feat: add InfiniteMovingCards component with customizable scroll animation

src/components/magicui/infinite-moving-cards.tsx

@@ -0,0 +1,105 @@
+"use client";
+
+import { cn } from "@/lib/utils";
+import React, { useCallback, useEffect, useState } from "react";
+
+export const InfiniteMovingCards = ({
+  items,
+  direction = "left",
+  speed = "fast",
+  pauseOnHover = true,
+  className,
+}: {
+  items: React.ReactNode[];
+  direction?: "left" | "right";
+  speed?: "fast" | "normal" | "slow";
+  pauseOnHover?: boolean;
+  className?: string;
+}): JSX.Element => {
+  const containerRef = React.useRef<HTMLDivElement>(null);
+  const scrollerRef = React.useRef<HTMLUListElement>(null);
+  const [start, setStart] = useState(false);
+
+  const getDirection = useCallback(() => {
+    if (containerRef.current) {
+      if (direction === "left") {
+        containerRef.current.style.setProperty("--animation-direction", "forwards");
+      } else {
+        containerRef.current.style.setProperty("--animation-direction", "reverse");
+      }
+    }
+  }, [direction]);
+
+  const getSpeed = useCallback(() => {
+    if (containerRef.current) {
+      if (speed === "fast") {
+        containerRef.current.style.setProperty("--animation-duration", "20s");
+      } else if (speed === "normal") {
+        containerRef.current.style.setProperty("--animation-duration", "40s");
+      } else {
+        containerRef.current.style.setProperty("--animation-duration", "80s");
+      }
+    }
+  }, [speed]);
+
+  const addAnimation = useCallback(() => {
+    if (containerRef.current && scrollerRef.current) {
+      const scrollerContent = Array.from(scrollerRef.current.children);
+
+      scrollerContent.forEach((item) => {
+        const duplicatedItem = item.cloneNode(true);
+        if (scrollerRef.current) {
+          scrollerRef.current.appendChild(duplicatedItem);
+        }
+      });
+
+      getDirection();
+      getSpeed();
+      setStart(true);
+    }
+  }, [getDirection, getSpeed]);
+
+  useEffect(() => {
+    addAnimation();
+  }, [addAnimation]);
+
+  return (
+    <div
+      ref={containerRef}
+      className={cn(
+        "scroller relative z-20 max-w-7xl overflow-hidden [mask-image:linear-gradient(to_right,transparent,white_20%,white_80%,transparent)]",
+        className
+      )}
+    >
+      <ul
+        ref={scrollerRef}
+        className={cn(
+          "flex min-w-full shrink-0 gap-4 py-4 w-max flex-nowrap",
+          start && "animate-scroll",
+          pauseOnHover && "hover:[animation-play-state:paused]"
+        )}
+      >
+        {items.map((item, idx) => (
+          <li
+            className="w-[350px] max-w-full relative rounded-2xl border border-b-0 flex-shrink-0 border-slate-700 px-8 py-6 md:w-[450px]"
+            style={{
+              background:
+                "linear-gradient(180deg, var(--slate-800), var(--slate-900))",
+            }}
+            key={idx}
+          >
+            <blockquote>
+              <div
+                aria-hidden="true"
+                className="user-select-none -z-1 pointer-events-none absolute -left-0.5 -top-0.5 h-[calc(100%_+_4px)] w-[calc(100%_+_4px)]"
+              ></div>
+              <span className="relative z-20 text-sm leading-[1.6] text-gray-100 font-normal">
+                {item}
+              </span>
+            </blockquote>
+          </li>
+        ))}
+      </ul>
+    </div>
+  );
+};