Error9: 404 Did You Mean

A left-aligned 404 for sites where URLs move: the address that failed is printed struck through in monospace, and directly beneath it a did-you-mean box links to the closest matching page.

Installation

Radix flavor

npx shadcn add "https://ui.beste.co/r/error9"

Base UI flavor

npx shadcn add "https://ui.beste.co/r-base/error9"

This installs the block to components/beste/block/error9.tsx, plus the button shadcn/ui primitive it uses for the closing action.

Quick start

The installed file exports error9Demo alongside the block: the exact props behind the preview above. Spread it to get a working page in one line.

import { Error9, error9Demo } from "@/components/beste/block/error9";

export default function NotFound() {
  return <Error9 {...error9Demo} />;
}

Feed it the real pathname and whatever your redirect map suggests:

"use client";

import { usePathname } from "next/navigation";
import { Error9 } from "@/components/beste/block/error9";

export default function NotFound() {
  const pathname = usePathname();

  return (
    <Error9
      code="404"
      heading="That page moved"
      description="We could not match this address, but one page comes close."
      requestedPath={pathname}
      suggestionLabel="Did you mean"
      suggestion={{ label: "/docs/getting-started", href: "/docs/getting-started" }}
      button={{ label: "Back to home", href: "/" }}
    />
  );
}

Props

type ActionLink = {
  label: string;
  href: string;
};

Behavior notes

• The failed path is truncated with truncate, so a long URL shortens with an ellipsis instead of wrapping across lines and pushing the suggestion box down.
• The suggestion link itself uses break-all, so a long suggested path wraps inside the box rather than overflowing it.
• The suggestion box only renders when suggestion is set. suggestionLabel on its own renders nothing, which keeps the block usable as a plain 404 when no match was found.
• The block is static markup with no client state, so the suggestion has to be computed by the caller (a redirect table, a slug distance check) and passed in.