Prototype in JavaScript:-

All the JavaScript objects has an object and its property called prototype & it is used to add and the custom functions and property. See Following example in which we create a property and function.

var empInstance = new employee();
empInstance.deportment = "Information Technology";
empInstance.listemployee = function(){

}

All JavaScript objects inherit properties and methods from a prototype.

Ex:-

<!DOCTYPE html>

<html>

<body>

<h2>JavaScript Objects</h2>

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

<script>

function Person(first, last, age, eye) {

this.firstName = first;

this.lastName = last;

this.age = age;

this.eyeColor = eye;

}

var myFather = new Person("John", "Doe", 50, "blue");

var myMother = new Person("Sally", "Rally", 48, "green");

document.getElementById("demo").innerHTML =

"My father is " + myFather.age + ". My mother is " + myMother.age;

</script>

</body>

</html>

Output:-

JavaScript Objects

My father is 50. My mother is 48

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