Progressive Blur

1'use client';
2import { cn } from '@/lib/utils';
3import { HTMLMotionProps, motion } from 'motion/react';
4 
5export const GRADIENT_ANGLES = {
6  top: 0,
7  right: 90,
8  bottom: 180,
9  left: 270,
10};
11 
12export type ProgressiveBlurProps = {
13  direction?: keyof typeof GRADIENT_ANGLES;
14  blurLayers?: number;
15  className?: string;
16  blurIntensity?: number;
17} & HTMLMotionProps<'div'>;
18 
19export function ProgressiveBlur({
20  direction = 'bottom',
21  blurLayers = 8,
22  className,
23  blurIntensity = 0.25,
24  ...props
25}: ProgressiveBlurProps) {
26  const layers = Math.max(blurLayers, 2);
27  const segmentSize = 1 / (blurLayers + 1);
28 
29  return (
30    <div className={cn('relative', className)}>
31      {Array.from({ length: layers }).map((_, index) => {
32        const angle = GRADIENT_ANGLES[direction];
33        const gradientStops = [
34          index * segmentSize,
35          (index + 1) * segmentSize,
36          (index + 2) * segmentSize,
37          (index + 3) * segmentSize,
38        ].map(
39          (pos, posIndex) =>
40            `rgba(255, 255, 255, ${posIndex === 1 || posIndex === 2 ? 1 : 0}) ${pos * 100}%`
41        );
42 
43        const gradient = `linear-gradient(${angle}deg, ${gradientStops.join(
44          ', '
45        )})`;
46 
47        return (
48          <motion.div
49            key={index}
50            className='pointer-events-none absolute inset-0 rounded-[inherit]'
51            style={{
52              maskImage: gradient,
53              WebkitMaskImage: gradient,
54              backdropFilter: `blur(${index * blurIntensity}px)`,
55              WebkitBackdropFilter: `blur(${index * blurIntensity}px)`,
56            }}
57            {...props}
58          />
59        );
60      })}
61    </div>
62  );
63}