Scrape takes in a Scraper struct, an URL to scrape, and optionally extra options.

Hook maps a handler of type HookFn to a DOMPath in the tree.

ScrapeOptions contains extra parameters used when scraping.

Extension is an interface which allows for adding extensions on-demand to scraping implementations.

Scraper is an interface which scraping implementations should implement.

HookFn is a callback function for processing HTML data at a given place in the DOM tree The first e argument gives access to the DOM, and the second data argument carries a pointer to the data struct you want to save important information in.