Test, validate and match regular expressions
This regex extracts breadcrumb link text from HTML containing a UL element with the class 'breadcrumb-history list-float'. It uses the [\w\W\d\D\s\S] construct to match any character including newlines (a DOTALL alternative), lazily advancing to each <li><a> element and capturing the anchor text in group 1. With the global flag, it matches all breadcrumb items. Typically used in web scraping to pull navigation breadcrumb labels from a specific website's HTML source.