Is String a Primitive type or Object in Javascript?

Question

Is String a Primitive type or Object in Javascript? Source says Undefined, Null, Boolean, Number and String are all primitive types in Javascript. But it says String is an O

Answer 1

Both.

There is a String object and there are string literals.

You can call any string method on a literal and you can call any string method on a string object.

The major difference is that a string object generates a new object so new String("foo") !== new String("foo")

That and a String object is type "object" and not "string"

How to check for both?

if(typeof(s) == "string" || s instanceof String){
  //s is a string (literal or object)
}

Credits to @Triynko for the snippet in the comments