calling this of other function using javascript

Question

How to call below function and my expected output is "Hi John, my name is James"

function Person(name){
  this.name = name;
}

Person.prototype.greet = function(otherName){
  return "Hi " + otherName + ", my name is " + name; // not working
}

name is not defined in above code.

Answer 1

Use this.name

function Person(name){
  this.name = name;
}

Person.prototype.greet = function(otherName){
  return "Hi " + otherName + ", my name is " + this.name;
}

var p = new Person("Foo");
console.log(p.greet("Bar"));   // "Hi Bar, my name is Foo"

Answer 2

to access the properties attached on the this object, well.. you have to call this.

function Person(name){
  this.name = name;
}

Person.prototype.greet = function(otherName){
  return "Hi " + otherName + ", my name is " + this.name;
}