Structured data extraction

Most scrapers parse markup that was never intended to be an interface, which is why they break on every restyling. The same pages usually publish typed, documented data alongside that markup — JSON-LD for search engines, Open Graph for social previews, and their own application state as JSON for the frontend. Those exist because breaking them costs the site traffic or functionality, which is exactly the property you want to depend on.

So look before you select. It is frequently faster, usually more accurate, and it survives the redesign that would have broken a selector.

Why this beats selectors

Stability. A generated class name like .css-1x2y3z changes when anyone edits the styles. A JSON-LD Product.offers.price changes when the site changes its data model, which is rare and deliberate.