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feat: optimize Banner Performance with Lazy Loading #3351

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feat: optimize Banner Performance with Lazy Loading #3351

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caaf607
feat : optimize Banner Performance with Lazy Loading
Manancode Oct 30, 2024
98e6c72
fixing lint
Manancode Oct 30, 2024
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43 changes: 26 additions & 17 deletions components/campaigns/AnnouncementHero.tsx
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Original file line number Diff line number Diff line change
Expand Up @@ -54,29 +54,38 @@ export default function AnnouncementHero({ className = '', small = false }: IAnn
{numberOfVisibleBanners > 1 && (
<div
className={`absolute left-0 top-1/2 z-10 mb-2 flex size-8 -translate-y-1/2 cursor-pointer
items-center justify-center rounded-full bg-primary-500 opacity-50 hover:bg-primary-600 md:opacity-100`}
items-center justify-center rounded-full bg-primary-500 opacity-50 hover:bg-primary-600 md:opacity-100`}
onClick={goToPrevious}
>
<ArrowLeft className='w-4 text-white' />
</div>
)}
<div className='relative flex w-5/6 flex-col items-center justify-center gap-2'>
<div className='relative flex min-h-72 w-full items-center justify-center overflow-hidden lg:h-[17rem] lg:w-[38rem]'>
{visibleBanners.map((banner, index) => (
<Banner
key={index}
title={banner.title}
dateLocation={banner.dateLocation}
cfaText={banner.cfaText}
eventName={banner.eventName}
cfpDeadline={banner.cfpDeadline}
link={banner.link}
city={banner.city}
activeBanner={index === activeIndex % numberOfVisibleBanners}
className={className}
small={small}
/>
))}
{visibleBanners.map((banner, index) => {
// Only render active banner and immediate neighbors
const isVisible = Math.abs(index - (activeIndex % numberOfVisibleBanners)) <= 1;

if (!isVisible) {
return null;
}

return (
<Banner
key={index}
title={banner.title}
dateLocation={banner.dateLocation}
cfaText={banner.cfaText}
eventName={banner.eventName}
cfpDeadline={banner.cfpDeadline}
link={banner.link}
city={banner.city}
activeBanner={index === activeIndex % numberOfVisibleBanners}
className={className}
small={small}
/>
);
})}
</div>
<div className='m-auto flex justify-center'>
{visibleBanners.map((banner, index) => (
Expand All @@ -93,7 +102,7 @@ export default function AnnouncementHero({ className = '', small = false }: IAnn
{numberOfVisibleBanners > 1 && (
<div
className={`absolute right-0 top-1/2 z-10 mb-2 size-8 -translate-y-1/2 cursor-pointer
rounded-full bg-primary-500 opacity-50 hover:bg-primary-600 md:opacity-100`}
rounded-full bg-primary-500 opacity-50 hover:bg-primary-600 md:opacity-100`}
onClick={goToNext}
>
<ArrowRight className='text-white' />
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