Function extractFeedDiscovery

extractFeedDiscovery(
input: DocumentInput,
documentUrl?: string | URL,
): FeedDiscoveryMetadata
Extract feed discovery metadata from HTML.
Parameters
- input: DocumentInput
  Parsed HTML document or raw HTML string
- OptionaldocumentUrl: string | URL
  Optional document URL for generating absolute feed suggestions
Returns FeedDiscoveryMetadata
Feed discovery metadata
Remarks
Finds all feeds declared in tags and generates suggestions for common feed URL patterns.
Example
```
// With parsed document (recommended for multiple extractions)
const doc = parseHTML(htmlString);
const feeds = extractFeedDiscovery(doc, 'https://example.com');

// Or directly with HTML string
const feeds = extractFeedDiscovery(htmlString, 'https://example.com');
```
- Defined in src/metadata/feed-discovery/extract.ts:36