404 / Not Found Glitch

1"use client";
2// beui.dev/components/blocks/not-found
3 
4import { useEffect, useState } from "react";
5import { useReducedMotion } from "motion/react";
6import {
7  NOT_FOUND_DEFAULTS,
8  NotFoundActions,
9  NotFoundStage,
10  type NotFoundProps,
11} from "./shared";
12 
13const GLYPHS = "ABCDEFGHJKLMNPQRSTUVWXYZ0123456789#%&@$?/\\";
14const SCRAMBLE_MS = 700;
15const TICK_MS = 45;
16 
17/**
18 * Renders the code, scrambling each character on mount before it settles.
19 * SSR and the first paint show the real code, so the scramble is a pure
20 * client-side enhancement and reduced-motion users see the code immediately.
21 */
22function Scramble({ text }: { text: string }) {
23  const reduce = useReducedMotion();
24  const [display, setDisplay] = useState(text);
25 
26  useEffect(() => {
27    if (reduce) {
28      setDisplay(text);
29      return;
30    }
31    const chars = text.split("");
32    const start = performance.now();
33    let raf = 0;
34    let last = 0;
35 
36    const loop = (now: number) => {
37      if (now - last >= TICK_MS) {
38        last = now;
39        const progress = Math.min((now - start) / SCRAMBLE_MS, 1);
40        const settled = Math.floor(progress * chars.length);
41        setDisplay(
42          chars
43            .map((ch, i) =>
44              i < settled || ch === " "
45                ? ch
46                : GLYPHS[Math.floor(Math.random() * GLYPHS.length)],
47            )
48            .join(""),
49        );
50      }
51      if (now - start < SCRAMBLE_MS) {
52        raf = requestAnimationFrame(loop);
53      } else {
54        setDisplay(text);
55      }
56    };
57    raf = requestAnimationFrame(loop);
58    return () => cancelAnimationFrame(raf);
59  }, [text, reduce]);
60 
61  return <span className="tabular-nums">{display}</span>;
62}
63 
64export function NotFoundGlitch({
65  className,
66  code = NOT_FOUND_DEFAULTS.code,
67  title = NOT_FOUND_DEFAULTS.title,
68  description = NOT_FOUND_DEFAULTS.description,
69  homeHref,
70  homeLabel,
71  browseHref,
72  browseLabel,
73}: NotFoundProps) {
74  return (
75    <NotFoundStage className={className}>
76      <div className="group relative select-none font-mono font-bold leading-none tracking-tighter text-foreground [font-size:clamp(5rem,18vw,11rem)]">
77        {/* Chromatic ghost layers, nudged apart on hover. */}
78        <span
79          aria-hidden
80          className="pointer-events-none absolute inset-0 text-[#ff0040] opacity-0 mix-blend-screen transition-[transform,opacity] duration-150 ease-out group-hover:translate-x-[3px] group-hover:opacity-70 motion-reduce:hidden"
81        >
82// … truncated