How to find all links on a page to a specific domain?

Question

Regular Expressions

There is a task to cut out all external links to a domain, a static site.
That is, an example, I need to find links like

<a href="http://example.com">1rer</a>
<a href="http://example.com/fdfdsfds">fdsfsdfsd</a>
<a class="fff" href="http://example.com/dsdaas">3e2fdf fdsfds</a>

Answer 1

https://regex101.com/r/NcRP0R/1