Promo Website Development

Promo Website Development

A promo website is a temporary or permanent site for a specific campaign, product, event, or launch. It differs from a corporate site and landing page: it lives within one idea, often has high saturation with interactive elements, non-standard animations, visual storytelling. Examples: new car promotion, game or app page, conference website, FMCG product promotion.

How Promo Differs from Landing

Landing page is conversion-oriented: minimal distractions, maximum path to target action. Promo can convert, but primary goal is engagement, memorability, creating buzz around a product. Animation and visual budget is significantly higher. User staying longer is expected.

Technical Stack

Promo sites are one of the few contexts where heavy JavaScript animation libraries are justified:

GSAP (GreenSock) — standard for scroll-based animations and timeline scenarios. ScrollTrigger plugin allows synchronizing animation with scroll position:

import { gsap } from 'gsap';
import { ScrollTrigger } from 'gsap/ScrollTrigger';

gsap.registerPlugin(ScrollTrigger);

gsap.to('.product-image', {
  y: -100,
  scale: 1.2,
  ease: 'none',
  scrollTrigger: {
    trigger: '.product-section',
    start: 'top center',
    end: 'bottom top',
    scrub: 1.5,
  }
});

Three.js / R3F (React Three Fiber) — for 3D elements. Car promotion, interactive 3D product, particle systems. Requires mobile optimization: LOD (levels of detail), FPS limiting, fallback for weak devices.

import { Canvas } from '@react-three/fiber';
import { useGLTF, OrbitControls, Environment } from '@react-three/drei';

function ProductModel() {
  const { scene } = useGLTF('/models/product.glb');
  return <primitive object={scene} />;
}

export function ProductViewer() {
  return (
    <Canvas camera={{ position: [0, 0, 3], fov: 45 }}>
      <Environment preset="studio" />
      <ProductModel />
      <OrbitControls enableZoom={false} />
    </Canvas>
  );
}

Lenis — library for smooth scroll, replaces native scroll with more controllable one. Often used with GSAP ScrollTrigger.

Framer Motion — for React projects with less complex animations. Sufficient for most promos with section transitions.

Typical Promo Site Blocks

Hero with video or 3D. Video autoplay without sound, muted + playsinline for iOS:

<video
  autoplay muted loop playsinline
  poster="/poster.jpg"
  preload="none"
>
  <source src="/hero.webm" type="video/webm">
  <source src="/hero.mp4" type="video/mp4">
</video>

Scroll storytelling. Each section reveals as user scrolls. Technically — pinned sections via ScrollTrigger + synchronized timelines:

const tl = gsap.timeline({
  scrollTrigger: {
    trigger: '.story-section',
    pin: true,
    start: 'top top',
    end: '+=300%',
    scrub: true,
  }
});

tl.from('.chapter-1', { opacity: 0, y: 50 })
  .to('.chapter-1', { opacity: 0 })
  .from('.chapter-2', { opacity: 0, y: 50 });

Interactive Element. Cursor changes style, elements respond to mousemove, image hotspots with tooltips. All engagement features, not conversion.

Counters and Dynamic Data. Animated numbers, live updates (if product/event is real-time via WebSocket).

Promo Performance

Promo site paradox: it should be visually rich yet load fast. Balance methods:

• progressive reveal — load content as user scrolls, not all at once
• preload critical resources — hero video, first 3D asset
• defer everything not on first screen
• WebP/AVIF for all images, draco compression for 3D models
• code splitting — each section as separate chunk
• reduced-motion — disable animations for users with prefers-reduced-motion:

@media (prefers-reduced-motion: reduce) {
  .animated-element {
    animation: none;
    transition: none;
  }
}

In JS:

const prefersReduced = window.matchMedia('(prefers-reduced-motion: reduce)').matches;
if (!prefersReduced) {
  initAnimations();
}

Mobile Version of Promo

Promo sites are often developed with desktop focus, mobile version simplified. This is normal practice if simplification is conscious and documented in spec. Heavy scroll-based animations on mobile work worse: lower performance, native scroll less predictable.

Alternative: separate mobile scenario without pinned sections — auto-transition by click instead of scroll, simplified CSS animations.

Lifetime and Support

Promo for event (conference, product launch) lives 2-6 months. This should be considered when choosing infrastructure: no need to set up full VPS with CI/CD for page running 3 months. Vercel/Netlify with auto-deploy from Git — optimal.

After campaign: either redirect to main domain or static archive (disable JS, preserve visual state).

Typical Timeline

Promo without 3D, with GSAP animations and custom design — 3-4 weeks. With 3D models, interactive product viewer or custom WebGL effects — 5-8 weeks. Large-scale promos with multiple languages, A/B tests and integrations — from 8 weeks.