Replace All Characters In Specific Group To Asterisks

I found this SO post that is close, but I want to expand on this question a bit. I need to replace each character (within a group of the regex) to an asterisk. For example Hello, m

Solution 1:

You can use a replacement function with String.prototype.replace which will get the matching text and groups.

var input = 'Hello, my password is: SecurePassWord';
var regex = /(Hello, my password is: )(\w+)/;
var output = input.replace(regex, function(match, $1, $2) {
  // $1: Hello, my password is: // $2: SecurePassWord// Replace every character in the password with asterisksreturn $1 + $2.replace(/./g, '*');
});
console.log(output);

Solution 2:

Maybe if you don't especially need regex.

With :

var password = "something";

You can do :

var mystring = "My passsword is " + Array(password.length).join("*");

Or :

var mystring = "My passsword is " + password;
mystring = mystring.replace(password, Array(password.length).join("*"));