Using Javascript to remove end of URL

Question

Using window.location.pathname I get "/Mobile/Evol/12-20-2011".

Using Javascript, how could I drop off everything after "Evol/" so that I get "/Mobile/Evol/"?

Answer 1

You can use a combination of the substring() and lastIndexOf() functions to easily cut off everything after the last /:

uri    = "/Mobile/Evol/12-20-2011";
newUri = uri.substring(0, uri.lastIndexOf('/'));

as @josh points out if there are more directories after "/Evol", this fails. You can fix this by searching for the string 'Evol/' then adding its length back to the substring end:

dir = "Evol/";
newUri = uri.substring(0, uri.lastIndexOf(dir) + dir.length);

Chrome console gives me this output:

> uri    = "/Mobile/Evol/12-20-2011";
"/Mobile/Evol/12-20-2011"

> dir = "Evol/";
  newUri = uri.substring(0, uri.lastIndexOf(dir) + dir.length);
"/Mobile/Evol/"

Answer 2

Just use "split" function in JavaScript string,

var url = '/Mobile/Evol/12-20-2011';
var tokens = url.split('/');
var reqURL = token[0] + '/'+ token[1] ;

Of course the URL format must be the same some_string/some_string/some_string