♿️(frontend) keep carousel nav buttons focusable at first and last slide

use aria-disabled  to prevent focus loss when reaching slide limits

CHANGELOG.md

@@ -25,6 +25,7 @@ and this project adheres to
 - ♿️(frontend) fix focus ring on tab container components #1012
 - ♿️(frontend) upgrade join meeting modal accessibility #1027
 - ⬆️(python) bump minimal required python version to 3.13 #1033
+- ♿️(frontend) improve accessibility of the IntroSlider carousel #1026
 
 ### Fixed
 

src/frontend/src/features/home/components/IntroSlider.tsx

@@ -2,8 +2,9 @@ import { styled } from '@/styled-system/jsx'
 import { css } from '@/styled-system/css'
 import { Button } from '@/primitives'
 import { RiArrowLeftSLine, RiArrowRightSLine } from '@remixicon/react'
-import { useRef, useState } from 'react'
+import { useState } from 'react'
 import { useTranslation } from 'react-i18next'
+import { useScreenReaderAnnounce } from '@/hooks/useScreenReaderAnnounce'
 
 const Heading = styled('h2', {
   base: {
@@ -144,6 +145,21 @@ type Slide = {
   isAvailableInBeta?: boolean
 }
 
+const carouselNavButton = css({
+  _focusVisible: {
+    outline: '2px solid var(--colors-focus-ring) !important',
+    outlineOffset: '1px',
+  },
+  _disabled: {
+    color: 'greyscale.400',
+    cursor: 'default',
+    pointerEvents: 'none',
+    _pressed: {
+      backgroundColor: 'transparent',
+    },
+  },
+})
+
 // todo - optimize how images are imported
 const SLIDES: Slide[] = [
   {
@@ -162,30 +178,39 @@ const SLIDES: Slide[] = [
 
 export const IntroSlider = () => {
   const [slideIndex, setSlideIndex] = useState(0)
-  const prevButtonRef = useRef<HTMLButtonElement>(null)
-  const nextButtonRef = useRef<HTMLButtonElement>(null)
-  const focusTargetRef = useRef<'prev' | 'next' | null>(null)
   const { t } = useTranslation('home', { keyPrefix: 'introSlider' })
+  const announce = useScreenReaderAnnounce()
 
   const NUMBER_SLIDES = SLIDES.length
 
-  const prevSlideIndex = slideIndex - 1
-  const nextSlideIndex = slideIndex + 1
+  const goPrev = () => {
+    if (slideIndex === 0) return
+    const newIndex = slideIndex - 1
+    setSlideIndex(newIndex)
+    announce(
+      t('slidePosition', { current: newIndex + 1, total: NUMBER_SLIDES }),
+      'polite',
+      'global'
+    )
+  }
 
-  const previousAriaLabel =
-    slideIndex > 0
-      ? t('previous.withPosition', {
-          target: prevSlideIndex + 1,
+  const goNext = () => {
+    if (slideIndex === NUMBER_SLIDES - 1) return
+    const newIndex = slideIndex + 1
+    setSlideIndex(newIndex)
+    announce(
+      t('slidePosition', { current: newIndex + 1, total: NUMBER_SLIDES }),
+      'polite',
+      'global'
+    )
+  }
+
+  const ariaLabelParams = {
+    current: slideIndex + 1,
     total: NUMBER_SLIDES,
-        })
-      : t('previous.label')
-  const nextAriaLabel =
-    slideIndex < NUMBER_SLIDES - 1
-      ? t('next.withPosition', {
-          target: nextSlideIndex + 1,
-          total: NUMBER_SLIDES,
-        })
-      : t('next.label')
+  }
+  const previousAriaLabel = t('previous.labelWithPosition', ariaLabelParams)
+  const nextAriaLabel = t('next.labelWithPosition', ariaLabelParams)
 
   return (
     <Container
@@ -203,16 +228,12 @@ export const IntroSlider = () => {
         <ButtonContainer>
           <ButtonVerticalCenter>
             <Button
-              ref={prevButtonRef}
               variant="secondaryText"
               square
-              className="carousel-nav-button"
+              className={carouselNavButton}
               aria-label={previousAriaLabel}
-              onPress={() => {
-                focusTargetRef.current = 'prev'
-                setSlideIndex(prevSlideIndex)
-              }}
-              isDisabled={slideIndex == 0}
+              aria-disabled={slideIndex === 0}
+              onPress={goPrev}
             >
               <RiArrowLeftSLine />
             </Button>
@@ -220,7 +241,11 @@ export const IntroSlider = () => {
         </ButtonContainer>
         <SlideContainer>
           {SLIDES.map((slide, index) => (
-            <Slide visible={index == slideIndex} key={index}>
+            <Slide
+              aria-hidden={index !== slideIndex}
+              visible={index === slideIndex}
+              key={index}
+            >
               <Image src={slide.src} alt="" role="presentation" />
               <TextAnimation visible={index == slideIndex}>
                 <Heading>{t(`${slide.key}.title`)}</Heading>
@@ -232,16 +257,12 @@ export const IntroSlider = () => {
         <ButtonContainer>
           <ButtonVerticalCenter>
             <Button
-              ref={nextButtonRef}
               variant="secondaryText"
               square
-              className="carousel-nav-button"
+              className={carouselNavButton}
               aria-label={nextAriaLabel}
-              onPress={() => {
-                focusTargetRef.current = 'next'
-                setSlideIndex(nextSlideIndex)
-              }}
-              isDisabled={slideIndex == NUMBER_SLIDES - 1}
+              aria-disabled={slideIndex === NUMBER_SLIDES - 1}
+              onPress={goNext}
             >
               <RiArrowRightSLine />
             </Button>
@@ -252,18 +273,8 @@ export const IntroSlider = () => {
         className={css({
           marginTop: '0.5rem',
           display: { base: 'none', xsm: 'block' },
-
         })}
-        role="status"
-        aria-live="polite"
-        aria-atomic="true"
       >
-        <span className="sr-only">
-          {t('slidePosition', {
-            current: slideIndex + 1,
-            total: NUMBER_SLIDES,
-          })}
-        </span>
         {SLIDES.map((_, index) => (
           <Dot key={index} selected={index == slideIndex} />
         ))}

src/frontend/src/locales/de/home.json

@@ -32,12 +32,12 @@
   "introSlider": {
     "previous": {
       "label": "Vorherige Folie",
-      "withPosition": "Vorherige Folie anzeigen ({{target}} von {{total}})",
+      "labelWithPosition": "Vorherige Folie ({{current}} von {{total}})",
       "tooltip": "Vorherige Folie"
     },
     "next": {
       "label": "Nächste Folie",
-      "withPosition": "Nächste Folie anzeigen ({{target}} von {{total}})",
+      "labelWithPosition": "Nächste Folie ({{current}} von {{total}})",
       "tooltip": "Nächste Folie"
     },
     "beta": {

src/frontend/src/locales/en/home.json

@@ -32,12 +32,12 @@
   "introSlider": {
     "previous": {
       "label": "Previous slide",
-      "withPosition": "Go to previous slide ({{target}} of {{total}})",
+      "labelWithPosition": "Previous slide ({{current}} of {{total}})",
       "tooltip": "Previous slide"
     },
     "next": {
       "label": "Next slide",
-      "withPosition": "Go to next slide ({{target}} of {{total}})",
+      "labelWithPosition": "Next slide ({{current}} of {{total}})",
       "tooltip": "Next slide"
     },
     "beta": {

src/frontend/src/locales/fr/home.json

@@ -33,12 +33,12 @@
     "carouselLabel": "Diaporama de présentation",
     "previous": {
       "label": "Diapositive précédente",
-      "withPosition": "Afficher la diapositive précédente ({{target}} sur {{total}})",
+      "labelWithPosition": "Diapositive précédente ({{current}} sur {{total}})",
       "tooltip": "Diapositive précédente"
     },
     "next": {
       "label": "Diapositive suivante",
-      "withPosition": "Afficher la diapositive suivante ({{target}} sur {{total}})",
+      "labelWithPosition": "Diapositive suivante ({{current}} sur {{total}})",
       "tooltip": "Diapositive suivante"
     },
     "slidePosition": "Diapositive {{current}} sur {{total}}",

src/frontend/src/locales/nl/home.json

@@ -32,12 +32,12 @@
   "introSlider": {
     "previous": {
       "label": "Vorige dia",
-      "withPosition": "Vorige dia tonen ({{target}} van {{total}})",
+      "labelWithPosition": "Vorige dia ({{current}} van {{total}})",
       "tooltip": "Vorige dia"
     },
     "next": {
       "label": "Volgende dia",
-      "withPosition": "Volgende dia tonen ({{target}} van {{total}})",
+      "labelWithPosition": "Volgende dia ({{current}} van {{total}})",
       "tooltip": "Volgende dia"
     },
     "beta": {

src/frontend/src/styles/index.css

@@ -30,13 +30,6 @@ body,
   outline-offset: 1px;
 }
 
-/* Fallback for NVDA / screen readers: ensure focus ring on :focus when
-   focus-visible detection fails (e.g. carousel nav buttons) */
-.carousel-nav-button:focus {
-  outline: 2px solid var(--colors-focus-ring) !important;
-  outline-offset: 1px;
-}
-
 @media (prefers-reduced-motion: reduce) {
   * {
     animation: none !important;