Test, validate and match regular expressions
Matches an HTML <div> tag with the specific id 'testId' and class 'testClass', lazily capturing its inner content up to the first closing </div> tag. The dotall (s) flag allows the captured content to span multiple lines, while the global (g) flag finds all occurrences in the input. Commonly used for simple HTML scraping or content extraction, though it will not correctly handle nested <div> elements since it stops at the first closing tag.