create a control.

Vue SFC, React, Astro and plain HTML integration →

Copy the complete implementation

npx --package=@j3w1/ui@4.0.0 j3w1-ui copy skeleton --out ./vendor/j3w1/skeleton

The CLI verifies every file before writing and refuses overwrites. Serve the output over HTTP and open index.html. Keep its modules, CSS, tokens and licence notices together.

Public API

attributes

Name	Type / signature	Meaning
`disabled`	`CustomEvent`	Disable the native controls owned by this instance.
`loading`	`CustomEvent`	Mark the primary control busy and prevent duplicate activation.

properties

Name	Type / signature	Meaning
`disabled`	`boolean`	Delegates disabled state to native children.
`name`	`string`	Native control name; application form keys remain explicit.

methods

Name	Type / signature	Meaning
`refresh`	`(): void`	Reconnect behavior after replacing native child structure.
`focus`	`(options?: FocusOptions): void`	Focus the first usable native control.

events

Name	Type / signature	Meaning

Dependencies and verification

Registered components: none. Style dependencies: none.

Package presence establishes an available implementation. Actual passes depend on the tested artifact and environment. Read specification execution evidence; read packed-consumer evidence; inspect the complete state matrix.

Full implementation manifest, API and token dependency closure

Canonical specification

Specimen density

Specimen profile

Skeleton `skeleton`

Family: Feedback and overlays
Maturity: stable
Priority: R2
Since: 1.0.0
Native control: Native status text with aria-hidden decorative blocks
specified
demonstrated

Static layout placeholders with a named loading status.

Report an issue with this component

Tokens

Focus a role to inspect its values; follow its link for persistent usage and source details.

Part	Role	Value	Use
`root.bg`	`color.surface.default`approveduse	`#0d0707`	D-041 surface.default: color.primitive.modern.panel.
`root.text`	`color.text.default`approveduse	`#e99499`	D-041 owner correction: rose is the default UI and reading foreground; near-white is reserved for document headings, highlights and contrast-critical fills.
`root.border`	`color.border.control`approveduse	`#c81a1a`	D-041 owner correction: red control and floating-frame borders, distinct from rose text.
`heading.text`	`color.text.bright`approveduse	`#ffa2a7`	D-041 owner correction: rose is the default UI and reading foreground; near-white is reserved for document headings, highlights and contrast-critical fills.
`secondary.text`	`color.text.muted`approveduse	`#d4868b`	D-041 owner correction: rose is the default UI and reading foreground; near-white is reserved for document headings, highlights and contrast-critical fills.
`control.bg`	`color.surface.input`approveduse	`#000000`	Form-control fill.
`control.focus`	`color.interaction.focus.ring`observeduse	`#e53935`	1px dashed focus ring on controls and rows.
`dependency.role-border-width-default`	`border.width.default`observeduse	`1px`	Every border is 1px.
`dependency.role-color-border-divider`	`color.border.divider`approveduse	`#482b2b`	D-041 border.divider: color.primitive.modern.divider.
`dependency.role-color-surface-raised`	`color.surface.raised`approveduse	`#140b0b`	D-041 surface.raised: color.primitive.modern.raised.
`dependency.role-focus-offset`	`focus.offset`observeduse	`-2px`	outline-offset for controls.
`dependency.role-radius-none`	`radius.none`observeduse	`0px`	The only radius. Nothing is rounded.
`dependency.role-space-12`	`space.12`observeduse	`12px`
`dependency.role-space-16`	`space.16`observeduse	`16px`

State matrix

Every declared state and combination, statically rendered; the default cell is live. Sizes: compact, comfortable (switch with the density control above).

State	Default
`default`	Loading project details…
`loading`
`reduced-motion`

Purpose

Reserves approximate layout space while a named region loads. Static; it never shimmers.

Anatomy

Parts as listed in the anatomy.

States

State	Visual	Non-colour channel
default	static decorative blocks	named loading status
loading	raised-surface blocks; no opacity fade	`aria-busy` on the region
reduced-motion	the same static presentation	no information depends on movement

Keyboard

Adds no tab stop and captures no focus.

Accessibility

aria-busy goes on the region being updated, with a concise status; blocks are aria-hidden. Never remove the focused control just to show a skeleton. Replacement content keeps a sensible reading order.

Portability

Follows the shared component defaults in spec/portability.md (section “Shared component defaults”).

Non-examples

Unlabelled controls. Colour-only status. Drag-only operations. Hidden required instructions. Stolen focus. An invented service success.

Contrast report

5 declared pairs measured on resolved sRGB values with the WCAG 2.x formula; 0 waived (decorative only), 0 failing. A pass is a design target for the named role, not an application-wide conformance claim.

Pair	State	Kind	Foreground	Background	Ratio	Min	Result
skeleton default text	default	text	`color.text.default` `#e99499`	`color.surface.default` `#0d0707`	8.72	4.5	pass
skeleton default border	default	ui	`color.border.control` `#c81a1a`	`color.surface.default` `#0d0707`	3.44	3	pass
Primary content	—	text	`color.text.default` `#e99499`	`color.surface.default` `#0d0707`	8.72	4.5	pass
Supporting content	—	text	`color.text.muted` `#d4868b`	`color.surface.default` `#0d0707`	7.22	4.5	pass
Control boundary	—	ui	`color.border.control` `#c81a1a`	`color.surface.default` `#0d0707`	3.44	3	pass

Keys

Key	Action
`Tab`	No new tab stops or focus capture.

For agents

Component JSON ·Implementation brief ·Build a task kit ·

Stress fixtures: FX-320 FX-360 FX-ZOOM-200 FX-I18N FX-RTL FX-RM FX-HC FX-TOUCH FX-DENSITY FX-STATE-MATRIX

j3w1 / theme

j3w1 / command

Skeleton

Live variants

default

Install and register

Copy the complete implementation

Public API

attributes

properties

methods

events

Dependencies and verification

Canonical specification

Skeleton `skeleton`

Tokens

State matrix

Purpose

Anatomy

States

Keyboard

Accessibility

Portability

Non-examples

Contrast report

Keys

For agents

Live variants

default

Install and register

Copy the complete implementation

Public API

attributes

properties

methods

events

Dependencies and verification

Canonical specification

Skeleton skeleton

Tokens

State matrix

Purpose

Anatomy

States

Keyboard

Accessibility

Portability

Non-examples

Contrast report

Keys

For agents

Skeleton `skeleton`