Accessibility

Pyreon is built so that accessible UI is the default, not an afterthought. Most of the work — label/error wiring, focus management, keyboard navigation, correct ARIA serialization — happens automatically when you use the framework's primitives. Where it can't be automatic, it's a one-line opt-in.

This page is the map: what you get for free, and how to reach for the rest.

What you get out of the box

Forms — automatic label, error, and description wiring

@pyreon/form's useField / <Form> generate the ARIA relationships every accessible form needs — you don't hand-wire id / for / aria-describedby / aria-invalid:

import { Form, useField } from '@pyreon/form'

function EmailField() {
  // register() returns a stable id + reactive aria-invalid / aria-describedby
  const { inputProps, labelProps, errorProps, showError } = useField('email')
  return (
    <div>
      <label {...labelProps}>Email</label>
      <input {...inputProps} />
      {() => showError() && <span {...errorProps()}>Enter a valid email</span>}
    </div>
  )
}

The label is associated with the input, the error is linked via aria-describedby, and aria-invalid flips reactively — all from useField('email').

Screen-reader announcements

announce() — status & errors, zero setup

announce(message) speaks to screen-reader users through an aria-live region that's created lazily on first call. No provider, no component to mount, SSR-safe (a no-op on the server):

import { announce } from '@pyreon/a11y'

announce('Settings saved')                          // polite (default)
announce('Connection lost', { politeness: 'assertive' }) // interrupts
announce('Copied to clipboard', { clearAfter: 1000 })

Use it for things sighted users perceive visually but assistive-tech users need spoken: a saved toast, a validation error, a "5 results" count.

<RouteAnnouncer> — single-page navigations

Client-side navigations change the URL and DOM but fire no page-load event, so screen readers never announce the new page. Drop one <RouteAnnouncer> near your router root to close that gap:

import { RouteAnnouncer } from '@pyreon/a11y/router'

<RouterProvider router={router}>
  <RouteAnnouncer />
  <RouterView />
</RouterProvider>

It announces each route's meta.title (or "Navigated to <path>") to a polite live region. Customise with format, or use the useRouteAnnouncer() hook form. The router dependency lives only in the @pyreon/a11y/router subpath, so importing just announce / VisuallyHidden from the main entry stays router-free.

<LiveRegion> — declarative status

announce() is fire-and-forget; <LiveRegion> is the declarative complement for status that lives somewhere specific in your layout — a form's validation summary, a "Saving…" → "Saved" indicator, an async result count. Place it once and drive its children with a signal; the browser announces every change automatically — no announce() call, no effect:

import { LiveRegion } from '@pyreon/a11y'

<LiveRegion>{() => status()}</LiveRegion>                    // polite (default → role="status")
<LiveRegion politeness="assertive">{() => error()}</LiveRegion> // interrupts (→ role="alert")
<LiveRegion visible>{() => saveState()}</LiveRegion>         // also shown on screen

Screen-reader-only by default (it reuses VisuallyHidden's clipping), visible opts into on-screen text, and politeness="off" silences it without unmounting. It renders on the server too, so the region exists at hydration and the very first reactive update is announced. Read it inside the accessor ({() => status()}) so the region tracks the signal.

Visually-hidden content & stable IDs

import { VisuallyHidden, createA11yId } from '@pyreon/a11y'

// Off-screen but in the accessibility tree (unlike display:none):
<button><SearchIcon /><VisuallyHidden>Search</VisuallyHidden></button>

// Stable, SSR-safe ids for ARIA relationships (no hydration mismatch):
const hintId = createA11yId('hint')
<input aria-describedby={hintId} />
<span id={hintId}>Must be at least 8 characters</span>

Skip to content (WCAG 2.4.1)

Render <SkipLink> as the first focusable element on the page. It's clipped out of view until a keyboard user presses Tab, then appears at the top-left; activating it moves both scroll and keyboard focus to your main landmark, so the next Tab continues from the content — past the repeated nav.

import { SkipLink } from '@pyreon/a11y'

<body>
  <SkipLink href="#main">Skip to content</SkipLink>
  <nav>…</nav>
  <main id="main">…</main>
</body>

It adds a programmatic-focus tabindex to the target automatically when it isn't natively focusable, so a plain <main id="main"> just works. Restyle the focused appearance by passing a style object (it merges over the built-in reveal styles); the hide-until-focus behavior stays intact.

Focus management — modals trap & restore automatically

A modal that doesn't trap focus lets keyboard and screen-reader users tab out to the inert background. Pyreon's modal surfaces handle the full WAI-ARIA dialog focus lifecycle for you:

• <Overlay type="modal"> (@pyreon/elements) and the headless ModalBase (@pyreon/ui-primitives) move focus into the dialog on open, trap Tab / Shift+Tab within it while open, and restore focus to the opener on close.

• The canonical multi-platform <Modal> (@pyreon/primitives) renders a native <dialog> on web, getting the trap + inert background from the platform.

No wiring required — open a modal and focus is managed correctly.

For a modal that interrupts with an urgent, response-requiring message (a confirmation, a destructive-action warning, an error), pass alert to ModalBase — it switches role="dialog" to role="alertdialog", which screen readers announce more assertively. General dialogs leave it off. Pair it with initialFocus={() => cancelRef()} so focus lands on the safe choice (Cancel) on open — an accidental Enter then can't confirm the destructive action. By default the dialog focuses its first focusable descendant.

Keyboard navigation — built into the primitives

Every interactive headless primitive in @pyreon/ui-primitives ships full keyboard support, so a keyboard user can operate it the moment you render it:

• Calendar — Arrow keys move by day / week, Home/End to week edges, PageUp/PageDown by month (Shift = year), with WAI-ARIA grid roving focus.

• Color picker — Arrow keys step the hue / saturation-brightness / alpha sliders, PageUp/Down for large steps, Home/End to min/max.

• Tabs, Radio group, Combobox, Tree — arrow-key navigation between items per their ARIA roles.

• File upload — the drop zone is a real role="button" tab stop: Enter/Space (or a click) opens the native file picker, with aria-label, aria-disabled, and aria-busy carried automatically.

Pair the primitive's getDayProps / slider props / item props / dropZoneProps (which already carry onKeyDown + tabIndex + the right ARIA) onto your elements and the keyboard model comes with them.

Multi-platform accessibility

The canonical primitives in @pyreon/primitives carry a platform-neutral a11y vocabulary — write it once, each target emits its native model:

import { Button } from '@pyreon/primitives'

<Button onPress={addToCart} accessibilityLabel="Add to cart">
  <CartIcon />
</Button>

Prefer these over raw aria-* (which is web-only) so the same component is accessible on every target.

Reduced motion

@pyreon/kinetic animations (<Transition>, <Collapse>, the kinetic() wrapper) automatically respect the user's prefers-reduced-motion setting — when reduced motion is requested, transitions resolve instantly instead of animating. No configuration needed.

Correct ARIA by construction

• Boolean ARIA attributes serialize correctly. aria-checked={true} renders as aria-checked="true", not the presence-only aria-checked="" that assistive tech ignores — on both the client renderer and SSR.

• role is typed. The role attribute is AriaRole, so you get autocomplete for the ~70 valid roles and a type error on a typo, while still accepting any string for forward-compatibility.

Linting for the rest

Some accessibility checks are project conventions rather than framework behaviour — @pyreon/lint ships them as opt-in best-practice rules (off by default, no noise):

• pyreon/require-img-alt — every <img> needs alt

• pyreon/primitive-media-needs-label — the multi-platform analog: a canonical <Image> / <Icon> from @pyreon/primitives needs an accessibilityLabel (or alt/aria-label), or accessibilityHidden if decorative — so a label-less media primitive is caught on web, iOS, and Android alike (auto-gated on the @pyreon/primitives dependency)

• pyreon/img-requires-dimensions — intrinsic width/height to avoid layout shift

• pyreon/no-positive-tabindex, pyreon/no-autofocus, pyreon/no-redundant-role, pyreon/anchor-is-valid, pyreon/heading-order, pyreon/color-contrast, …

Enable the whole set with the best-practices preset, or per-rule in .pyreonlintrc.json:

{
  "rules": {
    "pyreon/require-img-alt": "error",
    "pyreon/no-positive-tabindex": "error"
  }
}

Several are auto-fixable (pyreon-lint --fix), and each carries a prescriptive message so AI assistants and humans alike get the fix, not just the flag.

Summary

Reach for the framework primitives — @pyreon/form, @pyreon/elements / @pyreon/ui-primitives, @pyreon/primitives, @pyreon/kinetic — and accessibility comes with them. Add announce(), <LiveRegion>, and a <RouteAnnouncer> for the dynamic bits, turn on the opt-in lint rules to guard the conventions, and you have an accessible app by default.