InfiniteMarqueeNoPause [anti-pattern] v1.0.0

An infinite CSS marquee/ticker strip with no pause-on-hover, no pause-on-focus, and no prefers-reduced-motion stop — fails WCAG 2.1 criterion 2.2.2 (Pause, Stop, Hide) for any animation lasting more than 5 seconds.

Meta

• License: Apache-2.0
• License Provenance: package-authorship-claim

What

Horizontally scrolling logo strips, social proof tickers, or news feeds implemented as animation: marquee linear infinite that run forever with no user control.

Wcag Violation

WCAG 2.1 SC 2.2.2 Pause, Stop, Hide (Level A): Any moving content that starts automatically, lasts more than 5 seconds, and is presented alongside other content must have a mechanism to pause, stop, or hide it.

Why Bad

• Constant peripheral motion disrupts reading of adjacent content — the eye is drawn to motion involuntarily.
• Screen readers encounter a stream of duplicate content as logos/items loop.
• Users with cognitive disabilities, ADHD, or vestibular disorders are specifically harmed by continuous horizontal scroll.
• prefers-reduced-motion violation when animation is not stopped.
• Touch devices: the infinite animation prevents touch-scroll when the strip captures touch events.

Fix

Add animation-play-state: paused on :hover and :focus-within. Add @media (prefers-reduced-motion: reduce) { animation: none }. Provide a visible pause button for WCAG compliance.

Wrong

    /* Wrong: no pause, no reduced-motion stop */
    .marquee-track {
      animation: scroll-left 20s linear infinite;
    }
    @keyframes scroll-left {
      from { transform: translateX(0); }
      to   { transform: translateX(-50%); }
    }
  

Correct

    /* Correct: pause on hover/focus, stop on reduced motion */
    .marquee-track {
      animation: scroll-left 20s linear infinite;
    }
    .marquee-track:hover,
    .marquee-wrapper:focus-within .marquee-track {
      animation-play-state: paused;
    }
    @keyframes scroll-left {
      from { transform: translateX(0); }
      to   { transform: translateX(-50%); }
    }
    @media (prefers-reduced-motion: reduce) {
      .marquee-track { animation: none; }
    }

    /* Pause button (WCAG 2.2.2 compliant) */
    /*
    <button class="marquee-pause" aria-label="Pause scrolling logos"
            aria-pressed="false">⏸</button>
    */
  

InfiniteMarqueeNoPause [anti-pattern] v1.0.0

An infinite CSS marquee/ticker strip with no pause-on-hover, no pause-on-focus, and no prefers-reduced-motion stop — fails WCAG 2.1 criterion 2.2.2 (Pause, Stop, Hide) for any animation lasting more than 5 seconds.

Meta

• License: Apache-2.0
• License Provenance: package-authorship-claim

What

Horizontally scrolling logo strips, social proof tickers, or news feeds implemented as animation: marquee linear infinite that run forever with no user control.

Wcag Violation

WCAG 2.1 SC 2.2.2 Pause, Stop, Hide (Level A): Any moving content that starts automatically, lasts more than 5 seconds, and is presented alongside other content must have a mechanism to pause, stop, or hide it.

Why Bad

• Constant peripheral motion disrupts reading of adjacent content — the eye is drawn to motion involuntarily.
• Screen readers encounter a stream of duplicate content as logos/items loop.
• Users with cognitive disabilities, ADHD, or vestibular disorders are specifically harmed by continuous horizontal scroll.
• prefers-reduced-motion violation when animation is not stopped.
• Touch devices: the infinite animation prevents touch-scroll when the strip captures touch events.

Fix

Add animation-play-state: paused on :hover and :focus-within. Add @media (prefers-reduced-motion: reduce) { animation: none }. Provide a visible pause button for WCAG compliance.

Wrong

    /* Wrong: no pause, no reduced-motion stop */
    .marquee-track {
      animation: scroll-left 20s linear infinite;
    }
    @keyframes scroll-left {
      from { transform: translateX(0); }
      to   { transform: translateX(-50%); }
    }
  

Correct

    /* Correct: pause on hover/focus, stop on reduced motion */
    .marquee-track {
      animation: scroll-left 20s linear infinite;
    }
    .marquee-track:hover,
    .marquee-wrapper:focus-within .marquee-track {
      animation-play-state: paused;
    }
    @keyframes scroll-left {
      from { transform: translateX(0); }
      to   { transform: translateX(-50%); }
    }
    @media (prefers-reduced-motion: reduce) {
      .marquee-track { animation: none; }
    }

    /* Pause button (WCAG 2.2.2 compliant) */
    /*
    <button class="marquee-pause" aria-label="Pause scrolling logos"
            aria-pressed="false">⏸</button>
    */
  

Relations

related: [@community/constraint-animation-pref-respected, @community/rule-reduced-motion-required, @community/anti-pattern-decorative-spinning, @community/fact-animation-distraction-cost]

Meta

• License: Apache-2.0
• License Provenance: package-authorship-claim

What

Horizontally scrolling logo strips, social proof tickers, or news feeds implemented as animation: marquee linear infinite that run forever with no user control.

Wcag Violation

WCAG 2.1 SC 2.2.2 Pause, Stop, Hide (Level A): Any moving content that starts automatically, lasts more than 5 seconds, and is presented alongside other content must have a mechanism to pause, stop, or hide it.

Why Bad

• Constant peripheral motion disrupts reading of adjacent content — the eye is drawn to motion involuntarily.
• Screen readers encounter a stream of duplicate content as logos/items loop.
• Users with cognitive disabilities, ADHD, or vestibular disorders are specifically harmed by continuous horizontal scroll.
• prefers-reduced-motion violation when animation is not stopped.
• Touch devices: the infinite animation prevents touch-scroll when the strip captures touch events.

Fix

Add animation-play-state: paused on :hover and :focus-within. Add @media (prefers-reduced-motion: reduce) { animation: none }. Provide a visible pause button for WCAG compliance.

Wrong

    /* Wrong: no pause, no reduced-motion stop */
    .marquee-track {
      animation: scroll-left 20s linear infinite;
    }
    @keyframes scroll-left {
      from { transform: translateX(0); }
      to   { transform: translateX(-50%); }
    }
  

Correct

    /* Correct: pause on hover/focus, stop on reduced motion */
    .marquee-track {
      animation: scroll-left 20s linear infinite;
    }
    .marquee-track:hover,
    .marquee-wrapper:focus-within .marquee-track {
      animation-play-state: paused;
    }
    @keyframes scroll-left {
      from { transform: translateX(0); }
      to   { transform: translateX(-50%); }
    }
    @media (prefers-reduced-motion: reduce) {
      .marquee-track { animation: none; }
    }

    /* Pause button (WCAG 2.2.2 compliant) */
    /*
    <button class="marquee-pause" aria-label="Pause scrolling logos"
            aria-pressed="false">⏸</button>
    */