c2n/web-componentsv1.0.18
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OverviewGetting startedComponentsIconsGuidesExamples
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Month Picker

Pick a month, or a year: billing periods, reports and card expiry.

Attributes

NameTypeDefaultDescription
valuestring—The month picked, as YYYY-MM, or the year as YYYY with granularity="year".
granularity'month' | 'year'monthPick a month, or only a year.
minstring—The earliest month (or year) that can be picked, in the same format as value.
maxstring—The latest month (or year) that can be picked, in the same format as value.
namestring—Form field name: the form receives the value under it.
requiredbooleanfalseAsks for a value before the form submits.
disabledbooleanfalseTurns the picker off; the value is kept and, as for a disabled form control, not submitted.
labelstring—The accessible name of the picker. Inside a c2-form-field, the field's label names it.

Events

NameTypeDescription
inputEventFired when the user picks a month (or year), before change. Read value.
changeCustomEvent<{ value: string }>Fired after the user picks a month (or year). Not fired for programmatic changes.

CSS parts

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

NameDescription
headerThe row with the paging buttons and the title.
titleThe title button: the year, or the range of years.
navigationA paging button.
gridThe grid of months or years.
cellA month or a year.

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-month-picker
--c2-month-picker--backgroundcolor#ffffff
--c2-month-picker--colorcolor#18181b
--c2-month-picker--borderborder1px solid #e4e4e7
--c2-month-picker--border-radiusborder-radius14px
--c2-month-picker--box-shadowbox-shadownone
--c2-month-picker--paddingpadding12px
--c2-month-picker--widthpixel264px
--c2-month-picker--font-sizefont-size14px
c2-month-picker > title
--c2-month-picker__title--font-weightfont-weight600
c2-month-picker > navigation
--c2-month-picker__navigation--sizepixel32px
c2-month-picker > navigation > hover
--c2-month-picker__navigation__hover--backgroundcolor#f4f4f5
c2-month-picker > grid
--c2-month-picker__grid--gappixel4px
c2-month-picker > cell
--c2-month-picker__cell--heightpixel40px
--c2-month-picker__cell--border-radiusborder-radius999px
c2-month-picker > cell > hover
--c2-month-picker__cell__hover--backgroundcolor#f4f4f5
c2-month-picker > cell > current
--c2-month-picker__cell__current--colorcolor#0265dcThe current month (or year).
--c2-month-picker__cell__current--font-weightfont-weight600
c2-month-picker > cell > selected
--c2-month-picker__cell__selected--backgroundcolor#0265dc
--c2-month-picker__cell__selected--colorcolor#ffffff
c2-month-picker > cell > disabled
--c2-month-picker__cell__disabled--opacityopacity0.38
c2-month-picker > focus
--c2-month-picker__focus--outlineoutline2px solid rgba(2, 101, 220, 0.4)
c2-month-picker > error
--c2-month-picker__error--borderborder1px solid #dc2626Shown while an enclosing c2-form-field shows an error.

Text and languages

The text the component shows, in English. It shows another language when the app adds one with addTranslations, under month-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
labelChoose a month—
yearLabelChoose a year—
previousYearPrevious year—
nextYearNext year—
previousYearsPrevious years—
nextYearsNext years—
chooseYear{0}, choose a year{0} year
backToMonthsBack to the months of {0}{0} year
valueMissingPlease choose a month.—
yearMissingPlease choose a year.—
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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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