String.prototype behavior

JavaScript
1 
String.prototype.hello = function() {
  console.log(`Hello ${this}`);
}

let name = new String('Carl');
name.hello();
'Carl'.hello();

can anyone point out for me why name.hello(); works but 'Carl'.hello(); does not?

2

I just copy/pasted your code and ran it with node and both work as intended. What makes you think the second one isn’t working?

3

Hi,

Do not use let because you already declare name with ‘new String(…)’.
That means you have to choose between:

  1. let name = ‘Carl’;
    or
  2. name = new String(‘Carl’); //without let!