javascript - How to extend a primitive type in typescript? -

I want to create an interface like this:

  Show interface {show (): String; } Function doit (s: show) {return 'shown:' + s.show (); }   
 Then we can use it with a new class:  
  square fu {s: string; Creator (S: String) {this.s = s; } Showing () {Return 'with Foo' '+ + this.s +' ''; }} Console.log (doit (new foo ('hello'));   
 I want to do the same for the  number  s in plain javascript i < Code> number , for example, please satisfy this interface like this:  
  number.prototype.show = function () {return '' + this ;}   
 But typecript does not allow me to:  
  show.ts (18,18): error TS2094: property 'shows' does type The value of 'number' is not present at   
 is there any way to do this Simply tell the typewrite by adding it to  number :  
 
 
  
  Interface number {show (): string;} number. Protopp. Show = function () {return "'+ this;} var foo = 123; foo.show ();