[javascript] string.Replace in AngularJs

With c# there is a string.Replace-method. Like This:

string oldString = "stackoverflow";   

string newString= oldString.Replace("stackover","");

Output: flow

Can I do something similar to this with AngularJs?

My try doesn't work:

var oldString = "stackoverflow";

$scope.newString= oldString.Replace("stackover","NO");

The easiest way is:

var oldstr="Angular isn't easy";
var newstr=oldstr.toString().replace("isn't","is");

var oldString = "stackoverflow";
var str=oldString.replace(/stackover/g,"NO");
$scope.newString= str;

It works for me. Use an intermediate variable.