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astro-site-cerveau/src/components/astro/MobileTabBar.astro

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---
// MobileTabBar - indicateur de colonne active sur mobile (V1.1-D.1)
// Ecoute l'event "swipe-position-change" emis par SwipeContainer.vue
// Affiche : Journal | Carte | Insta - colonne active surlignee
---
<nav
id="mobile-tab-bar"
aria-label="Navigation colonnes"
class="fixed top-12 left-0 right-0 z-30 h-11 bg-white border-b border-neutral-200 flex items-stretch justify-around md:hidden"
>
<button
type="button"
data-tab-index="0"
class="mobile-tab flex-1 text-sm px-2 border-b-2 transition-colors"
aria-label="Aller au journal"
>
Journal
</button>
<button
type="button"
data-tab-index="1"
class="mobile-tab flex-1 text-sm px-2 border-b-2 transition-colors"
aria-label="Aller à la carte"
>
Carte
</button>
<button
type="button"
data-tab-index="2"
class="mobile-tab flex-1 text-sm px-2 border-b-2 transition-colors"
aria-label="Aller à Instagram"
>
Insta
</button>
</nav>
<script>
const tabs = document.querySelectorAll<HTMLButtonElement>('.mobile-tab');
function setActive(pos: number) {
tabs.forEach((tab, i) => {
const active = i === pos;
tab.classList.toggle('text-neutral-900', active);
tab.classList.toggle('font-medium', active);
tab.classList.toggle('border-neutral-900', active);
tab.classList.toggle('text-neutral-400', !active);
tab.classList.toggle('border-transparent', !active);
});
}
// Etat initial depuis sessionStorage (cle utilisee par SwipeContainer.vue)
const saved = sessionStorage.getItem('pc-position');
const initial = saved !== null && !Number.isNaN(Number(saved)) ? Number(saved) : 1;
setActive(initial);
// Ecoute les changements de position emis par SwipeContainer.vue
document.addEventListener('swipe-position-change', (e: Event) => {
const detail = (e as CustomEvent<{ pos: number }>).detail;
if (detail && typeof detail.pos === 'number') {
setActive(detail.pos);
}
});
// Les boutons de la tab bar declenchent un scroll via un event custom
tabs.forEach((tab) => {
tab.addEventListener('click', () => {
const idx = Number(tab.dataset.tabIndex);
document.dispatchEvent(new CustomEvent('mobile-tab-scroll', { detail: { pos: idx } }));
});
});
</script>