How to count the number of lines of a string in javascript


I want to count the number of lines in a string

i tried to use this stackoverflow answer :

lines = str.split("\r\n|\r|\n");
return  lines.length;

on this string(which was originally a buffer):

 GET / HTTP/1.1
 Host: localhost:8888
 Connection: keep-alive
 Cache-Control: max-age=0
 User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_7_2) AppleWebKit/535.2 (KHTML,like Gecko) Chrome/15.0.874.121 Safari/535.2
 Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8
 Accept-Encoding: gzip,deflate,sdch
 Accept-Language: en-US,en;q=0.8
 Accept-Charset: ISO-8859-1,utf-8;q=0.7,*;q=0.3

and for some reason i got lines='1'.

any idea how to make it work?

Using a regular expression you can count the number of lines as


Alternately you can try split method as below.

var lines = $("#ptest").val().split("\n");

working solution: