Build, test, and debug regular expressions
Validates strong passwords (senha forte) by requiring at least 8 characters containing a digit, a lowercase letter, an uppercase letter, and a special character ($, *, &, @, or #). Four lookaheads enforce the presence of each character class, while the trailing character class restricts the password to word characters, spaces, and those specific symbols. With global and multiline flags, it can validate passwords line by line in JavaScript, useful for form validation or bulk-checking credential lists.