API Docs Builder

Generates interactive API documentation from TypeScript sources for Video.js 10 components.

Architecture

TypeScript Sources (core/html packages)
         ↓
   api-docs-builder (typescript-api-extractor)
         ↓
   JSON files (site/src/content/generated-api-reference/)
         ↓
   <ApiRefSection /> Astro component
         ↓
   Interactive tables in MDX pages

How It Works

1. Source Discovery

The builder scans packages/core/src/core/ui/ for component directories. For each component (e.g., play-button), it looks for:

Core file: play-button-core.ts → Extracts PlayButtonProps, PlayButtonState, and defaultProps
Data attrs file: play-button-data-attrs.ts → Extracts data attributes with JSDoc descriptions
HTML element file: packages/html/src/ui/play-button/play-button-element.ts → Extracts tagName

2. TypeScript Extraction

Uses typescript-api-extractor to parse TypeScript AST and extract:

Interface properties with types and JSDoc descriptions
Default values from static defaultProps = { ... }
Data attributes from const PlayButtonDataAttrs = { ... } as const
Lit element tag names from static tagName = 'media-play-button'

3. JSON Output

Generates one JSON file per component at site/src/content/generated-api-reference/{kebab-case-name}.json:

{
  "name": "PlayButton",
  "props": {
    "label": {
      "type": "string | ((state: PlayButtonState) => string)",
      "description": "Custom label for the button.",
      "default": "''"
    }
  },
  "state": {
    "paused": {
      "type": "boolean",
      "description": "Whether playback is paused."
    }
  },
  "dataAttributes": {
    "data-paused": {
      "description": "Present when the media is paused."
    }
  },
  "platforms": {
    "html": {
      "tagName": "media-play-button"
    }
  }
}

4. Astro Components

The <ApiRefSection /> component:

Loads the JSON via Astro Content Collections (getEntry('apiReference', 'play-button'))
Filters props based on current framework (hides React-only props on HTML pages)
Renders interactive tables with expandable prop details

Usage

In MDX

import ApiRefSection from '@/components/docs/api-reference/ApiRefSection.astro';

## API Reference

### Props

<ApiRefSection component="PlayButton" section="props" />

### State

<ApiRefSection component="PlayButton" section="state" />

### Data Attributes

<ApiRefSection component="PlayButton" section="dataAttributes" />

Building

The builder runs automatically before dev/build via npm scripts:

# Run manually
pnpm api-docs

# Runs automatically on:
pnpm dev      # via predev hook
pnpm build    # via prebuild hook

File Structure

site/scripts/api-docs-builder/
├── README.md              # This file
└── src/
    ├── index.ts           # Main entry point, orchestrates handlers
    ├── types.ts           # TypeScript interfaces
    ├── formatter.ts       # Type formatting utilities
    ├── core-handler.ts    # Extracts Props/State from core packages
    ├── data-attrs-handler.ts  # Extracts data attributes
    ├── html-handler.ts    # Extracts Lit element info
    └── tests/
        ├── test-utils.ts
        ├── core-handler.test.ts
        ├── data-attrs-handler.test.ts
        ├── formatter.test.ts
        └── html-handler.test.ts

site/src/
├── content/generated-api-reference/  # Generated JSON files (gitignored)
│   ├── play-button.json
│   └── mute-button.json
└── components/docs/api-reference/
    ├── ApiRefSection.astro    # Main wrapper, loads JSON
    ├── ApiPropsTable.astro    # Props table
    ├── ApiStateTable.astro    # State interface table
    ├── ApiDataAttrsTable.astro # Data attributes table
    └── PropRow.astro          # Expandable prop row

Adding a New Component

Create the component in packages/core/src/core/ui/{name}/
Export {Name}Props interface and {Name}State interface
Optionally create {name}-data-attrs.ts with data attribute definitions
Create the HTML element in packages/html/src/ui/{name}/ with static tagName
Run pnpm api-docs to generate JSON
Use <ApiRefSection component="{Name}" section="{section}" /> in MDX as described above

Differences from base-ui

This implementation is adapted from MUI base-ui's api-docs-builder with key differences:

Multi-platform: One JSON per component containing all platform variants (React/HTML)
Core-first: Props come from core package, not platform-specific components
Data attributes: Extracted from dedicated *-data-attrs.ts files
HTML elements: Extracts Lit element static tagName
No prettier: Uses biome for formatting (removed prettier dependency)

Dependencies

typescript-api-extractor: AST parsing for TypeScript types
es-toolkit: Utility functions (kebabCase, etc.)
tsx: TypeScript execution

All dependencies are in site/package.json devDependencies.