text-shimmer

1"use client";
2 
3import React, { useMemo, type JSX } from "react";
4import { motion } from "motion/react";
5import { cn } from "@/lib/utils";
6 
7export type TextShimmerProps = {
8  children: string;
9  as?: React.ElementType;
10  className?: string;
11  duration?: number;
12  spread?: number;
13  baseColor?: string;
14  shimmerColor?: string;
15  style?: React.CSSProperties;
16};
17 
18function TextShimmerComponent({
19  children,
20  as: Component = "p",
21  className,
22  duration = 2,
23  spread = 2,
24  baseColor,
25  shimmerColor,
26  style,
27}: TextShimmerProps) {
28  const MotionComponent = motion.create(
29    Component as keyof JSX.IntrinsicElements,
30  );
31 
32  const dynamicSpread = useMemo(() => {
33    return children.length * spread;
34  }, [children, spread]);
35 
36  return (
37    <MotionComponent
38      className={cn(
39        "relative inline-block bg-size-[250%_100%,auto] bg-clip-text",
40        "[-webkit-text-fill-color:transparent]",
41        "[background-repeat:no-repeat,padding-box] [--bg:linear-gradient(90deg,#0000_calc(50%-var(--spread)),var(--base-gradient-color),#0000_calc(50%+var(--spread)))]",
42        className,
43      )}
44      initial={{ backgroundPosition: "100% center" }}
45      animate={{ backgroundPosition: "0% center" }}
46      transition={{
47        repeat: Infinity,
48        duration,
49        ease: "linear",
50      }}
51      style={
52        {
53          ...style,
54          "--spread": `${dynamicSpread}px`,
55          "--base-color":
56            baseColor ?? "color-mix(in oklab, currentColor 55%, transparent)",
57          "--base-gradient-color": shimmerColor ?? "currentColor",
58          backgroundImage: `var(--bg), linear-gradient(var(--base-color), var(--base-color))`,
59        } as React.CSSProperties
60      }
61    >
62      {children}
63    </MotionComponent>
64  );
65}
66 
67export const TextShimmer = React.memo(TextShimmerComponent);