Whenever you get Javascript to interpret this string, the 'n' will be rendered as a newline (which is a single character, hence the length.)

To use the string as a literal backslash-n, try escaping the backslash with another one. Like so:

Line 1\nLine 2

If you can't do this when the string is created, you can turn the one string into the other with this:

Line 1nLine 2.replace(/n/, \n);

If you might have multiple occurrences of the newline, you can get them all at once by making the regex global, like this:

Line 1nLine 2nLine 3.replace(/n/g, \n);