esbuild
up 5 from 37 on 27 May 2026
Embed your badge ↗esbuild scores 42 out of 100 on the a14y v0.3.0-draft scorecard. The scan covered 9 pages, and 48% of the applicable checks passed. The site publishes none of the core agent-discovery files: llms.txt, AGENTS.md, an XML sitemap, and a markdown sitemap.
Site checks · 3/9 passed
Evaluated once against the site's origin: discoverability surfaces like
llms.txt, AGENTS.md, and sitemap signals.
- FAIL llms-txt.exists No llms.txt or llms-full.txt found at /, /.well-known/, or /docs/
- FAIL robots-txt.exists /robots.txt not reachable
- PASS robots-txt.allows-ai-bots No robots.txt; defaults to allow all
- PASS robots-txt.allows-llms-txt No robots.txt
- FAIL sitemap-xml.exists sitemap.xml not reachable
- FAIL sitemap-md.exists sitemap.md not reachable
- FAIL agents-md.exists No agent skill file found
- PASS discovery.no-duplicate-content 9 URLs, no duplicate canonicals
- FAIL discovery.in-page-link no page links to an agent file in-page
Pages · 9
Each page was audited against the same scorecard. Click a page to expand its check results.
47 https://esbuild.github.io/ 9/19
- PASS http.status-200 200
- PASS http.redirect-chain 0 hops
- PASS http.content-type-html text/html; charset=utf-8
- PASS http.no-noindex-noai no x-robots-tag
- FAIL html.canonical-link missing
- FAIL html.meta-description missing
- PASS html.og-title
- FAIL html.og-description missing
- PASS html.lang-attribute en
- FAIL html.json-ld no parseable JSON-LD found
- FAIL html.headings only 1 headings
- PASS html.text-ratio 19.6%
- FAIL html.glossary-link no glossary/terminology link
- FAIL markdown.mirror-suffix no .md/.mdx mirror found
- FAIL markdown.alternate-link no <link rel="alternate" type="text/markdown">
- FAIL markdown.content-negotiation text/html; charset=utf-8
- FAIL discovery.indexed orphaned (not announced by any index)
- PASS html.ssr-content 192 words in initial HTML
- PASS http.no-interstitial
53 https://esbuild.github.io/getting-started/ 10/19
- PASS http.status-200 200
- PASS http.redirect-chain 0 hops
- PASS http.content-type-html text/html; charset=utf-8
- PASS http.no-noindex-noai no x-robots-tag
- FAIL html.canonical-link missing
- FAIL html.meta-description missing
- PASS html.og-title
- FAIL html.og-description missing
- PASS html.lang-attribute en
- FAIL html.json-ld no parseable JSON-LD found
- PASS html.headings 14 headings
- PASS html.text-ratio 41.1%
- FAIL html.glossary-link no glossary/terminology link
- FAIL markdown.mirror-suffix no .md/.mdx mirror found
- FAIL markdown.alternate-link no <link rel="alternate" type="text/markdown">
- FAIL markdown.content-negotiation text/html; charset=utf-8
- FAIL discovery.indexed orphaned (not announced by any index)
- PASS html.ssr-content 3237 words in initial HTML
- PASS http.no-interstitial
47 https://esbuild.github.io/analyze/ 9/19
- PASS http.status-200 200
- PASS http.redirect-chain 0 hops
- PASS http.content-type-html text/html; charset=utf-8
- PASS http.no-noindex-noai no x-robots-tag
- FAIL html.canonical-link missing
- FAIL html.meta-description missing
- PASS html.og-title
- FAIL html.og-description missing
- PASS html.lang-attribute en
- FAIL html.json-ld no parseable JSON-LD found
- FAIL html.headings only 1 headings
- PASS html.text-ratio 23.1%
- FAIL html.glossary-link no glossary/terminology link
- FAIL markdown.mirror-suffix no .md/.mdx mirror found
- FAIL markdown.alternate-link no <link rel="alternate" type="text/markdown">
- FAIL markdown.content-negotiation text/html; charset=utf-8
- FAIL discovery.indexed orphaned (not announced by any index)
- PASS html.ssr-content 53 words in initial HTML
- PASS http.no-interstitial
37 https://esbuild.github.io/try/ 7/19
- PASS http.status-200 200
- PASS http.redirect-chain 0 hops
- PASS http.content-type-html text/html; charset=utf-8
- PASS http.no-noindex-noai no x-robots-tag
- FAIL html.canonical-link missing
- FAIL html.meta-description missing
- PASS html.og-title
- FAIL html.og-description missing
- PASS html.lang-attribute en
- FAIL html.json-ld no parseable JSON-LD found
- FAIL html.headings only 1 headings
- FAIL html.text-ratio 7.4%
- FAIL html.glossary-link no glossary/terminology link
- FAIL markdown.mirror-suffix no .md/.mdx mirror found
- FAIL markdown.alternate-link no <link rel="alternate" type="text/markdown">
- FAIL markdown.content-negotiation text/html; charset=utf-8
- FAIL discovery.indexed orphaned (not announced by any index)
- FAIL html.ssr-content only 9 words in initial HTML (looks like a JS-rendered shell)
- PASS http.no-interstitial
53 https://esbuild.github.io/faq/ 10/19
- PASS http.status-200 200
- PASS http.redirect-chain 0 hops
- PASS http.content-type-html text/html; charset=utf-8
- PASS http.no-noindex-noai no x-robots-tag
- FAIL html.canonical-link missing
- FAIL html.meta-description missing
- PASS html.og-title
- FAIL html.og-description missing
- PASS html.lang-attribute en
- FAIL html.json-ld no parseable JSON-LD found
- PASS html.headings 12 headings
- PASS html.text-ratio 48.9%
- FAIL html.glossary-link no glossary/terminology link
- FAIL markdown.mirror-suffix no .md/.mdx mirror found
- FAIL markdown.alternate-link no <link rel="alternate" type="text/markdown">
- FAIL markdown.content-negotiation text/html; charset=utf-8
- FAIL discovery.indexed orphaned (not announced by any index)
- PASS html.ssr-content 4054 words in initial HTML
- PASS http.no-interstitial
53 https://esbuild.github.io/content-types/ 10/19
- PASS http.status-200 200
- PASS http.redirect-chain 0 hops
- PASS http.content-type-html text/html; charset=utf-8
- PASS http.no-noindex-noai no x-robots-tag
- FAIL html.canonical-link missing
- FAIL html.meta-description missing
- PASS html.og-title
- FAIL html.og-description missing
- PASS html.lang-attribute en
- FAIL html.json-ld no parseable JSON-LD found
- PASS html.headings 22 headings
- PASS html.text-ratio 45.7%
- FAIL html.glossary-link no glossary/terminology link
- FAIL markdown.mirror-suffix no .md/.mdx mirror found
- FAIL markdown.alternate-link no <link rel="alternate" type="text/markdown">
- FAIL markdown.content-negotiation text/html; charset=utf-8
- FAIL discovery.indexed orphaned (not announced by any index)
- PASS html.ssr-content 8245 words in initial HTML
- PASS http.no-interstitial
50 https://esbuild.github.io/api/ 10/20
- PASS http.status-200 200
- PASS http.redirect-chain 0 hops
- PASS http.content-type-html text/html; charset=utf-8
- PASS http.no-noindex-noai no x-robots-tag
- FAIL html.canonical-link missing
- FAIL html.meta-description missing
- PASS html.og-title
- FAIL html.og-description missing
- PASS html.lang-attribute en
- FAIL html.json-ld no parseable JSON-LD found
- PASS html.headings 85 headings
- PASS html.text-ratio 44.1%
- FAIL html.glossary-link no glossary/terminology link
- FAIL markdown.mirror-suffix no .md/.mdx mirror found
- FAIL markdown.alternate-link no <link rel="alternate" type="text/markdown">
- FAIL markdown.content-negotiation text/html; charset=utf-8
- FAIL api.schema-link no openapi/swagger/schema link found
- FAIL discovery.indexed orphaned (not announced by any index)
- PASS html.ssr-content 30999 words in initial HTML
- PASS http.no-interstitial
53 https://esbuild.github.io/plugins/ 10/19
- PASS http.status-200 200
- PASS http.redirect-chain 0 hops
- PASS http.content-type-html text/html; charset=utf-8
- PASS http.no-noindex-noai no x-robots-tag
- FAIL html.canonical-link missing
- FAIL html.meta-description missing
- PASS html.og-title
- FAIL html.og-description missing
- PASS html.lang-attribute en
- FAIL html.json-ld no parseable JSON-LD found
- PASS html.headings 27 headings
- PASS html.text-ratio 48.9%
- FAIL html.glossary-link no glossary/terminology link
- FAIL markdown.mirror-suffix no .md/.mdx mirror found
- FAIL markdown.alternate-link no <link rel="alternate" type="text/markdown">
- FAIL markdown.content-negotiation text/html; charset=utf-8
- FAIL discovery.indexed orphaned (not announced by any index)
- PASS html.ssr-content 10217 words in initial HTML
- PASS http.no-interstitial
42 https://esbuild.github.io/gradient-tests/ 8/19
- PASS http.status-200 200
- PASS http.redirect-chain 0 hops
- PASS http.content-type-html text/html; charset=utf-8
- PASS http.no-noindex-noai no x-robots-tag
- FAIL html.canonical-link missing
- FAIL html.meta-description missing
- FAIL html.og-title missing
- FAIL html.og-description missing
- FAIL html.lang-attribute missing
- FAIL html.json-ld no parseable JSON-LD found
- PASS html.headings 9 headings
- PASS html.text-ratio 17.6%
- FAIL html.glossary-link no glossary/terminology link
- FAIL markdown.mirror-suffix no .md/.mdx mirror found
- FAIL markdown.alternate-link no <link rel="alternate" type="text/markdown">
- FAIL markdown.content-negotiation text/html; charset=utf-8
- FAIL discovery.indexed orphaned (not announced by any index)
- PASS html.ssr-content 273 words in initial HTML
- PASS http.no-interstitial