Spotlight Card

Props

Source

"use client";
/*
 * Ported from react-bits (MIT, © David Haz): src/ts-tailwind/Components/SpotlightCard/SpotlightCard.tsx @ 9d0270d
 *
 * MIT License
 *
 * Copyright (c) 2026 David Haz
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in all
 * copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 */

import type React from "react";
import { useRef, useState } from "react";
import { cn } from "@/lib/utils";

interface Position {
  x: number;
  y: number;
}

export interface SpotlightCardProps extends React.PropsWithChildren {
  className?: string;
  spotlightColor?: `rgba(${number}, ${number}, ${number}, ${number})`;
}

const SpotlightCard: React.FC<SpotlightCardProps> = ({
  children,
  className = "",
  spotlightColor = "rgba(255, 255, 255, 0.25)",
}) => {
  const divRef = useRef<HTMLDivElement>(null);
  const [isFocused, setIsFocused] = useState<boolean>(false);
  const [position, setPosition] = useState<Position>({ x: 0, y: 0 });
  const [opacity, setOpacity] = useState<number>(0);

  const handleMouseMove: React.MouseEventHandler<HTMLDivElement> = (e) => {
    if (!divRef.current || isFocused) return;

    const rect = divRef.current.getBoundingClientRect();
    setPosition({ x: e.clientX - rect.left, y: e.clientY - rect.top });
  };

  const handleFocus = () => {
    setIsFocused(true);
    setOpacity(0.6);
  };

  const handleBlur = () => {
    setIsFocused(false);
    setOpacity(0);
  };

  const handleMouseEnter = () => {
    setOpacity(0.6);
  };

  const handleMouseLeave = () => {
    setOpacity(0);
  };

  return (
    // biome-ignore lint/a11y/noStaticElementInteractions: pointer tracking only, the card itself is not interactive
    <div
      ref={divRef}
      onMouseMove={handleMouseMove}
      onFocus={handleFocus}
      onBlur={handleBlur}
      onMouseEnter={handleMouseEnter}
      onMouseLeave={handleMouseLeave}
      className={cn(
        "relative rounded-3xl border border-neutral-800 bg-neutral-900 overflow-hidden p-8",
        className,
      )}
    >
      <div
        className="pointer-events-none absolute inset-0 opacity-0 transition-opacity duration-500 ease-in-out"
        style={{
          opacity,
          background: `radial-gradient(circle at ${position.x}px ${position.y}px, ${spotlightColor}, transparent 80%)`,
        }}
      />
      {children}
    </div>
  );
};

export { SpotlightCard };
export default SpotlightCard;