Projected Shadow Animation

1import * as React from "react";
2 
3import { cn } from "@/lib/utils";
4 
5import "./projected-shadow-animation.css";
6 
7type ProjectedShadowTimingValue = number | string;
8type ProjectedShadowLengthValue = number | string;
9type CssVariableStyle = React.CSSProperties & Record<`--${string}`, string>;
10 
11export type ProjectedShadowOffset = {
12  /** Horizontal offset. Numeric values are converted to px. */
13  x?: ProjectedShadowLengthValue;
14  /** Vertical offset. Numeric values are converted to px. */
15  y?: ProjectedShadowLengthValue;
16};
17 
18export type ProjectedShadowProps = React.ComponentPropsWithoutRef<"span"> & {
19  /** Keep the gathered state active without requiring hover. */
20  active?: boolean;
21  /** Animation duration for release. Numeric values are converted to ms. */
22  duration?: ProjectedShadowTimingValue;
23  /** Animation duration for gather. Numeric values are converted to ms. */
24  activeDuration?: ProjectedShadowTimingValue;
25  /** CSS easing used by the transform and opacity transitions. */
26  ease?: string;
27  /** Blur radius for the far projected shadow. Numeric values are converted to px. */
28  projectedShadowBlur?: ProjectedShadowLengthValue;
29  /** Resting offset for the far projected shadow. */
30  projectedShadowOffset?: ProjectedShadowOffset;
31  /** Optional decorative content for the shadow layers. Defaults to children. */
32  shadow?: React.ReactNode;
33  /** Classes applied to the visible animated child wrapper. */
34  targetClassName?: string;
35  /** Classes applied to the far projected shadow layer. */
36  projectedShadowClassName?: string;
37  /** Classes applied to the close contact shadow layer. */
38  contactShadowClassName?: string;
39  /** Hide the far projected shadow layer. */
40  showProjectedShadow?: boolean;
41  /** Hide the close contact shadow layer. */
42  showContactShadow?: boolean;
43};
44 
45export function ProjectedShadow({
46  active,
47  activeDuration,
48  children,
49  className,
50  contactShadowClassName,
51  duration,
52  ease,
53  projectedShadowClassName,
54  projectedShadowBlur,
55  projectedShadowOffset,
56  shadow,
57  showContactShadow = true,
58  showProjectedShadow = true,
59  style,
60  targetClassName,
61  ...props
62}: ProjectedShadowProps) {
63  const shadowContent = shadow ?? children;
64 
65  return (
66    <span
67      data-slot="projected-shadow"
68      data-active={active ? "true" : undefined}
69      className={cn(
70        "projected-shadow relative inline-flex items-center justify-center",
71        className,
72      )}
73      style={getProjectedShadowStyle(
74        {
75// … truncated