v0.9.4defuss-shadcn
Theme

defuss-shadcn / Website / News / news-ticker

Built with: CSS

News TickerBLK

Displays a compact stream of linked news headlines - a seamless CSS marquee that pauses on hover and focus, and stops for reduced motion. Part of the News blocks.

On this page (7)
Component Skill — components/news-ticker/component-skill.md

Native basis

A labelled <section> with one list of headline links - repeated once in the same track, inert and aria-hidden, so the loop is seamless while assistive tech and the tab order see each headline once. A CSS animation slides the track; hover and focus pause it.

Built from

Badge.

Web Platform APIs

CSS animationsinert:focus-withinmask-imageprefers-reduced-motion

Classes

.mk-news-ticker.mk-news-ticker-label.mk-news-ticker-viewport.mk-news-ticker-track.mk-news-ticker-items.mk-news-ticker-trend

Data attributes

data-variant (breaking, static), data-size="sm"; --mk-news-ticker-duration (default 40s); data-variant (market, inverse, pill); .mk-news-ticker-trend[data-trend="up|down"].

§Default

Hover or focus a headline and the strip pauses. The list runs twice in the track - the copy is inert and aria-hidden, so each headline is read and tabbed once.

§Breaking

data-variant='breaking': a red label with a pulsing dot. --mk-news-ticker-duration sets the speed (here 25s).

§Static and small

data-variant='static': no motion, the row scrolls by hand - what everyone gets under prefers-reduced-motion. data-size='sm' slims the strip.

§Market

data-variant='market': symbols, prices and changes in mono - .mk-news-ticker-trend with data-trend='up' / 'down' draws the arrow and the colour.

§Inverse with badges

data-variant='inverse': a dark band. Each headline can lead with a Badge for its desk.

§Pill

data-variant='pill': a rounded, floating strip - announcements above a landing page.

§CSS view file

/* -- News Ticker (website) ------------------------------------------
   A compact stream of linked headlines. The list runs twice in one track
   (the copy is inert + aria-hidden) and the track slides by half its width,
   so the loop is seamless - pure CSS. Hover or focus pauses it; under
   reduced motion it stops and the row scrolls by hand instead. */
@layer components {
  .mk-news-ticker {
    --_duration: var(--mk-news-ticker-duration, 40s);
    display: flex;
    align-items: stretch;
    box-sizing: border-box;
    width: 100%;
    min-width: 0;
    overflow: hidden;
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    background: var(--card);
    color: var(--card-foreground);
    font-size: 0.875rem;
  }
  .mk-news-ticker-label {
    display: inline-flex;
    flex: none;
    align-items: center;
    gap: 0.375rem;
    padding-inline: 0.875rem;
    background: var(--primary);
    color: var(--primary-foreground);
    font-size: 0.75rem;
    font-weight: 700;
    letter-spacing: 0.06em;
    text-transform: uppercase;
  }
  .mk-news-ticker-viewport {
    flex: 1;
    min-width: 0;
    overflow: hidden;
    mask-image: linear-gradient(to right, transparent, #000 1.5rem, #000 calc(100% - 1.5rem), transparent);
  }
  .mk-news-ticker-track {
    display: flex;
    width: max-content;
    animation: mk-news-ticker-scroll var(--_duration) linear infinite;
  }
  .mk-news-ticker:is(:hover, :focus-within) .mk-news-ticker-track { animation-play-state: paused; }
  .mk-news-ticker-items {
    display: flex;
    flex: none;
    margin: 0;
    padding: 0;
    list-style: none;
    & li {
      display: flex;
      align-items: center;
      /* a separator dot between headlines (and after the last, for the loop) */
      &::after {
        content: "";
        width: 0.25rem;
        height: 0.25rem;
        border-radius: 50%;
        background: var(--muted-foreground);
        opacity: 0.6;
      }
    }
    & a {
      display: inline-flex;
      align-items: baseline;
      gap: 0.5rem;
      padding: 0.625rem 1.25rem;
      color: inherit;
      font-weight: 500;
      text-decoration: none;
      white-space: nowrap;
      &:hover { text-decoration: underline; text-underline-offset: 0.2em; }
      &:focus-visible { outline: 2px solid var(--ring); outline-offset: -2px; border-radius: var(--radius-sm); }
    }
    & time {
      color: var(--muted-foreground);
      font-size: 0.75rem;
      font-variant-numeric: tabular-nums;
    }
  }
  /* breaking: a red label with a pulsing dot */
  .mk-news-ticker[data-variant="breaking"] {
    border-color: oklch(0.58 0.22 27 / 0.45);
    & .mk-news-ticker-label {
      background: oklch(0.58 0.22 27);
      color: #fff;
      &::before {
        content: "";
        width: 0.5rem;
        height: 0.5rem;
        border-radius: 50%;
        background: currentColor;
        animation: mk-news-ticker-pulse 1.6s ease-in-out infinite;
      }
    }
  }
  /* static: no motion at all - the row scrolls by hand */
  .mk-news-ticker[data-variant="static"],
  .mk-news-ticker[data-variant="static"] .mk-news-ticker-viewport { mask-image: none; }
  .mk-news-ticker[data-variant="static"] {
    & .mk-news-ticker-viewport { overflow-x: auto; overscroll-behavior-inline: contain; scrollbar-width: thin; }
    & .mk-news-ticker-track { animation: none; }
    & .mk-news-ticker-items[aria-hidden="true"] { display: none; }
  }
  /* a change readout (market, scores): green up, red down */
  .mk-news-ticker-trend {
    display: inline-flex;
    align-items: center;
    gap: 0.125rem;
    font-size: 0.75rem;
    font-weight: 600;
    font-variant-numeric: tabular-nums;
    &[data-trend="up"] { color: oklch(0.6 0.16 150); &::before { content: "▲"; font-size: 0.625em; } }
    &[data-trend="down"] { color: oklch(0.6 0.2 27); &::before { content: "▼"; font-size: 0.625em; } }
  }
  /* market: a stock strip - symbol, price, change; mono numbers */
  .mk-news-ticker[data-variant="market"] {
    & .mk-news-ticker-label { background: var(--foreground); color: var(--background); }
    & .mk-news-ticker-items a { gap: 0.625rem; font-family: var(--font-mono); font-size: 0.8125rem; }
    & .mk-news-ticker-items b { font-weight: 700; letter-spacing: 0.02em; }
  }
  /* inverse: a dark band */
  .mk-news-ticker[data-variant="inverse"] {
    border-color: transparent;
    background: var(--foreground);
    color: var(--background);
    & .mk-news-ticker-label { background: var(--primary); color: var(--primary-foreground); box-shadow: 0.75rem 0 1rem -0.5rem rgb(0 0 0 / 0.5); }
    & .mk-news-ticker-items time { color: color-mix(in oklch, var(--background) 65%, transparent); }
    & .mk-news-ticker-items li::after { background: var(--background); }
  }
  /* pill: a rounded floating strip with a badge label */
  .mk-news-ticker[data-variant="pill"] {
    padding: 0.25rem;
    border-radius: 999px;
    box-shadow: var(--shadow-md);
    & .mk-news-ticker-label { border-radius: 999px; padding-block: 0.25rem; }
    & .mk-news-ticker-items a { padding-block: 0.375rem; }
  }
  /* sizes */
  .mk-news-ticker[data-size="sm"] {
    font-size: 0.8125rem;
    & .mk-news-ticker-items a { padding-block: 0.375rem; }
    & .mk-news-ticker-label { padding-inline: 0.625rem; font-size: 0.6875rem; }
  }
  @keyframes mk-news-ticker-scroll {
    to { translate: -50% 0; }
  }
  @keyframes mk-news-ticker-pulse {
    50% { opacity: 0.3; }
  }
  /* -- Accessibility ------------------------------------------- */
  @media (prefers-reduced-motion: reduce) {
    .mk-news-ticker {
      & .mk-news-ticker-viewport { overflow-x: auto; mask-image: none; }
      & .mk-news-ticker-track { animation: none; }
      & .mk-news-ticker-items[aria-hidden="true"] { display: none; }
      & .mk-news-ticker-label::before { animation: none; }
    }
  }
  @media (prefers-contrast: more) {
    .mk-news-ticker { border-color: var(--foreground); }
    .mk-news-ticker-items time { color: var(--foreground); }
  }
  @media (forced-colors: active) {
    .mk-news-ticker-label { forced-color-adjust: none; background: Highlight; color: HighlightText; }
    .mk-news-ticker-items a { color: LinkText; }
  }
}

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