Timeline House
Timeline UI

Fade-in Hero

A hero section with a smooth fade-in and upward slide animation on page load.

Fade-in Hero

A full-screen hero section that animates in with a fade and upward slide when the page loads.

Animation Process

The animation uses CSS @keyframes combined with the Intersection Observer API to trigger the effect only when the element enters the viewport.

"use client";
import { useEffect, useRef } from "react";

export function FadeInHero() {
  const ref = useRef<HTMLDivElement>(null);

  useEffect(() => {
    const el = ref.current;
    if (!el) return;

    const observer = new IntersectionObserver(
      ([entry]) => {
        if (entry.isIntersecting) {
          el.classList.add("animate-fade-in-up");
          observer.unobserve(el);
        }
      },
      { threshold: 0.1 }
    );

    observer.observe(el);
    return () => observer.disconnect();
  }, []);

  return (
    <div
      ref={ref}
      className="opacity-0 translate-y-8 transition-all duration-700 ease-out"
    >
      <h1>Your headline here</h1>
    </div>
  );
}

Key steps:

  1. Start with opacity: 0 and translateY offset
  2. On intersection, add the animation class
  3. The transition smoothly reveals the content

Source Code

View the full implementation on GitHub.