blog.hangerthem.com/app/feed.xml/route.ts
HangerThem 30ef0d611e Bug fixes, SEO, performance and accessibility pass (#1)
## Summary

A cleanup pass across the blog: route and feed bugs fixed, SEO basics added, smaller and lazier images, accessibility fixes, and a real README. No content or design changes beyond small fixes.

## Bug fixes

- **Tag/category pages**: static params now use slugs, so pre-rendered pages match the links (before, `/tags/standard-model` was only rendered on demand and the pre-built pages said "Tag not found"). Unknown slugs now return a real 404, and there's a new not-found page.
- **Recently updated**: sorts by last modification *before* taking the top 5, so older posts that were updated recently now show up.
- **Atom feed**: `rel="self"` now points to `/feed.xml` (was `/feed`); `<updated>` uses the `updated` frontmatter field.
- **No-JS flash**: the `no-js` → `js` class swap runs in an inline `<head>` script before first paint, not after hydration.
- **Markdown links**: only internal paths go through `next/link`; `#anchors`, `mailto:` and links without an `href` no longer break.
- **Invalid HTML**: images in a paragraph together with text (e.g. "**Screenshots:**" followed by images on the Projects page) produced `<p><figure>` and a hydration error. Those paragraphs are now split.
- **Dates**: frontmatter dates are normalized to ISO, so `<time datetime>` values are valid. Formatting is pinned to Europe/Prague so a UTC build server can't shift a date by a day.

## SEO

- `sitemap.xml` and `robots.txt`
- Canonical URLs, Twitter cards and a feed link on every page, built by a shared `pageMetadata()` helper
- Generated Open Graph images: a site card, and for each post its cover image or a branded title card (pre-rendered at build time)
- `BlogPosting` JSON-LD on post pages

## Performance

- Only the post cover and the latest-post image are preloaded (was: every image)
- In-post image quality 100 → 90, plus responsive `sizes`
- Screenshots downscaled to 1800px wide; `linkboard-old.png` converted to WebP (3.1 MB → 60 KB)
- `CodeWrapper` is now a server component; only the copy button ships to the client
- Mermaid CDN script pinned to `11.17.2` for reproducible builds

## Accessibility

- Accessible names for icon-only links (share, social, mobile nav) and `aria-current` on active nav items
- Copy button: uses React state instead of mutating `innerHTML`, handles clipboard errors, announces the result to screen readers, and is no longer inside an `aria-hidden` header
- Code-block line numbers hidden from screen readers
- Image captions: the Markdown `"title"` becomes the caption; captions that only repeat the alt text are hidden from screen readers

## Content & maintenance

- **Frontmatter validation**: a missing or malformed field fails the build and names the file, instead of rendering a broken post
- **`draft: true` support**: drafts only render in development
- About/Projects/Setup pages share one `MarkdownPage` component; tag/category lists share `PostList`
- Markdown rendering is cached, so metadata and page share one render
- New README covering features, env vars, frontmatter schema, Markdown extensions and deployment
- Removed unused ESLint setup and the unrelated `hast` package; `oxlint`, `oxfmt` and `puppeteer` moved to devDependencies (locked versions unchanged)
- Typo fix in the Tessera cover alt text; removed unused `math`/`mermaid` flags from two posts

## Deployment notes

- **`SITE_URL` is now required**: the build fails with a clear error if it's missing.
- **Puppeteer is a devDependency now**: Nixpacks installs dev dependencies for the build by default, but check that Mermaid diagrams render on the first deploy (the Standard Model post has one).

## Testing

- `tsc --noEmit` and `bun run lint` pass
- `bun run build` passes; all 81 pages are generated statically
- Smoke-tested `next start`: posts, tags, categories, feed, sitemap and OG images return 200; unknown tags and routes return 404
- No block elements nested inside `<p>` in any built page

Reviewed-on: #1
2026-10-19 12:41:40 +00:00

67 lines
2 KiB
TypeScript

import { AUTHOR, SITE_NAME, SITE_URL } from '@/app/metadata'
import { getAllPostsMeta } from '@/lib/posts'
import type { PostMeta } from '@/types/Post.type'
export const dynamic = 'force-static'
const lastModified = (p: PostMeta) => new Date(p.updated ?? p.date)
function escapeXml(str: string) {
return str
.replace(/&/g, '&amp;')
.replace(/</g, '&lt;')
.replace(/>/g, '&gt;')
.replace(/"/g, '&quot;')
.replace(/'/g, '&apos;')
}
export async function GET(req: Request) {
const posts = getAllPostsMeta()
const updated =
posts.length > 0
? new Date(Math.max(...posts.map((p) => lastModified(p).getTime()))).toISOString()
: new Date().toISOString()
const entries = posts
.map((p) => {
const url = `${SITE_URL}/posts/${p.slug}`
const date = new Date(p.date).toISOString()
const modified = lastModified(p).toISOString()
return `
<entry>
<title>${escapeXml(p.title)}</title>
<link href="${url}" rel="alternate" type="text/html" />
<id>${url}</id>
<published>${date}</published>
<updated>${modified}</updated>
<content type="text/html" src="${url}" />
<summary>${escapeXml(p.description)}</summary>
</entry>`
})
.join('')
const feed = `<?xml version="1.0" encoding="UTF-8"?>
<feed xmlns="http://www.w3.org/2005/Atom">
<id>${SITE_URL}/</id>
<title>${escapeXml(SITE_NAME)}</title>
<updated>${updated}</updated>
<author>
<name>${escapeXml(AUTHOR.name)}
<uri>${AUTHOR.url}</uri></name>
</author>
<link href="${SITE_URL}/feed.xml" rel="self" type="application/atom+xml" />
<link href="${SITE_URL}" rel="alternate" type="text/html" />
<rights>© ${new Date().getFullYear()} ${escapeXml(AUTHOR.name)}</rights>
${entries}
</feed>`
const accept = req.headers.get('accept') || ''
const contentType = accept.includes('application/atom+xml')
? 'application/atom+xml; charset=utf-8'
: 'application/xml; charset=utf-8'
return new Response(feed, {
headers: { 'Content-Type': contentType },
})
}