Adding new methods to classes in JavaScript? [closed]

Question

Closed. This question needs details or clarity. It is not currently accepting answers.

---

Want to improve this question? Add details and clarify the problem by editing this post.

Closed 8 years ago.

Improve this question

In Ruby we can add a new method to a previously defined class by dynamically modifying it at runtime:

class String
  def to_magic
    "magic"
  end
end

Is it possible to do the same in JavaScript? If yes, how?

Answer 1

The equivalent in JavaScript:

String.prototype.toMagic = function(){ 
   return "magic"; 
}

console.log("".toMagic());//>>> "magic"