c2n/web-componentsv1.0.26
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Steps

The 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.

c2-steps is a list of c2-step rows — vertical by default, or side by side with orientation="horizontal". Each row is a marker, a label, an optional dimmed detail beside it and trailing text at the end — a duration, a count, a timestamp.

A step with sub-steps is a group, and a group is a disclosure: its own row is the summary and its sub-steps are the detail. There is no second element to learn — the same tag is a leaf or a group depending on what is inside it. That is what makes a long run readable: the list keeps the shape of the task while the detail of each stage stays one click away.

Every step is a row, and every row is visible. A group starts expanded and nothing ever folds one away on its own: the chevron is there for the reader, and collapsed in the markup starts a stage folded. The run only ever brings a folded stage back into view — one the reader put away reopens when it starts running (running, current) or when something in it goes wrong (error, warning).

A step is one row. Label, detail and trailing text sit on a single line and truncate with an ellipsis rather than wrapping, so a hundred-step trace stays scannable. A sub-step is indented by exactly the marker’s width plus the row gap, so its marker lands under its parent’s label — that alignment is all the nesting needs, and nothing else is drawn for it. --c2-step__guide--width: 1px adds file-tree rules if you want them, and the toggle slot adds a chevron; both are off by default.

The detail sits beside the label by default, which is what a trace wants — a path or an id read as an aside to the name. --c2-step__text--flex-direction: column puts it on its own line underneath instead, which is what a wizard’s descriptions want. That one variable is the whole switch: the gap between them and their alignment follow it. Two lines on purpose, and each of them is still one line.

A parent takes the status of the worst thing inside it when it authors none of its own, so a stage reports that it is running, or that something under it failed, without you setting it.

Author it either way, and mix them freely: slot c2-step children, or hand c2-steps a steps array of { id, label, detail, trailing, status, children } and it renders the tree itself. The array wins when both are present.

The connector rail is off by default, because a trace does not want one. Give --c2-step__rail--width a width and a stepper gets its rail. Numbering follows the tree: marker="number" draws a dotted path, so the first child of the third step reads 3.1 rather than a second 1.

Horizontal. orientation="horizontal" lays the top-level steps out side by side, each a column with its marker on a connector rail and its text underneath. The rail always links one step to the next: it starts right after a step’s marker and runs through the gap to where the next step begins, whatever the widths and paddings (--c2-step__rail__horizontal--width, 2px, sets its thickness). Sub-steps are not drawn in a horizontal list, but a group still takes their status, so a stage reads as running or failed.

The text can sit anywhere around the marker — under it, over it, after it or before it. That is one variable, --c2-step__row__horizontal--grid-template-areas, naming where the marker, rail, text and trailing cells go on a three-column grid (auto auto 1fr). The rail always takes the last column, so it still links the steps:

Text--c2-step__row__horizontal--grid-template-areas
under (the default)"marker rail rail" "text text text" "trailing trailing trailing"
over"text text text" "trailing trailing trailing" "marker rail rail", with --c2-step__row__horizontal--align-content: end
after the marker"marker text rail" ". trailing ."
before the marker"text marker rail" "trailing . ."

Every marker of a list hangs from the same line, so the rails line up from step to step whatever text each one has.

Interactive. interactive turns every row that is not a disclosure into a button, and the list keeps one selected step — see Selecting a step.

Import

import '@c2n/components/steps'

The examples use icons from the separate @c2n/feather-icons package: npm install @c2n/feather-icons.

Usage

1lintpassed2tsconfig.lib.jsontype-check3testqueued

Selecting a step

A list of steps is often the navigation of the view under it: a task with a Process step and a Result step shows the log while it runs and the result once it is done — and the reader should be able to go back to the log at any time. interactive is that:

  • Every row that is not a disclosure becomes a <button>. A group’s row in a vertical list stays its disclosure.
  • The list keeps one selected step in selected, named by the step’s value (a data node’s id) or, when it has none, by its dotted path (2, 1.3). The selected row only changes its label colour (--c2-step__label__selected--color); --c2-step__row__selected--background, --c2-step__row__selected--box-shadow and --c2-step__label__selected--font-weight add more when a design wants it. It is announced with aria-current.
  • Pressing a step selects it and fires selection-change with { value, path }. Setting selected (or calling select(value)) moves the selection from code; only select() fires the event.
  • disabled keeps a step from being selected — a result that does not exist yet.
  • Selection is independent of status. The list never moves it on its own, so the run decides when the view switches, and the reader’s choice is never taken away from them.
<c2-steps orientation="horizontal" interactive selected="process" aria-label="Task">
  <c2-step value="process" status="running" label="Process"></c2-step>
  <c2-step value="result" label="Result" disabled></c2-step>
</c2-steps>
const steps = document.querySelector('c2-steps')
const [processStep, resultStep] = steps.querySelectorAll('c2-step')

// The reader pressed a step: show its panel.
steps.addEventListener('selection-change', (event) => showPanel(event.detail.value))

// The task finished: enable the result and move the view there.
processStep.status = 'success'
Object.assign(resultStep, { status: 'success', disabled: false })
steps.selected = 'result'
showPanel('result')

Press Run the task, then select Process again once the result is in:

Run the taskReset

Driving a run

A trace usually arrives as data. Hand over the shape of the task once, then tick one step at a time — updateStep finds a step by id and redraws without rebuilding the array, which is what a runner wants when it fires hundreds of times:

const trace = document.querySelector('c2-steps')

trace.steps = [
  { id: 'build', label: 'build', children: [{ id: 'install', label: 'install dependencies' }, { id: 'compile', label: 'compile' }] },
  { id: 'test', label: 'test', children: [{ id: 'unit', label: 'unit' }, { id: 'e2e', label: 'e2e' }] },
]

// The parent stage rolls the status up on its own.
trace.updateStep('install', { status: 'running' })
trace.updateStep('install', { status: 'success', trailing: '19 s' })

Nothing stops you doing the same to slotted markup — a c2-step is an element, and setting status on it is enough — as a property or an attribute. The step tells its list, so a stage rolls its status up from that alone:

document.querySelector('c2-step[data-id="e2e"]').status = 'running'

Watching a run

A static example can only show one frame of a trace. Press Run the task and watch the rows arrive:

Run the taskResetCollapse allExpand all

Each step is appended the moment the runner reaches it, so you are watching rows arrive rather than a list redraw. A stage takes its status from the steps inside it, and gives one beat when it settles.

What moves while it runs

A trace being written in front of you should look like it. Two things move, and neither needs anything from you:

  • A step that arrives while the list is already on screen grows into place from a collapsed row and fades in, rather than snapping the rows below it down the page. A step drawn with the list does not — a whole trace fading in at once is a page loading, not an arrival.
  • A status that settles gives its marker one beat. Again only a status that actually changed: a trace rendered complete sits still.

--c2-step--enter-duration (260ms) and --c2-step--enter-translate (-4px) shape the arrival, and 0s turns it off; --c2-step--transition-duration (150ms) covers the colour transitions and the beat. prefers-reduced-motion: reduce turns all of it off.

Give every node a stable id. That is what lets the list reuse a step’s DOM across renders instead of rebuilding it — without one a step is identified by its position, so inserting anywhere but the end recreates the rows after it, and they all animate in as if they were new.

collapseAll() folds every group away, leaving the top-level stages; expandAll() brings them all back.

A group announces itself when it is folded away or brought back. The event bubbles, so one listener on the list hears them all:

trace.addEventListener('step-toggle', (event) => {
  console.log(event.target.label, event.detail.path, event.detail.collapsed)
})

Styling by state

A step never writes an attribute on its own host, so server-rendered markup matches the hydrated element: neither the status the list rolls up nor a collapsed the reader toggles is reflected. Page CSS reads a step through its custom states instead:

StateWhen
:state(pending), :state(running), :state(current), :state(success), :state(error), :state(warning), :state(skipped)The step’s current status, authored or rolled up
:state(collapsed)A group is folded away
:state(has-children)The step has sub-steps, so it is a group
:state(last)The last step of its group
:state(grouped)The list holds a group anywhere
:state(marker-icon), :state(marker-number), :state(marker-none)The list’s marker mode
:state(entering)A step that arrived in a running trace is growing into place
:state(settling)Its marker is giving the beat of a status that changed
c2-step:state(error) {
  --c2-step__row--background: #fef2f2;
}

Earlier releases wrote entering, settling, last, marker, grouped and has-children attributes on the host and reflected status and collapsed; replace c2-step[last] with c2-step:state(last), c2-step[marker='number'] with c2-step:state(marker-number), c2-step[status='error'] with c2-step:state(error), and likewise for the others. An authored status or collapsed attribute still works.

Rendering a row yourself

Everything the markup fills with a slot, the data-driven mode fills with a renderer — the two modes have the same reach, and a renderer is simply the function form of the slot:

Part of the rowIn markupFrom steps
the icon<span slot="marker">renderMarker
the primary text<span slot="label">renderLabel
the dimmed text beside it<span slot="detail">renderDetail
the text at the end<span slot="trailing">renderTrailing
the disclosure affordance<span slot="toggle">renderToggle
all of the text at once—renderItem

Every renderer is handed the node, its depth, its position, its dotted path and the status actually in effect, and returns anything Lit renders — a string, an <svg>, an icon element:

import '@c2n/feather-icons/icons/alert-triangle.js'
import { html } from 'lit'

// An icon of your own instead of the status glyph, per step.
trace.renderMarker = ({ node, status }) =>
  status === 'warning' ? html`<c2-feather-alert-triangle></c2-feather-alert-triangle>` : node.icon

// A duration that ticks while the step is running.
trace.renderTrailing = ({ node, status }) => (status === 'running' ? elapsedSince(node.startedAt) : node.trailing)

renderItem takes over the row’s text — it overrides renderLabel, renderDetail and renderTrailing. The marker and the disclosure are their own columns rather than part of that text, so renderMarker and renderToggle still apply alongside it:

trace.renderItem = ({ node }) => html`<a href=${node.href}>${node.label}</a> <c2-badge>${node.count}</c2-badge>`
trace.renderMarker = ({ node }) => node.icon
AccordionConnected, animated panels with shared borders and single or multiple expansion.LayoutAction BarA floating bar for the current selection: the count, the bulk actions and a button that clears it.LayoutAddress fieldA postal address input with the parts, order and labels of each country, optional autocomplete from your address provider.InputsAngle SliderA round knob to pick a direction on a full circle, or a value along an arc like a thermostat or volume dial, by drag or keys.InputsApp ShellThe frame of an application: header, navigation, main, an optional details panel, banner and footer, laid out from its own width.LayoutArea chartA line chart with the region under each line filled — every line-chart attribute, plus a fill opacity.ChartAttachmentFile and image attachments with metadata, upload progress, failure states, and actions.Data displayAudio PlayerWaveform playback for voice notes and recordings: the waveform is the seek bar, with the time, a speed toggle and an optional transcript.Data displayAudio VisualizerLive audio level as bars, a waveform or an orb: the mic meter of a call, a voice message, a voice assistant.Data displayAutocompleteSearchable combobox for local or remote items with customizable list rows.InputsAvatarImage, initials or icon for a person, with status dot and badge.Data displayBackdropA container that draws a decorative pattern behind its content: dots, a grid, stripes, flicker, aurora or meteors.LayoutBadgeTinted pill for status text, counts and dots, optionally pinned to a corner of another element.Data displayBannerA persistent, full-width message in the page flow for system notices, outages and account status.FeedbackBar chartBars over categories or time buckets, with several series drawn side by side within each band.ChartBar ListA ranked list whose rows carry their own bar: top pages, referrers, countries, or the changes between two periods.Data displayBarcodeA 1D or 2D barcode drawn as SVG in the browser: Code 128, EAN-13, EAN-8, UPC-A, Code 39 and Data Matrix.Data displayBarcode ScannerReads barcodes and QR codes with the camera: a scan window, single or continuous scanning, a beep, the camera light, and a scan event with the value and the format.InputsBeamAn animated line between two elements, for data-flow and integration diagrams.LayoutBorder BeamA decorative beam that travels around the border of any positioned container.LayoutBottom NavThe mobile tab bar: three to five destinations along the bottom of the screen, each an icon over a short label with a count or dot badge.NavigationBox plot chartThe distribution of each category as its median, quartiles, whiskers and outliers: latency per service, test scores, A/B results.ChartBreadcrumbNavigation trail of link buttons with separators, a current page and optional collapsing.NavigationBubble chartAn ECharts scatter plot with a third measure encoded as bubble area, for comparing how two measures relate while showing how much each point weighs.ChartBullet chartOne measure against a target and qualitative bands, a row per KPI, as Stephen Few drew it for scorecards.ChartButterfly chartTwo series back to back on a shared category axis, the categories named between them. The population pyramid is the classic case.ChartButtonThemeable button with slots for text, prefix, suffix and running icons.ButtonsButton GroupJoined actions and polished segmented controls with single or multiple selection.ButtonsCamera CaptureA camera viewfinder for documents, cards and faces: a framing guide, quality hints, auto-capture when steady, retake or keep, front/back switch and a list of required shots. Each photo is a Blob.InputsCandlestick chartAn ECharts OHLC chart for market sessions and other open-close ranges, with semantic positive and negative colours.ChartCardGroups related content and actions on a single bordered surface.LayoutCard InputCard number, expiry date and security code in one field, formatted as the brand prints them and checked as they are typed.InputsCarouselA swipeable slideshow with previous/next controls, indicators, looping and optional autoplay.LayoutCascaderSelect a value from related, multi-level data in one floating panel.InputsCelebrationConfetti, a burst of sparks or rising emoji for a moment worth marking, fired from code or a click.FeedbackChange ReviewReview proposed edits hunk by hunk: accept or reject each change, then take the resulting text.Editors & viewersChat InputAuto-growing message composer with keyboard submission, toolbar actions and native form support.ChatChat MessageFlexible message row for conversations, assistant answers and activity updates.ChatChat Message ListScrolling conversation log that follows new messages, counts unread ones and loads older history.ChatCheckboxNative checkbox behaviour in a quiet, themeable box with an opt-in hover layer.InputsCheckbox groupCheckboxes grouped into one form control with a value array, a group label and an at-least-one rule.InputsChipA compact pill for a filter, a choice or an entered value: selectable as a toggle, removable with a button or the keyboard.InputsChip GroupA single row of chips or badges that collapses whatever does not fit into a +N indicator, recomputed as the row or its items change size.Data displayChoice MatrixRows × columns of checkboxes or radio buttons in one form control: permissions, notification settings, agreement scales.InputsChord chartFlows between groups around a circle, where one row is one flow from a source to a target.ChartCitationA numbered inline marker that names its source, with a hover preview of the page it cites.ChatCode EditorEditable, syntax-highlighted source field on CodeMirror 6, themed entirely through CSS variables.Editors & viewersCode ViewerSyntax-highlighted code with line numbers, copy button and dark mode, powered by shiki.Editors & viewersColor AreaTwo-dimensional area for picking saturation and value of a colour.InputsColor SelectColour swatch that opens a full picker built from area and slider.InputsColor SliderHorizontal slider for choosing a hue from 0 to 360.InputsCommandA searchable list of commands: type to filter, arrows to highlight, Enter to run. The core of a ⌘K palette.NavigationComment ThreadOne conversation on a piece of content: the first comment and its replies, a reply box, edit and delete on your own comments, and Resolve.ChatComparison BarSegmented ratio bar comparing two or three quantities, such as the bid/ask balance of an order book.Data displayConfirm DialogAsks the user to confirm an action: await show() or confirm() for a true/false answer, with a destructive variant and an async confirm action.FeedbackContext MenuA menu opened by right-clicking or long-pressing an area, built from a slotted c2-menu or a render function per clicked spot.NavigationCopy ButtonButton that copies text to the clipboard — the element it sits in, another element by id, or a literal string.ButtonsCountdownTime left until a date, or through a timer, drawn as segments, a clock or a phrase, and kept current to the second.Data displayDashboardGrid of resizable panes, dragged by the edges they share.LayoutDate InputForm-associated single-date input with native picker, constraints, helper text and error states.InputsDate SelectorAccessible one- or two-month calendar for choosing a date range, one date or several dates.InputsDate StripA row of days to pick one from, a week at a time, with dots on the days that have something on them.InputsDate Time PickerForm-associated date-and-time field with a calendar and time popup, min/max/step constraints and an IANA time zone.InputsDepth chartCumulative bid and ask size around the mid price of an order book, as trading screens show market depth.ChartDescription ListRead-only label and value pairs for a detail page, in columns that wrap with the available width.Data displayDetailsCollapsible disclosure built on native details and summary.LayoutDevice FrameA browser window, phone, tablet or laptop drawn around a screenshot or live content.LayoutDiff ViewerRead-only line diff of two texts, unified or side by side, with folded unchanged lines and word highlights.Editors & viewersDistribution BarOne 100% stacked bar of a breakdown, with a legend of shares and the hovered part brought forward.Data displayDuration InputA text field for an amount of time: reads 1h 30m, 90m, 1.5h or 1:30 and stores seconds.InputsEmoji PickerA searchable grid of emoji in categories, with skin tones and the emoji used last.InputsFacet ListOne facet of a filter sidebar: an attribute’s values with counts, to include or exclude from a search.InputsFieldsetGroups related controls under a legend, with a description, a group-level error and a disabled state that reaches every control inside.InputsFile browserFolders and files with a folder tree, breadcrumbs, search, list and grid views, selection, a context menu, renaming and drag and drop.Data displayFilter BuilderA filter bar of sentence chips (Status is any of Active), an add-filter picker and an editor for each part; it reports a plain JSON filter tree.InputsFloat ButtonA floating action button for the main action of a screen, which can expand into a speed dial of related actions.ButtonsFloating PanelA window inside the page that the user drags, resizes, minimises and maximises, without blocking the page.LayoutFlowA pipeline, dependency graph or database schema on a pannable canvas: steps with a status, smooth edges, rows joined row to row, auto layout, draggable nodes saved to localStorage, a hover card and a context menu.Editors & viewersFormForm container with validation timing, an error summary, server errors, dirty tracking and async submit.InputsForm FieldLabel, hint, error, warning and character counter around any form control, wired for assistive technology.InputsFormat DateA date and time formatted for the reader's language and, optionally, a fixed time zone.Data displayFormat NumberA number formatted for its locale: currency, percent, units, compact counts and byte sizes, from Intl.NumberFormat.Data displayFX ConverterTwo linked amount and currency fields: type what you send or what arrives, with the fee, a swap and a guaranteed rate.InputsGanttA read-only project timeline: tasks, groups, milestones and dependencies on a day, week or month scale.PlanningGauge chartA focused radial KPI gauge drawn by ECharts, with a configurable scale, progress arc and pointer.ChartGoogle MapGoogle Maps with markers, a road route from A to B, and Street View, loaded once per page from a browser key.Data displayHeaderArranges brand, navigation, actions and a mobile trigger in a reusable site shell.LayoutHeatmap chartRows binned into cells by two keys, aggregated, and coloured by a sequential, diverging or stepped scale: a currency matrix, pair × tenor, hour × weekday, or a calendar of days. Drawn by ECharts, with a colour key that counts, marks and filters.ChartHighlightMarks the parts of a text that match a search query.Data displayHover CardInteractive preview card shown when a link or mention is hovered or focused, rendered in the top layer.FeedbackIcon ButtonRound, hoverable button wrapping a slotted SVG icon.ButtonsImageImage with lazy loading, a loading placeholder, an error fallback, click-to-load for untrusted URLs and a full-screen preview.Data displayImage annotatorArrows, boxes, text, numbered steps, blur and redaction over an image, exported as a PNG and as shapes.Editors & viewersImage CompareA before/after slider: two layers on top of each other, the after layer cut at a divider the reader drags.Data displayImage CropperChoose the part of an image to keep by moving and resizing a selection, then read it back as a canvas or a blob.Editors & viewersImport MapperThe mapping step of a spreadsheet import: match each column of the file to a field, check the required ones, then preview the rows with their errors.InputsIn ViewReacts when its content scrolls into view: reveal it, load more, or pause it when it leaves.LayoutIndicatorSolid dot or count pinned to an edge or corner of any element, with an accessible name for the count.Data displayInline EditText that turns into a field on click: Enter (Ctrl/⌘+Enter when multiline) commits, Escape cancels, and any control with a value that fires change can be the editor.InputsJSON FormA form generated from a JSON Schema, laid out by the schema, a UI schema or your own markup.InputsJSON ViewerBrowse a JSON value as a collapsible tree, search it, and copy any path or value.Editors & viewersKanbanBoard layout and card movement by pointer or keyboard, with cards drawn by your own renderItem.PlanningKbdKeyboard key label for shortcuts and command hints, with the semantics of the native kbd element.Data displayKey Value EditorEditable KEY=value rows for environment variables and headers: paste a .env file to split it into rows, mask secret values, and flag duplicate or malformed keys.InputsKeypadA phone-style numeric keypad that types an amount, fills PIN dots or drives another field, with a slot for a biometric key.InputsLabelCaption that names and activates the control referenced by its for attribute, with a required marker.InputsLine chartA line chart over a time or numeric x axis, drawn on canvas by uPlot, with series declared as children.ChartLink ButtonText-styled control for link and navigation actions, rendered as a real anchor or a button.NavigationListVertical list container with single or multiple selection.Data displayList ItemSelectable row with icon slots, used on its own, as the option of list and select, or as a navigation link with collapsible groups.Data displayLoading OverlayCovers a region while it loads: the content stays in place, dimmed and blocked, with a spinner and an announced label.FeedbackLog ViewerExplore large logs with variable-height virtual scrolling and sticky tabular attributes.Editors & viewersMap chartA choropleth and point map on vector outlines, drawn by ECharts: regions shaded by a value, with layers of sized points and flow lines, on the bundled world and US maps or your own GeoJSON, TopoJSON or SVG.ChartMarkdownSafe markdown renderer that streams: chat answers and READMEs, with code, math and diagrams.ChatMarkerAn inline marker that highlights, underlines, strikes through, boxes or circles a run of text.Data displayMarqueeA strip that scrolls its items in a continuous loop, for logo walls, testimonials and ticker tapes.LayoutMask InputA text input that fits what is typed to a pattern, for postcodes, IBANs, tax IDs, expiry dates and other fixed formats.InputsMasonryAutomatically pack differently sized dashboard tiles, then move or resize them in edit mode.LayoutMaster DetailA list beside the record it opens, one pane at a time with a Back step when the element is narrow.LayoutMathTeX formulas rendered as native MathML: no font CSS, readable by screen readers, safe for untrusted input.Data displayMenuCommands, links, checkboxes and submenus in a popover anchored to a trigger.NavigationMenubarDesktop-style File, Edit and View menus in one bar, with the arrow-key and hover movement of an application menu bar.NavigationMermaidMermaid text diagrams drawn in your theme colours, loaded on demand and safe for untrusted sources.Data displayMeterA measurement inside a known range — storage, quota, strength — with native meter thresholds and an optional segmented breakdown.Data displayMind MapAn idea tree laid out around a central topic, with keyboard editing as in XMind and Miro.Editors & viewersModalDialog built on the native dialog element: focus trap, backdrop, Escape, title, body and footer.FeedbackMoney InputCurrency amount field that groups digits as you type, follows the locale and stores an integer count of minor units.InputsMonth PickerPick a month, a quarter, a half-year or a year: billing periods, fiscal reports and card expiry.InputsMonth PlannerMonth calendar that draws events and trips as bars across the days they cover.PlanningNavigation MenuSite navigation bar whose triggers open panels of links below the header.NavigationNotepadA rich-text notepad that looks like paper: handwriting on ruled lines, a formatting toolbar over the selection, checklists and tear-off pages.PlanningNotification CenterAn inbox panel of notifications grouped by day, with read and unread states and mark all as read.FeedbackNumber InputForm-associated numeric input with native validation, step controls, adornments and helper states.InputsOrder BookLive bids and asks with depth bars, price grouping and a spread row, for a trading screen.Data displayOrg ChartA hierarchy drawn as connected cards that collapse and expand: an organization chart, a reporting line or a team structure.Data displayOTP InputForm-associated one-time-code field with one cell per character, paste and SMS autofill, grouping and masking.InputsOverflow ListOne row of actions or links that shows what fits and folds the rest into a "More" menu, refitting as its width changes.LayoutOverlap chartA Venn diagram of two or three sets, where each circle is a set and each shared area counts the members of exactly that combination.ChartOverlayAnchored popup built on the browser Popover API, positioned with floating-ui.FeedbackPage EditorA Notion-style editor for long text: Markdown shortcuts while you type, a / menu for blocks, a toolbar over selected text, code blocks with syntax colours and eight named colours.Editors & viewersPage HeaderThe top of a page: breadcrumb or parent link, your heading with status badges, description, metadata, page actions that fold into a menu, tabs and a toolbar.LayoutPaginationPage navigation in three layouts: numbered pages, a simple page status, or a table-footer row with rows-per-page.NavigationPan ZoomA viewport that pans and zooms its content: an image, an SVG diagram, a floor plan or a board.Editors & viewersPassword FieldA password input with a show/hide toggle, a strength meter, a requirements checklist and a Caps Lock warning.InputsPayment CardA company card face that stays masked until the reader asks, then shows each detail with a copy button.Data displayPhone InputA phone number field with a searchable country picker, as-you-type grouping and an E.164 value.InputsPie chartA pie or donut chart drawn by ECharts, where one row is one slice and label-field names it.ChartPivot tableSummarises flat rows by the fields set on rows and columns, with subtotals, totals, sorting, a heatmap and a field list.Data displayPopconfirmA small "Are you sure?" popup anchored to the button that asked for it.FeedbackProgressProgress bar or ring, indeterminate or filling to a value, with an optional label and count.FeedbackPromo Code FieldApply a promo code with checking and refusal states; applied codes stay as removable tokens with their saving.InputsPyramid chartRanked levels of a whole, stacked from a narrow apex to a wide base, where one row is one level.ChartQR CodeGenerate accessible, themeable QR codes locally as crisp SVG graphics.Data displayQuantity PickerSeveral labelled counters behind one summary ("2 adults, 1 child"), with limits per counter and in total.InputsQuery InputA key:value query field whose filters are chips you can switch off or remove, with syntax highlighting and field and value suggestions, as in Datadog, GitHub and Sentry.InputsQuestionnaireA multi-step single- and multiple-choice flow with validation, shortcuts and form submission.InputsQuick time menuA menu of quick times (Later today, Tomorrow, Next week), each showing when it falls, plus a date and time picker for anything else.InputsRadar chartCompare several profiles across the same set of normalized indicators.ChartRadial bar chartConcentric rings, each filling toward its own goal: activity rings, a readiness score, a budget per category.ChartRadioRadio options built on native inputs, grouped into one value with keyboard navigation.InputsRateAccessible star rating input with hover preview, keyboard control and optional half values.InputsReaction BarEmoji reactions with counts under a message or comment, toggled by the current user, with a picker to add more.ChatRecurrence EditorEdits how something repeats: every N days, weeks, months or years, weekdays, the third Tuesday, an end; reads and writes RRULE or cron.InputsRelative TimeTime relative to now, such as "3 minutes ago" or "in 2 days", that keeps itself current and shows the full date on hover.Data displayReorder ListReorder a vertical queue with pointer or keyboard input while the application owns persistence.Data displayRich Text EditorA compact formatted-text field for comments, replies and email bodies: bold, links, lists, quotes and code, a one-tab-stop toolbar, and a Markdown value.InputsSankey chartQuantities moving through stages, where one row is one flow and each band is as wide as what it carries.ChartSave BarA floating bar that appears while a form has unsaved changes, with Discard and Save.LayoutScatter chartAn ECharts scatter plot for finding relationships, clusters and outliers across two numeric measures.ChartSchedulerResource timeline: people, rooms or machines down the side, time across the top, each booking a bar you can drag.PlanningScroll AreaA scroll container with themed scrollbars and shadows on the edges with more content beyond them.LayoutScroll ProgressHow far the reader got: a bar that fills or a ring that closes as the page or a container scrolls.FeedbackSearch FieldA search box with a debounced search event, a clear button, a keyboard shortcut hint and recent searches.InputsSecret FieldShows an API key or other secret masked, with buttons to reveal it, copy it and ask for a new one.InputsSelectDropdown that pairs a themeable trigger with an anchored list of c2-list-item options.InputsSelection ToolbarA toolbar that appears over the text a reader selects: Ask AI, Comment, Bold, or any action the app slots in.Editors & viewersSeparatorHorizontal or vertical rule with an optional label, for dividing content and toolbars.LayoutShare SheetShare a link anywhere: copy it, send it to email or a network, scan it as a QR code, or hand it to the device’s own share sheet.FeedbackSheetDialog pinned to an edge of the screen, for content that complements the page rather than interrupting it.FeedbackShortcutKeyboard shortcuts for a whole application from one element: each binding fires an action event, runs a handler or activates a target.InputsSide NavResponsive navigation drawer beside the page: pushes the content on large screens, slides over it with a backdrop on small ones.NavigationSignature PadA box to sign in with a mouse, a pen or a finger, with undo and clear, that exports the signature as SVG or an image.InputsSkeletonPlaceholder block standing in for content that has not arrived, in three shapes and three animations.FeedbackSkip LinkA "Skip to main content" link that appears when a keyboard user tabs onto it and moves focus into the main content.NavigationSliderRange input with a themeable track, thumb, step ticks and value bubble.InputsSparklineA chromeless trend line sized for a table cell, a list row or the trend slot of a c2-stat.ChartSpinnerCircular progress indicator, indeterminate or showing a value, with optional text.FeedbackSplit ButtonA main action with a caret menu of alternatives, such as "Send ▾", or a remembered choice like a merge method.ButtonsSplit PanelTwo panels separated by a divider the user drags, or moves with the keyboard, to resize them.LayoutSpreadsheetA small editable grid with basic formulas, for budgets, quotes, price lists and score sheets.Editors & viewersStatDisplays a KPI with an optional icon, trend and supporting description.Data displayState TimelineOne band per series, coloured by the discrete state it was in over time: service health, CI runs, host 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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