Is string.indexOf() treated the same on Linux vs Windows?

I’m not an experienced JavaScript programmer. This is my first project using JS.

I’m developing on Linux and am at the point for my first release. Running the project on a Windows machine I came across the following …

global.DBSysInfo;

console.log("DBSysInfo =n" + DBSysInfo);
var pnt1 = DBSysInfo.indexOf('DBActive = "yes"');
console.log("pnt1 = " + pnt1);
var pnt2 = DBSysInfo.indexOf(os.EOL + os.EOL, pnt1) + 1;
console.log("pnt1 = " + pnt1 + "; pnt2 = " + pnt2);
console.log("DBSysInfo.substring =n" + DBSysInfo.substring(pnt1, pnt2));

The above code works as expected on Linux:

DBSysInfo =
SysLocation = "C:UsersmlakeMELGenKey"  
  
DBActive = "yes"  
DBName = "SOT2-KILLE20240704"  
DBUserID = "2.0"  
DBStatus = "1"  
DBSecurity = "0"  
DBLocation = "DBs/SOT2-KILLE20240704"  


pnt1 = 42  
pnt1 = 42; pnt2 = 176  
DBSysInfo.substring =  
DBActive = "yes"  
DBName = "SOT2-KILLE20240704"  
DBUserID = "2.0"  
DBStatus = "1"  
DBSecurity = "0"  
DBLocation = "DBs/SOT2-KILLE20240704"  

On Windows, the output is:

DBSysInfo =  
SysLocation = "C:UsersmlakeMELGenKey"  
  
DBActive = "yes"  
DBName = "SOT2-KILLE20240704"  
DBUserID = "2.0"  
DBStatus = "1"  
DBSecurity = "0"  
DBLocation = "DBs/SOT2-KILLE20240704"  
  
  
pnt1 = 42  
pnt1 = 42; pnt2 = 0  
DBSysInfo.substring =  
SysLocation = "C:UsersmlakeMELGenKey"  

I don’t understand why the output would be different on Windows. Why would pnt2 be 0? The only thing I can think is the second “indexOf” statement is treating “DBSysInfo” as an array. If so, why? Is global treated differently on Windows than it is on Linux?

I tried using both Edge and Firefox on Windows with the same results, but the code is in node and I wouldn’t think the browser used would make any difference in this instance.