Magic UI: Infinite Autonomous Marquee

import { cn } from "@/lib/utils";

interface MarqueeProps {
  className?: string;
  reverse?: boolean;
  pauseOnHover?: boolean;
  children?: React.ReactNode;
  vertical?: boolean;
  repeat?: number;
  [key: string]: any;
}

export function Marquee({
  className,
  reverse = false,
  pauseOnHover = false,
  children,
  vertical = false,
  repeat = 4,
  ...props
}: MarqueeProps) {
  return (
    <div
      {...props}
      className={cn(
        "group flex overflow-hidden p-2 [--duration:40s] [--gap:1rem] [gap:var(--gap)]",
        {
          "flex-row": !vertical,
          "flex-col": vertical,
        },
        className
      )}
    >
      {Array(repeat)
        .fill(0)
        .map((_, i) => (
          <div
            key={i}
            className={cn("flex shrink-0 justify-around [gap:var(--gap)]", {
              "animate-marquee flex-row": !vertical,
              "animate-marquee-vertical flex-col": vertical,
              "group-hover:[animation-play-state:paused]": pauseOnHover,
              "[animation-direction:reverse]": reverse,
            })}
          >
            {children}
          </div>
        ))}
    </div>
  );
}

// tailwind.config.js
module.exports = {
  theme: {
    extend: {
      animation: {
        marquee: "marquee var(--duration) linear infinite",
        "marquee-vertical": "marquee-vertical var(--duration) linear infinite",
      },
      keyframes: {
        marquee: {
          from: { transform: "translateX(0)" },
          to: { transform: "translateX(calc(-100% - var(--gap)))" },
        },
        "marquee-vertical": {
          from: { transform: "translateY(0)" },
          to: { transform: "translateY(calc(-100% - var(--gap)))" },
        },
      },
    },
  },
};

/* Pure Vanilla CSS Implementation */
.marquee-container {
  --duration: 35s;
  --gap: 24px;
  display: flex;
  overflow: hidden;
  mask-image: linear-gradient(to right, transparent, black 10%, black 90%, transparent);
  -webkit-mask-image: linear-gradient(to right, transparent, black 10%, black 90%, transparent);
}

.marquee-track {
  display: flex;
  flex-shrink: 0;
  gap: var(--gap);
  animation: marquee-scroll var(--duration) linear infinite;
  will-change: transform;
}

.marquee-container:hover .marquee-track {
  animation-play-state: paused;
}

@keyframes marquee-scroll {
  from { transform: translateX(0); }
  to { transform: translateX(calc(-100% - var(--gap))); }
}