How to call function after ".", javascript

Question

I have this sample function, and i want to call it in this format :

const myfunc = (string) => {
   return string.length
}

console.log("check_length".myfunc())

How can i do that? Thanks for answers in advance!

Answer 1

The only way is to mutate the prototype of String with a classic function for accessing this.

String.prototype.myfunc = function () {
   return this.length;
};

console.log("check_length".myfunc());