Toasts, error summaries, spinners, empty states and screen-reader announcements.
Results are short and past tense ("Task moved"), errors say how to fix the problem, and everything that appears on screen is also announced to screen readers.
9 parts
Short past-tense results with at most one action, like “Run archived · Undo”. Read out politely; they wait while hovered or focused.
import { Button, useToast } from '@rchursin/product/ui'
/** * Three shapes of toast: a title, a title with a line of detail, and a title with one action. * Each says what already happened, in the past tense. Hover or focus one to keep it on screen. */export default function ToastBasic() { const toast = useToast() return ( <div className="flex flex-wrap items-center justify-center gap-3"> <Button variant="secondary" onClick={() => toast({ title: 'Settings saved' })}> Title only </Button> <Button variant="secondary" onClick={() => toast({ title: 'Agent paused', description: 'New runs wait until you resume it.', icon: 'pause' })}> With detail </Button> <Button variant="secondary" onClick={() => toast({ title: 'Run archived', icon: 'archive', action: { label: 'Undo', onClick: () => toast({ title: 'Run restored', icon: 'undo' }) }, }) } > With an action </Button> </div> )}The loader icon turning once every 900 ms, only when motion is allowed. Decorative next to words; give it a label when it stands alone.
import { Button, Spinner } from '@rchursin/product/ui'
/** * Next to words that say what is happening, the spinner is decoration. On its own, give it a * label. Inside a button, use the button's loading prop. With reduced motion it is a still arc. */export default function SpinnerBasic() { return ( <dl className="grid w-full max-w-md grid-cols-1 gap-6 text-center sm:grid-cols-3"> <div className="flex flex-col items-center gap-3"> <dt className="font-mono text-[11px] tracking-[0.12em] text-fg-3 uppercase">Beside words</dt> <dd className="flex h-8 items-center gap-2 text-[13px] text-fg-2"> <Spinner className="size-4 text-fg-3" /> Syncing 3 runs… </dd> </div> <div className="flex flex-col items-center gap-3"> <dt className="font-mono text-[11px] tracking-[0.12em] text-fg-3 uppercase">On its own</dt> <dd className="flex h-8 items-center text-fg-2"> <Spinner className="size-6" label="Loading runs" /> </dd> </div> <div className="flex flex-col items-center gap-3"> <dt className="font-mono text-[11px] tracking-[0.12em] text-fg-3 uppercase">In a button</dt> <dd className="flex h-8 items-center"> <Button loading>Saving…</Button> </dd> </div> </dl> )}One heading that says what is missing, one line that says why, and one way forward, centred under an outlined icon tile.
import { Button, EmptyState, useToast } from '@rchursin/product/ui'
/** One heading that says what is missing, one line that says why, one way forward. */export default function EmptyStateBasic() { const toast = useToast() return ( <div className="w-full max-w-md rounded-2xl ring-1 ring-line ring-inset"> <EmptyState icon="run" title="No runs yet" action={ <Button size="sm" variant="secondary" icon="terminal" onClick={() => toast({ title: 'Sample: the setup steps would open here', description: 'Install the CLI, then run your agent once.', icon: 'terminal' })} > Show setup steps </Button> } > Runs show up here as soon as an agent sends its first trace. </EmptyState> </div> )}A “There is a problem” box at the top of a form that takes focus after a failed submit and links each message to its field.
import { useId, useState, type FormEvent } from 'react'import { ErrorSummary, checkEmail, checkName, type ErrorSummaryItem } from '@rchursin/product/forms'import { Button, Field, Select, TextInput, useToast } from '@rchursin/product/ui'
type Values = { name: string; email: string; team: string }
function validate(v: Values, id: string): ErrorSummaryItem[] { const errors: ErrorSummaryItem[] = [] const name = checkName(v.name) const email = checkEmail(v.email) if (name) errors.push({ id: `${id}-name`, message: name }) if (email) errors.push({ id: `${id}-email`, message: email }) if (!v.team) errors.push({ id: `${id}-team`, message: 'Choose your team' }) return errors}
const START: Values = { name: '', email: 'ana@example', team: '' }
/** * Shown as it looks right after a failed save. Each message links to its field (same words asuseAnnounce makes screen readers say a result like “Moved to Done”, politely or, for urgent things, at once. Nothing shows on screen.
import { useState } from 'react'import { useAnnounce } from '@rchursin/product/lib/announce'import { Button } from '@rchursin/product/ui'
type Heard = { id: number; text: string; politeness: 'polite' | 'assertive' }
/** * Results are polite: they wait for the screen reader to finish. Assertive is only for things * that need attention now. The list underneath mirrors what a screen reader is given, so you can * see it; press the same button twice and the sentence is still read again. */export default function AnnouncerBasic() { const announce = useAnnounce() const [done, setDone] = useState(false) const [heard, setHeard] = useState<Heard[]>([])
function say(text: string, politeness: Heard['politeness'] = 'polite') { announce(text, politeness) setHeard((all) => [{ id: (all[0]?.id ?? 0) + 1, text, politeness }, ...all].slice(0, 3)) }Progress drawn as the brand’s square, closing clockwise from the top centre, and a row of squares for a set of focus sessions.
import { SquareProgress } from '@rchursin/product/timer'
const states = [ { at: 0, state: 'running', word: 'Running' }, { at: 0.25, state: 'running', word: 'Running' }, { at: 0.7, state: 'paused', word: 'Paused' }, { at: 1, state: 'done', word: 'Done' },] as const
/** * The square closes clockwise from the top centre. The head is solid while running, hollow when * paused, and gone once the square is closed. The square is decorative: the words carry the state. */export default function SquareProgressStates() { return ( <ul className="grid w-full max-w-md grid-cols-4 gap-3 sm:gap-6"> {states.map((s) => ( <li key={s.at} className="flex min-w-0 flex-col items-center gap-2.5"> <SquareProgress size="sm" total={100} elapsed={s.at * 100} state={s.state} className="w-full max-w-[88px]"> <span className="font-mono text-[11px] text-fg-2 tabular-nums">{Math.round(s.at * 100)}%</span> </SquareProgress> <span className="font-mono text-[10px] tracking-[0.12em] text-fg-3 uppercase">{s.word}</span> </li> ))} </ul> )}In-page messages for things that happen on their own: a timer that finished, a reminder that came due.
import { useRef, useState } from 'react'import { DueBanner } from '@rchursin/product/notes'import { FinishedBanner } from '@rchursin/product/timer'import { Button } from '@rchursin/product/ui'
// Sample times, fixed so the page renders the same everywhereconst nine = new Date(2026, 9, 21, 9, 0).getTime()const twoTwentyFive = new Date(2026, 9, 21, 14, 25).getTime()
/** * Two in-page banners. “Due now” is the inverse bar from Reminders; “finished” is the card from the * timers. live={false} here so nothing is announced when the page loads; in an app, leave it on. */export default function BannersOverview() { const [due, setDue] = useState([{ id: 'r1', text: 'Rerun the scan after merging skills', at: nine, repeat: null, done: false }]) const [finished, setFinished] = useState(true) const again = useRef<HTMLButtonElement>(null) const clear = () => { setDue([]) window.requestAnimationFrame(() => again.current?.focus())A question asked in place of the buttons, never with window.confirm: “Abandon this session?” with Keep going first.
import { useEffect, useRef, useState } from 'react'import { AbandonQuestion, PhaseChip } from '@rchursin/product/timer'import { Button } from '@rchursin/product/ui'
type View = 'asking' | 'running' | 'abandoned'
/** * The question replaces the controls in place: no window.confirm, no dialog. It opens on “Keep * going” (the safe choice), Esc means keep going, and focus always lands on the control that * replaced the one you pressed. */export default function InlineConfirmSession() { const [view, setView] = useState<View>('asking') const [paused, setPaused] = useState(false) const [focusNext, setFocusNext] = useState<'keep' | 'abandon' | 'start' | 'pause' | null>(null) const keepRef = useRef<HTMLButtonElement>(null) const abandonRef = useRef<HTMLButtonElement>(null) const startRef = useRef<HTMLButtonElement>(null) const pauseRef = useRef<HTMLButtonElement>(null)
A quiet line under an editor: “Unsaved changes”, “Saving…”, “Saved · 2 min ago”, and what happens next when a save can’t go through.
import { useEffect, useRef, useState } from 'react'import { useNow } from '@rchursin/product/calendar/hooks'import { AutosaveStatus, type SaveState } from '@rchursin/product/notes'import { Field, Switch, Textarea } from '@rchursin/product/ui'
const DEBOUNCE_MS = 800 // save this long after the last keyconst ROUND_TRIP_MS = 450 // stands in for the network
/** * Type: “Unsaved changes”, then “Saving…” 800 ms after you stop, then “Saved · just now”, which * stays and keeps counting. Turn on the offline switch to see how a save waits for the connection. * Nothing leaves this page; the save is simulated. */export default function AutosaveEditor() { const now = useNow().getTime() const [text, setText] = useState('Split the cost report by model before Friday.\nFlag every run over a dollar.') const [state, setState] = useState<SaveState>('saved') const [savedAt, setSavedAt] = useState(() => Date.now()) const [offline, setOffline] = useState(false) const timer = useRef<number | undefined>(undefined)Runs show up here as soon as an agent sends its first trace.
Sent to screen readers
Nothing yet. Press a button.