This site is mobile accessible. Press the "Tap Here" button to use a smaller font-size. Tap Here!

Smartphone icons created by Freepik - Flaticon

The JavaScript this Keyword

In this example this refers to person2, even if it is a method of person1:

const person1 = {
  fullName: function() {
    return this.firstName + " " + this.lastName;
  }
}

const person2 = {
  firstName:"John",
  lastName: "Doe",
}

let x = person1.fullName.call(person2); 
document.getElementById("demo").innerHTML = x;