Regex - Extract a substring of a email document with a regular expression

Question

I'm trying to extract a substring of an email document with a regular expression. I'm testing the regex online, and it works perfectly:

online regex tester

I have a function to check the regex on Google Apps Script and the same regex isn't working here.

var regex = new RegExp("Intrusion signature\(s\)\:\n\n(.*)");
var e = regex.exec(data);

Google Apps Script code

Logger

Does anyone knows why is not working?

Answer 1

Using a literal regex instead of converting the string to a regex works.

var regex = new RegExp(/Intrusion signature\(s\)\:\n\n(.*)/);