c2n/web-componentsv1.0.18
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OverviewGetting startedComponentsIconsGuidesExamples
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Notification Center

An inbox panel of notifications grouped by day, with read and unread states and mark all as read.

Attributes

NameTypeDefaultDescription
notificationsNotificationItem[][]The notifications. As an attribute, a JSON array of { id, title, body, time, read, href, avatar, group }.
filter'all' | 'unread'allWhich notifications are listed. The All / Unread buttons set it.
group-by'day' | 'field' | 'none'dayHow the list is grouped: by day (Today, Yesterday, then the date), by each item's group, or not at all.
has-morebooleanfalseAdds a Load more button at the end of the list, which fires load-more.
loadingbooleanfalseMarks the Load more button busy while the next page arrives.
labelstring—The title. Defaults to "Notifications" in the page's language.

Slots

NameDescription
emptyReplaces the message shown when there is nothing to list.
header-actionsMore controls at the end of the header, such as a settings button.

Events

NameTypeDescription
read-changeCustomEvent<{ ids: (string | number)[]; read: boolean }>The user marked items read or unread. Cancelable: cancel it to leave notifications unchanged.
notification-clickCustomEvent<{ notification: NotificationItem }>An item was activated. Cancelable: cancelling it keeps the item unread and stops a link from being followed.
filter-changeCustomEvent<{ filter: 'all' | 'unread' }>The user switched between All and Unread; filter is already updated.
load-moreEventThe Load more button was pressed.

CSS parts

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

NameDescription
headerThe row with the title, the unread count and the actions.
titleThe title.
filtersThe All / Unread buttons.
mark-allThe Mark all as read button.
group-titleA day's (or group's) title.
itemOne notification.
dotThe unread dot.
item-titleAn item's title.
bodyAn item's second line.
timeAn item's time.
toggleAn item's read / unread toggle.
emptyThe message shown when there is nothing to list.
load-moreThe Load more button.

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-notification-center
--c2-notification-center--widthpixel380px
--c2-notification-center--max-heightpixel520pxThe list scrolls past it.
--c2-notification-center--background-colorcolor#ffffff
--c2-notification-center--borderborder1px solid #e4e4e7
--c2-notification-center--border-radiusborder-radius8px
--c2-notification-center--box-shadowshadownone
--c2-notification-center--colorcolor#18181b
--c2-notification-center--font-sizefont-size14px
c2-notification-center > header
--c2-notification-center__header--paddingpadding12px 16px 8px
c2-notification-center > title
--c2-notification-center__title--font-weightfont-weight600
c2-notification-center > group-title
--c2-notification-center__group-title--colorcolor#71717a
--c2-notification-center__group-title--font-sizefont-size12px
c2-notification-center > item
--c2-notification-center__item--paddingpadding10px 16px
--c2-notification-center__item--gappixel12px
c2-notification-center > item > hover
--c2-notification-center__item__hover--background-colorcolor#fafafa
c2-notification-center > item > unread
--c2-notification-center__item__unread--background-colorcolor#edf1feAn unread item's background.
c2-notification-center > dot
--c2-notification-center__dot--colorcolorrgb(2, 101, 220)
--c2-notification-center__dot--sizepixel8px
c2-notification-center > item-title
c2-notification-center > item-title > unread
--c2-notification-center__item-title__unread--font-weightfont-weight600
c2-notification-center > body
--c2-notification-center__body--colorcolor#52525b
--c2-notification-center__body--font-sizefont-size13px
c2-notification-center > time
--c2-notification-center__time--colorcolor#52525b
--c2-notification-center__time--font-sizefont-size12px
c2-notification-center > divider
--c2-notification-center__divider--borderborder1px solid #e4e4e7Between the header and the list, and between the groups.
c2-notification-center > filter
c2-notification-center > filter > selected
--c2-notification-center__filter__selected--background-colorcolor#f4f4f5
c2-notification-center > link
--c2-notification-center__link--colorcolorrgb(2, 101, 220)The Mark all as read and Load more buttons.
c2-notification-center > focus
--c2-notification-center__focus--outlineoutline2px solid rgba(2, 101, 220, 0.4)

Text and languages

The text the component shows, in English. It shows another language when the app adds one with addTranslations, under notification-center, 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
titleNotifications—
filterShow—
allAll—
unreadUnread—
unreadCount{0} unread{0} count
markAllReadMark all as read—
markReadMark as read—
markUnreadMark as unread—
allMarkedAll notifications marked as read—
unreadItemUnread: {0}{0} title
todayToday—
yesterdayYesterday—
emptyNo notifications—
emptyUnreadYou’re all caught up—
loadMoreLoad more—
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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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