c2n/web-componentsv1.0.26
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Quantity Picker

Several labelled counters behind one summary ("2 adults, 1 child"), with limits per counter and in total.

c2-quantity-picker

The guests picker of Airbnb and Booking.com: a trigger that sums up several counts ("2 adults, 1 child") and opens a panel of labelled counters, each a c2-quantity child with its own limits.

The summary joins each counter's count and noun (singular/plural, chosen with Intl.PluralRules) with Intl.ListFormat, leaving out counters at 0; summary replaces it with a function of your own, and placeholder shows while every counter is 0. max-total caps the sum: at the limit every + is off and the note says so. inline drops the trigger and the popover, for a booking panel that shows the counters directly.

The panel is a popover under the trigger: Escape, a click outside or "Done" closes it and focus returns to the trigger. Each counter's value is a spinbutton (↑ ↓ Home End), and a change is announced with the new summary. input fires on every step and change when the panel closes after a change (at once when inline), both with { values, total }. The picker is form-associated: inside a <form> each counter with a name submits its count under that name; a form reset restores the counts the counters started with, and a disabled fieldset disables it.

Attributes

NameTypeDefaultDescription
labelstring—What is counted ("Guests"): the trigger's caption and the group's name.
placeholderstring—The trigger's text while every counter is 0. Default: "None".
max-totalCustomEvent—The most the counters may add up to.
inlinebooleanfalseShows the counters directly, with no trigger or popover.
disabledbooleanfalseTurns the trigger and every counter off.
openbooleanfalseWhether the panel is open.

Slots

NameDescription
(default)The c2-quantity counters.
chevron-iconThe trigger's chevron.

Events

NameTypeDescription
inputCustomEvent<{ values: Record<string, number>; total: number }>Fired on every step.
changeCustomEvent<{ values: Record<string, number>; total: number }>Fired when the panel closes after a change, or on every step when inline.

CSS parts

Shadow DOM styling hooks used with ::part(name). Prefer CSS custom properties when they cover the change.

NameDescription
triggerThe button that opens the panel.
panelThe panel of counters.

CSS custom properties

Grouped by semantic target and state from --c2-<component>__<target>__<state>--<property>. Click a group to collapse it; click a name to copy it.

NameTypeDefaultDescription
c2-quantity-picker
--c2-quantity-picker--widthpixel280pxThe trigger's width.
c2-quantity-picker > panel
--c2-quantity-picker__panel--widthpixel320px
--c2-quantity-picker__panel--paddingpadding8px 16px
--c2-quantity-picker__panel--borderborder1px solid #e4e4e7
--c2-quantity-picker__panel--border-radiusborder-radius8px
--c2-quantity-picker__panel--backgroundcolor#ffffff
--c2-quantity-picker__panel--box-shadowshadow0 8px 24px rgba(0, 0, 0, 0.12)
c2-quantity-picker > trigger
--c2-quantity-picker__trigger--paddingpadding8px 12px
--c2-quantity-picker__trigger--borderborder1px solid #bcbcc6
--c2-quantity-picker__trigger--border-radiusborder-radius6px
--c2-quantity-picker__trigger--backgroundcolor#ffffff
--c2-quantity-picker__trigger--colorcolor#18181b
c2-quantity-picker > trigger > hover
--c2-quantity-picker__trigger__hover--borderborder1px solid #a1a1aa
c2-quantity-picker > trigger > open
--c2-quantity-picker__trigger__open--borderborder1px solid rgb(2, 101, 220)
c2-quantity-picker > trigger > focus
--c2-quantity-picker__trigger__focus--outlineoutline2px solid rgba(2, 101, 220, 0.4)
c2-quantity-picker > label
--c2-quantity-picker__label--colorcolor#71717a
--c2-quantity-picker__label--font-sizefont-size12px
c2-quantity-picker > divider
--c2-quantity-picker__divider--borderborder1px solid #e4e4e7The line above the panel's footer; the counters draw their own (--c2-quantity__divider--border).
c2-quantity-picker > note
--c2-quantity-picker__note--colorcolor#71717a
--c2-quantity-picker__note--font-sizefont-size12px

Text and languages

The text the component shows, in English. It shows another language when the app adds one with addTranslations, under quantity-picker, and the nearest lang asks for it; any message not translated stays in English. {0}, {1}… stand for the values a message carries. Languages guide.

KeyEnglishValues
noneNone—
doneDone—
decreaseDecrease {0}{0} label
increaseIncrease {0}{0} label
upToUp to {0}{0} max
full{0} of {1}, the most allowed{0} total
{1} max
changedNow {0}{0} summary

c2-quantity

One counter of a c2-quantity-picker: a label, an optional hint and a stepper. The reader steps it with the − and

  • buttons, or with ↑ ↓ Home End on its value, which is a spinbutton (the one tab stop of the counter).

singular and plural are the nouns the picker's summary uses ("2 adults, 1 child"); a counter without them is summed into the summary as its label. name is its key in the picker's values.

Attributes

NameTypeDefaultDescription
valuenumber0The count.
minnumber0The least it may count.
maxCustomEvent—The most this counter allows; the picker's max-total may stop it sooner.
stepnumber1How much each press or arrow key adds or takes away.
namestring—The counter's key in the picker's values. Default: its label in lower case.
singularstring—The singular noun of the summary ("adult").
pluralstring—The plural noun of the summary ("adults").
disabledbooleanfalseTurns the counter's buttons and keys off.

Slots

NameDescription
(default)The counter's label ("Adults").
hintA line under the label ("Ages 13 or above").
decrement-iconThe − button's icon.
increment-iconThe + button's icon.

CSS parts

Shadow DOM styling hooks used with ::part(name). Prefer CSS custom properties when they cover the change.

NameDescription
stepperThe − value + group.

CSS custom properties

Grouped by semantic target and state from --c2-<component>__<target>__<state>--<property>. Click a group to collapse it; click a name to copy it.

NameTypeDefaultDescription
c2-quantity
--c2-quantity--paddingpadding12px 0
--c2-quantity--gappixel12px
c2-quantity > label
--c2-quantity__label--font-weightfont-weight500
c2-quantity > hint
--c2-quantity__hint--colorcolor#71717a
--c2-quantity__hint--font-sizefont-size12px
c2-quantity > button
--c2-quantity__button--sizepixel32px
--c2-quantity__button--borderborder1px solid #bcbcc6
--c2-quantity__button--border-radiusborder-radius999px
--c2-quantity__button--colorcolor#18181b
--c2-quantity__button--backgroundcolortransparent
c2-quantity > button > hover
--c2-quantity__button__hover--borderborder1px solid #a1a1aa
c2-quantity > button > disabled
--c2-quantity__button__disabled--opacityopacity0.38
c2-quantity > focus
--c2-quantity__focus--outlineoutline2px solid rgba(2, 101, 220, 0.4)
c2-quantity > value
--c2-quantity__value--min-widthpixel24px
c2-quantity > divider
--c2-quantity__divider--borderborder1px solid #e4e4e7The line above every counter of a picker after the first.
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power.ChartStatus LightColoured dot plus a short label for the state of something, such as Live, Building or Failed.Data displayStatus PanelCommunicate empty states, operation outcomes and recoverable errors with clear next steps.FeedbackStepsThe trace of a task as it runs, or a stepper across the top of a view: statuses, durations, stages that open while they work, and steps the reader can select.Data displayStickyPins content to the top or bottom of its scroll container and tells you when it is stuck, optionally hiding it while the reader scrolls down.LayoutStreaming TextPlain text that arrives in bursts, such as an LLM answer, revealed at a steady pace behind a caret.ChatSunburst chartA hierarchy drawn as rings, the whole at the centre and each ring splitting its parent: budgets, disk usage and org spend, with click to zoom.ChartSwipe ActionA list row that slides sideways to reveal actions behind it, as in a mail or task list on a phone.LayoutSwitchOn/off toggle on a native switch input, with label, description and thumb icons.InputsTableVirtualized data grid with declarative columns, sorting, selection, pinning and resizing.Data displayTable Of ContentsAn "On this page" navigation that lists the headings of a document, nests them by level and highlights the section being read.NavigationTabsTab strip that shows one content panel at a time.NavigationTag InputTurns typed or pasted text into removable tags — recipients, keywords, labels — with configurable delimiters, parsing and validation.InputsTerminalAn interactive prompt for commands your app answers: history, Tab completion, streaming output, Ctrl+C, ANSI colours.Editors & viewersText EffectAnimated text for a hero line or a status: rotating words, a typewriter, a scramble, a shimmer or a staggered reveal.Data displayText FieldSingle-line input with icon slots, clear button, helper and error text, and a character counter.InputsTextareaMultiline text input with resizing, helper and error text, and a character counter.InputsTheme SelectColour-theme switcher: click to step to the next mode, hover for the full menu.InputsTime InputForm-associated time-of-day input with a scroll-wheel picker, step and range constraints, helper text and error states.InputsTime Range PickerDashboard time range control: searchable quick ranges, an absolute range typed or picked on a calendar, time zone, shift and zoom, and auto-refresh.InputsTime Slot PickerPick a free time from someone's calendar: a row of days, then that day's times grouped into morning, afternoon and evening.InputsTimelineA vertical sequence of dated events on a connected rail: order history, activity feeds, changelogs.Data displayToastNotification cards and a manager for stacked, queued notifications with independent lifetimes.FeedbackTodo ListA to-do list with the feel of paper: hand-drawn ticks, notes, highlighters, swipe and drag, and a remembered look.PlanningToggletipA small ⓘ button that opens a help bubble on click or tap; the bubble can hold links and is announced to screen readers.FeedbackTooltipContextual hint shown when its target is hovered or focused, rendered in the top layer.FeedbackTourA guided product tour that spotlights one element at a time and explains it in a panel beside it.FeedbackTrace WaterfallShow the spans of a distributed trace as a tree, each with a duration bar on one shared time axis.Data displayTranscriptSpeaker-labelled, timestamped segments synced to playback: click to seek, the word playing marked, search built in.Data displayTreeHierarchical tree view with expansion, selection, checkboxes and lazy loading.Data displayTree SelectA dropdown for picking one or several rows from a hierarchy, with checkboxes, search and a form value.InputsTreemap chartA whole split into nested rectangles, each sized by its value: market maps, budgets and disk usage.ChartTruncateClamps text to a number of lines, with an optional Show more button.Data displayUploadDrag-and-drop file selection with validation, upload progress, retry, cancellation, and attachment results.InputsVideo GridLays out the tiles of a call as a grid, a spotlight or a sidebar, every tile as large as the space allows.LayoutVideo PlayerThemed controls over a real video: chapters on the seek bar, a thumbnail while scrubbing, captions, speed, picture-in-picture and full screen.Data displayVideo TileOne participant of a call: their video or avatar, with their name, a live microphone meter and status badges.Data displayView OptionsThe Display popover of a collection: layout, grouping, ordering on several levels, Show switches and visible properties, reported as one plain value.InputsVirtual ListWindowed list with built-in search, sorting, selection and an async data source.Data displayVisually HiddenText for screen readers only: kept in the accessibility tree, drawn nowhere, optionally shown while it holds focus.LayoutWaterfall chartA running total bridged by the steps that move it, where one row is one step and totals mark where the bridge lands.ChartWeek PlannerWeekly schedule with time blocks: a typical week with optional odd and even weeks, or a dated week the user edits.PlanningWheel PickeriOS-style scroll wheels to pick a time, a height, a weight or any value from a short list, by swipe, scroll, click or keys.InputsWorking IndicatorA live "work in progress" line: animated mark, shimmering label, trailing dots and elapsed time.FeedbackFeather Icons287 open-source Feather icons, one web component each.IconsMat Icon2,234 Material Icons ligatures rendered through a single element.IconsPhosphor Icons1,512 flexible icons in six weights, one web component each.IconsSymbols157 themeable spot illustrations for empty states, status panels, onboarding and error pages.IconsTask icons191 duotone icons for to-do items: work, home, health, sport, learning, food, money, travel and more.IconsThemingTheme every c2n component from a handful of design tokens with @c2n/theme, or reach for any component variable directly.GuideLanguagesComponents show their text in English; add your app’s languages as one JSON object, picked by the nearest lang.GuideFrameworksUse the components from React, Vue, Angular, Svelte, Lit or plain HTML — typed events, generated template types, and the one piece of configuration each framework needs.GuideUsing c2n in an applicationThe workflow behind every c2n app: load the theme once, use c2-* tags directly, and turn every repeated pattern into a small variant or composed component.GuideAI toolsGive Claude Code, Codex, Google Antigravity or GitHub Copilot the c2n skill, live component APIs, examples and application conventions.GuideNo components match.
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