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JavaScript Object-Oriented JavaScript (2015) Introduction to Methods Understanding this

Can't figure out what I'm supposed to do here...

It says: "Finally, finish off the code to correctly access the properties on the contact with the this keyword."

object.js
var contact = {
  firstName: "Andrew",
  lastName: "Chalkley",
  fullName: function() {
    console.log(firstName + " " + lastName);
  }
}

3 Answers

So now you have firstName and lastName outside of the fullName function, so when referenced them with just their name the function will not be able to find them because they are not inside there anymore. By using the keyword this you can access other properties on the object you are currently inside which happens to be the contact object. So...

contact.firstName //used to access firstName outside of contact object
this.firstName //used to access firstName inside of contact object

Make sense?

var contact = { firstName: "Andrew", lastName: "Chalkley", fullName: function() { console.log(this.firstName + " " + this.lastName); } }

I get it now. Thank you! :)

No problem :)