@markuplint/spec-generator

Private builder used to generate @markuplint/html-spec.

It assembles an Extended Spec JSON from the HTML element source files and external references (MDN, WAI-ARIA, HTML-ARIA), then writes index.json in @markuplint/html-spec.

How it is invoked

Called from packages/@markuplint/html-spec/build.mjs:

await main({
  outputFilePath: 'index.json',
  htmlFilePattern: 'src/spec.*.json',
  commonAttrsFilePath: 'src/spec-common.attributes.json',
  commonContentsFilePath: 'src/spec-common.contents.json',
});

You normally don't run this directly; use:

• From repo root: yarn up:gen
• Only html-spec: yarn workspace @markuplint/html-spec run gen

What it does

1. Read element sources -- Load every src/spec.*.json and infer the element name from the filename
2. Enrich from MDN -- Fetch MDN element pages for descriptions, categories, and attribute metadata (manual specs take precedence)
3. Add obsolete elements -- Inject HTML obsolete elements and deprecated SVG elements
4. Load shared data -- Read global attributes and content model definitions
5. Build ARIA definitions -- Scrape WAI-ARIA (1.1/1.2/1.3), Graphics-ARIA, and HTML-ARIA
6. Emit Extended Spec JSON -- Write { cites, def, specs } to index.json

For detailed architecture and data flow, see ARCHITECTURE.md.

Precedence rules

• Manual data in src/spec.*.json overrides MDN-scraped values on conflict.
• Attribute objects are merged per name; manual keys win, MDN may fill missing flags.
• Shared files under src/spec-common.*.json are imported as-is.

Network and caching

• Uses live HTTP fetch against MDN/W3C specs. There is an in-process cache for the current run only.
• If a fetch fails, the entry may be left empty; re-run later or edit your manual source to cover it.

When to change this package

• Only when the scraping targets change (DOM structure/URLs), or when the Extended Spec shape evolves in @markuplint/ml-spec.

Documentation

• ARCHITECTURE.md -- Package overview, module structure, data flow
• docs/modules.md -- Detailed reference for each source module
• docs/scraping.md -- Web scraping targets, CSS selectors, and error handling
• docs/maintenance.md -- Troubleshooting, common recipes, and debugging

Japanese versions are also available:

• ARCHITECTURE.ja.md
• docs/modules.ja.md
• docs/scraping.ja.md
• docs/maintenance.ja.md

See also

• @markuplint/html-spec README -- how to edit the element sources.
• @markuplint/ml-spec README -- schema shapes, generation, and spec merging.