Extract Date

const CLASS_ATTRS: Set<string>;

const DATE_ATTRIBUTES: Set<string>;

const ITEMPROP_ATTRS: Set<string>;

const ITEMPROP_ATTRS_MODIFIED: Set<string>;

const ITEMPROP_ATTRS_ORIGINAL: Set<string>;

const NAME_MODIFIED: Set<string>;

const NON_DIGITS_REGEX: RegExp;

const PROPERTY_MODIFIED: Set<string>;

function extractDate(
   htmlobject: Document, 
   extensive_search?: boolean, 
   original_date?: boolean, 
   outputformat?: string, 
   url?: string, 
   verbose?: boolean, 
   min_date?: Date, 
   max_date?: Date, 
   deferred_url_extractor?: boolean): string;