Looking for substring alternative javascript

Question

Basically my problem is I am using the substring method on the variable version for the result then to be used inside a URL using ng-href:

substring(0, 3)
version 9.1.0 = 9.1 (good)
version 9.2.0 = 9.2 (good)
version 9.3.0 = 9.3 (good)
..
version 9.10.0 = 9.1 (breaks here)
version 10.1.0 = 10. (breaks here)

As you can see eventually the substring method stops working, how can I fix this??

Answer 1

You can get the substring the other way by removing the last two character which will be a dot and a numeric character:

function version(val){
  console.log(val.substring(0,val.length-2))
} 
version('9.1.0');
version('9.2.0');
version('9.3.0');
version('9.10.0');
version('10.1.0');

But what if there are two numeric character and a dot at the end? Here is that solution:

function version(val){
  var tempVersion = val.split('.');
  tempVersion.pop();
  console.log(tempVersion.join('.'))
} 
version('9.1.0');
version('9.2.0');
version('9.3.1020');
version('9.10.0');
version('10.1.0123');