Adding new properties to constructor function without .prototype

Question

when I have function I want to use as a constructor, say:

function clog(x){
    var text = x;
    return console.log(text );
}

And I have m

Answer 1

Adding a clog.alert function would simply a attach static function to the clog object. It will not be inherited and will not have access to the instance created with new clog(); in the alert function.

Adding clog.prototype.alert will make the new clog(); object you create inherit the function, and you will also have access to the instance inside using the this keyword.

function John() {
    this.id = 1;
}

John.doe = function() {
  console.log(this);
  console.log(this.id); // undefined
}

John.prototype.doe = function() {
    console.log(this);
};

John.doe(); // the John object

var me = new John();
me.doe(); // the instance, inherited from prototype
console.log(me.id); // 1