Quick Answer:<\/em><\/strong><\/p>\n\n\n\n A JavaScript prototype is an object from which other objects inherit properties and methods, enabling code reuse and shared behavior.<\/p>\n\n\n\n Prototypes in JavaScript<\/a><\/strong> are basically models that enable the objects<\/strong><\/a> in a program to access the properties of other objects. Properties and functions added to the prototype become accessible across all instances. This feature ensures inheritance and optimal memory usage.<\/p>\n\n\n\n Example:<\/em><\/strong><\/p>\n\n\n\n \/\/ Constructor function<\/strong><\/p>\n\n\n\n function Student(name) {<\/p>\n\n\n\n this.name = name;<\/p>\n\n\n\n }<\/p>\n\n\n\n \/\/ Adding a method to the prototype<\/strong><\/p>\n\n\n\n Student.prototype.sayHello = function() {<\/p>\n\n\n\n return “Hello, my name is ” + this.name;<\/p>\n\n\n\n };<\/p>\n\n\n\n \/\/ Creating one instance<\/strong><\/p>\n\n\n\n const student1 = new Student(“Amit”);<\/p>\n\n\n\n const student2 = new Student(“Yash”);<\/p>\n\n\n\n \/\/ Using the prototype method<\/strong><\/p>\n\n\n\n console.log(student.sayHello());<\/p>\n\n\n\n Explanation:<\/em><\/strong><\/p>\n\n\n\n Learn and gain valuable insights with our ultimate JavaScript resource for free:<\/em><\/strong> JS eBook<\/strong><\/a><\/p>\n\n\n\n In JavaScript<\/strong><\/a>, prototypes are\u2002essentially how an object shares methods with other objects.<\/p>\n\n\n\n Every object has a hidden link to another object called its prototype, and when you try\u2002to access a property or call a method, JavaScript will look first in that object; if it doesn\u2019t find it there, then on the linked prototype, then on the prototype of the prototype, and so on \u2014 this is known as the prototypal chain<\/strong>.<\/p>\n\n\n\n When you add properties or methods to a constructor function<\/strong><\/a>\u2019s prototype, all objects created from that constructor automatically have access to them, and this means saving memory as well as being able to inherit (i.e., one object can use features of another object through the chain).<\/p>\n\n\n\nPrototype in JavaScript: Definition<\/strong><\/h2>\n\n\n\n
![\"\"](\"https:\/\/www.guvi.in\/blog\/wp-content\/uploads\/2026\/04\/Prototype-in-JavaScript_-Definition-1200x630.png\" "\\"\\"")
<\/figure>\n\n\n\n\n
\n
Working Mechanism of Prototypes<\/strong><\/h2>\n\n\n\n
Understanding Object Inheritance in JavaScript<\/strong><\/h2>\n\n\n\n
![\"\"](\"https:\/\/www.guvi.in\/blog\/wp-content\/uploads\/2026\/04\/Understanding-Object-Inheritance-in-JavaScript-1200x630.png\" "\\"\\"")
<\/figure>\n\n\n\n
![\"\"](\"https:\/\/www.guvi.in\/blog\/wp-content\/uploads\/2026\/04\/What-is-a-Prototype-Chain_-1200x630.png\" "\\"\\"")
<\/figure>\n\n\n\n