Does JavaScript have a built in stringbuilder class?

Question

I see a few code project solutions.

But is there a regular implementation in JavaScript?

Answer 1

In C# you can do something like

 String.Format("hello {0}, your age is {1}.",  "John",  29) 

In JavaScript you could do something like

 var x = "hello {0}, your age is {1}";
 x = x.replace(/\{0\}/g, "John");
 x = x.replace(/\{1\}/g, 29);