Tilt Card

1"use client"
2 
3import * as React from "react"
4 
5import { cn } from "@/lib/utils"
6 
7export interface TiltCardProps extends React.ComponentProps<"div"> {
8  /** Largest tilt in degrees, reached at the corners. */
9  max?: number
10  /** Depth of the perspective, as a CSS length. Lower is more extreme. */
11  perspective?: string
12  /** Scale held while the pointer is over the card. */
13  scale?: number
14  /** Lay a sheen over the card that follows the pointer. */
15  glare?: boolean
16  /** Render the card flat. */
17  disabled?: boolean
18}
19 
20export function TiltCard({
21  children,
22  className,
23  max = 10,
24  perspective = "800px",
25  scale = 1.02,
26  glare = true,
27  disabled = false,
28  style,
29  ...props
30}: TiltCardProps) {
31  const ref = React.useRef<HTMLDivElement>(null)
32  const frame = React.useRef(0)
33  const [reduced, setReduced] = React.useState(false)
34 
35  React.useEffect(() => {
36    const query = window.matchMedia("(prefers-reduced-motion: reduce)")
37    setReduced(query.matches)
38 
39    const onChange = (event: MediaQueryListEvent) => setReduced(event.matches)
40    query.addEventListener("change", onChange)
41    return () => query.removeEventListener("change", onChange)
42  }, [])
43 
44  // A tilt is the whole component, so there is nothing to soften for someone
45  // who asked for less motion. The card is rendered flat instead.
46  const flat = disabled || reduced
47 
48  const write = React.useCallback((x: number, y: number, active: number) => {
49    const node = ref.current
50    if (!node) {
51      return
52    }
53    node.style.setProperty("--tilt-x", `${x}`)
54    node.style.setProperty("--tilt-y", `${y}`)
55    node.style.setProperty("--tilt-active", `${active}`)
56  }, [])
57 
58  const reset = React.useCallback(() => {
59    cancelAnimationFrame(frame.current)
60    write(50, 50, 0)
61  }, [write])
62 
63  // Pointer position lands on custom properties inside a frame, so a move
64  // costs a compositor update rather than a React render.
65  const handlePointerMove = React.useCallback(
66    (event: React.PointerEvent<HTMLDivElement>) => {
67      if (flat) {
68        return
69      }
70      const { clientX, clientY } = event
71      cancelAnimationFrame(frame.current)
72      frame.current = requestAnimationFrame(() => {
73        const node = ref.current
74        if (!node) {
75          return
76        }
77        const rect = node.getBoundingClientRect()
78        write(
79          ((clientX - rect.left) / rect.width) * 100,
80          ((clientY - rect.top) / rect.height) * 100,
81          1
82        )
83      })
84    },
85    [flat, write]
86  )
87 
88// … truncated