c2n/web-componentsv1.0.18
OverviewGetting startedComponentsIconsGuidesExamples
OverviewGetting startedComponentsIconsGuidesExamples
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Hover Card

Interactive preview card shown when a link or mention is hovered or focused, rendered in the top layer.

Attributes

NameTypeDefaultDescription
placementPlacementbottomPreferred side of the trigger; flips when there is no room.
open-delaynumber700Delay before opening, in milliseconds.
close-delaynumber300Delay before closing once the pointer or focus has left, in milliseconds.
disabledbooleanfalseKeeps the card from opening on hover or focus; open still works.
openbooleanfalseVisible state. Set it to open or close the card programmatically.

Slots

NameDescription
triggerThe element that opens the card, typically a link or a mention.
(default)Card content.

Events

NameTypeDescription
showEventFired when the card opens.
hideEventFired when the card closes.

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-hover-card
--c2-hover-card--background-colorbackground-color#ffffff
--c2-hover-card--colorcolor#18181b
--c2-hover-card--borderborder1px solid #e4e4e7
--c2-hover-card--border-radiusborder-radius8px
--c2-hover-card--box-shadowbox-shadow0 8px 24px rgba(24, 24, 27, 0.08)
--c2-hover-card--font-sizefont-size14px
--c2-hover-card--font-familyfont-family—
--c2-hover-card--line-heightline-height1.5
--c2-hover-card--padding-toppadding16px
--c2-hover-card--padding-rightpadding16px
--c2-hover-card--padding-bottompadding16px
--c2-hover-card--padding-leftpadding16px
--c2-hover-card--widthpixel320px
--c2-hover-card--offsetpixel8pxDistance between the trigger and the card.
--c2-hover-card--transition-durationtime150ms
--c2-hover-card--enter-transformtransformscale(0.96)Start of the enter animation.
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month, or a year: billing periods, 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.InputsOrg 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.NavigationPassword FieldA password input with a show/hide toggle, a strength meter, a requirements checklist and a Caps Lock warning.InputsPhone 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.ChartPopconfirmA 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.FeedbackPyramid 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 displayQuery 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.InputsRadar chartCompare several profiles across the same set of normalized indicators.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.ChatRelative 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.ChartSearch 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.InputsSeparatorHorizontal or vertical rule with an optional label, for dividing content and toolbars.LayoutSheetDialog 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.NavigationSkeletonPlaceholder 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.ChatSwipe 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.InputsText 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 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.InputsView 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.PlanningWorking 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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