How to separate dynamic content from static structure on a website?

Question

JavaScript

Actually I write a parser. Actually, I'm still thinking about it. The static part of the site is a header, sidebar, footer, perhaps banners and braincrambs (the difficulty is that the STML of these parts of the site can change on different pages). The dynamic part is the content that changes from page to page and actually represents the main value of the page. It is necessary to separate the static structure of the site from the dynamic content

Answer 1

take any two pages from any site and compare html, everything that does not match in tag chains, and will be dynamic content
, as I understand it, the scale of content theft takes unrealistic AI sizes