Foundation · stable · v1.0.0 · owner: Site system lead · contract 19 of 20 points (open: figma)
Reference
Source reference; not an executed check.
has-aside- variant
has-figure- variant
has-frag- variant
has-live- variant
has-toc- variant
is-active- state
is-add- state
is-after- state
is-agenda- state
is-away- state
is-bare- state
is-broken- state
is-compact- state
is-current- state
is-default- state
is-del- state
is-done- state
is-draft- state
is-empty- state
is-end- state
is-error- state
is-exception- state
is-extendable- state
is-fail- state
is-five- state
is-found- state
is-idle- state
is-in- state
is-info- state
is-ink- state
is-live- state
is-locked- state
is-long- state
is-loom- state
is-loop- state
is-loose- state
is-low- state
is-m- state
is-marked- state
is-me- state
is-medium- state
is-merged- state
is-mid- state
is-model- state
is-moving- state
is-na- state
is-next- state
is-notice- state
is-now- state
is-ok- state
is-on- state
is-out- state
is-overridable- state
is-own- state
is-pass- state
is-path- state
is-pending- state
is-pile- state
is-placeholder- state
is-plain- state
is-playing- state
is-pr- state
is-ready- state
is-root- state
is-running- state
is-s- state
is-same- state
is-seven- state
is-source- state
is-start- state
is-task- state
is-team- state
is-typing- state
is-wait- state
is-with- state
is-without- state
is-woven- state
Do and don't
2 positive / 2 negative authored documentation examples (2 each required); 1 reference (1 required); 0 failed. References and failures do not count; this is not behavior acceptance.
Do: Current navigation keeps native semantics
Authored by state-modifiers.tsRendered consumer example; not an executed correctness check. breadcrumbs Isolated document follows the browser's colour and contrast preferences. The outer theme toolbar does not control this document.
Open example: State modifiers · Do: Current navigation keeps native semantics Use the full-page example to follow page links.
Do: A state mark also has its word
Authored by state-modifiers.tsRendered consumer example; not an executed correctness check. band-word Isolated document follows the browser's colour and contrast preferences. The outer theme toolbar does not control this document.
Open example: State modifiers · Do: A state mark also has its word Use the full-page example to follow page links.
Don't: A modifier styles an unrelated element
Authored by state-modifiers.tsRule illustration; not an executed check. state-modifiers / modifiers.qualify
.is-broken { color: var(--madder-ink); }
No owning component class qualifies this standalone selector.Don't: A current class replaces current-page semantics
Authored by state-modifiers.tsRule illustration; not an executed check. breadcrumbs / crumbs.current-not-link
<a class="is-current" href="/product/operations/">Operations</a>
The already-current destination remains a link; no native current-page item is supplied.Rules
| Rule | Why | Check |
|---|---|---|
| Modifiers appear only compounded with an element's class. | Scope: a modifier changes its element and nothing else. | Automated: scripts/site/system/check.ts (modifier ownership) |
API
No props.
Contract details
The full contract: identity, anatomy, variants, states, tokens, layout, motion, accessibility, content, tests
Identity
| Aspect | Value |
|---|---|
| Id | state-modifiers |
| Layer | Foundations |
| Category | foundation |
| Owner | Site system lead |
| Status | stable |
| Version | 1.0.0 |
| Source | apps/showcase/site/system/foundations/state-modifiers.ts (private repository; the contract and the render function are this one module) |
| Version | Date | Change |
|---|---|---|
| 1.0.0 | 2026-10-26 | State modifiers as one module: its markup moved out of the page builder (scripts/site) into the system. |
Use when
- A state or a structural variant of an element. Why: One naming pattern makes states searchable and scriptable.
Do not use when
- As a standalone style. Why: A modifier without its element would style things it does not know.
Anatomy
| Part | What it is |
|---|---|
| is | is-*: a state (is-current, is-done, is-broken) |
| has | has-*: a structural variant (has-toc, has-live) |
Made of: nothing (a base element).
Used in: pages directly.
Variants
| Variant | When | Why |
|---|---|---|
| light and dark | Every page, following the reader's setting. | The same roles resolve to light or dark values, so no element chooses its own. |
States
| State | Rendered or not applicable |
|---|---|
| default | The specimen. |
| hover | Not applicable: A foundation is not interactive. |
| focus-visible | Not applicable: Not focusable. |
| active | Not applicable: Not interactive. |
| disabled | Not applicable: Nothing to disable. |
| loading | Not applicable: Values are built into the stylesheet. |
| empty | Not applicable: The build fails if a value is missing. |
| error | Not applicable: Unresolved values fail the brand gate, not the reader. |
| current | Not applicable: No current item. |
| visited | Not applicable: Not a link. |
| expanded | Not applicable: Does not open. |
Tokens
| Part | Token |
|---|---|
| state.marks | Small dye marks with their word (D-SITE-004) |
Layout
| Aspect | Value |
|---|---|
| breakpoints | Required review at 390, 768, 1024 and 1440 px; execution is not implied by this declaration; columns stack under 768 px; the wrap keeps a 16 px gutter on phones. |
| wrapping | Text wraps; nothing scrolls sideways. |
| textExpansion | Japanese runs 20 to 40% longer; headings break between phrases (jaBreaks) and blocks grow downwards. |
Spacing and rhythm
| Aspect | Value |
|---|---|
| internal | Not applicable: a foundation has no box of its own. |
| external | Not applicable. |
| rhythm | Applies to every element that reads it. |
Motion
| Aspect | Value |
|---|---|
| None | A foundation does not move. |
Runtime and reuse
Render-only element; mount any registered child enhancements separately. Preserve required Site CSS, fonts, responsive and locale rules from nativeElement.
Accessibility passport
| Aspect | Value |
|---|---|
| role | Not rendered on the site; its specimen in the Library is a list |
| name | The foundation's name |
| keyboard | Not interactive. |
| focus | Not focusable. |
| screenReader | The specimen is a plain list of names and values. |
| contrast | Every text and ground pair in the palette is checked (check-brand). |
| target | Not a target. |
Content
| Slot | Length | Voice |
|---|---|---|
| visible state words and programmatic state (consumer-owned) | The owning element's state-label budget | Use the meaningful word and native semantics as well as the modifier. .is-current cannot replace aria-current on navigation, and a dyed class cannot replace a health word. |
| modifier names and kind (fixed Library specimen) | The complete discovered modifier; kind is state or variant | Keep is-* and has-* as code identifiers. Discovery records CSS vocabulary and hooks, not a universal state API or a promise that every modifier works on every element. |
Good: “The current breadcrumb's page name with aria-current=page (Breadcrumbs)” · “Holding together beside its mark (BandWord); the class does not supply the word”
Bad: “is-current displayed as the reader's page name” · “A standalone .is-broken class used as the entire error message”
Japanese: Translate the owning element's visible and accessible state wording through its existing catalogue; never translate CSS modifier identifiers. Keep the same semantic current/pressed state in Japanese. Enumerating modifiers does not verify Japanese state announcements or complete native review.
Icons and illustrations
None: this element uses no icon or illustration of its own.
Decisions and exceptions
Usage
524 owned-class occurrences in built pages plus metadata-token references in built CSS (measured by npm run site:system).
No application mechanism is declared.
Current check result: not assessed by this report. Declarations and source-file presence do not establish executed enforcement or accepted coverage.
Tests
| Aspect | Value |
|---|---|
| unit | tests/unit/site-system.test.ts: renders every do and don't example through the registry and checks the classes it owns |
| visual | Not yet: there are no screenshot baselines; the Library page is checked for sideways scroll at 1440 px by tests/site/system.spec.ts |
| a11y | tests/site/system.spec.ts: axe (0 serious or critical) on the element's Library page in light and dark |
| parity | scripts/site/system/check.ts: Library examples are rendered by the same render function the site imports |
Figma
not-yet: The Loom Site Figma library is the last stage of the plan; this element is not mapped yet.