When transferring a self-written site to a framework, will the code change?

Question

Frameworks

Hello. If a self-written site is moved to a framework, will the site code change, that is, the html code will change?

Answer 1

The very meaning of "transfer" is rewriting the code so that instead of self-written code elements, framework code elements will be used.
Whether the HTML code will change depends on what the rewriting is about. If the site engine is rewritten, then the HTML may not change.
If the interface is rewritten, that is, we are talking about an HTML + JavaScript framework, then, obviously, HTML will change.

Answer 2

Yes.