Object Prototypes

<!DOCTYPE html>
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<h2>JavaScript Objects</h2>

<p>The prototype property allows you to add new methods to objects constructors:</p>

<p id="demo"></p>

<script>
function Person(first, last, age, eye) {
  this.firstName = first;
  this.lastName = last;
  this.age = age;
  this.eyeColor = eye;
}

Person.prototype.nationality = "Arabic ";

const myFather = new Person("Mostaf", "ezzat", 50, "blue");
document.getElementById("demo").innerHTML =
"The nationality of my father is " + myFather.nationality; 
</script>

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