How To Create Prototype In JavaScript

How To Create Prototype In JavaScript

JavaScript is a programming language commonly used in web development. It was originally developed by Netscape as a means to add dynamic…

JavaScript is a programming language commonly used in web development. It was originally developed by Netscape as a means to add dynamic and interactive elements to websites. JavaScript is a client-side scripting language, which means the source code is processed by the client’s web browser rather than on the web server. This means JavaScript functions can run after a webpage has loaded without communicating with the server. For example, a JavaScript function may check a web form before it is submitted to make sure all the required fields have been filled out. The JavaScript code can produce an error message before any information is actually transmitted to the server.

Prototype in JavaScript

JavaScript is often described as a prototype-based language — to provide inheritance, objects can have a prototype object, which acts as a template object that it inherits methods and properties from.

An object’s prototype object may also have a prototype object, which it inherits methods and properties from, and so on. This is often referred to as a prototype chain, and explains why different objects have properties and methods defined on other objects available to them.

In JavaScript, a link is made between the object instance and its prototype (its proto property, which is derived from the prototype property on the constructor), and the properties and methods are found by walking up the chain of prototypes.

function person() {
    this.name = 'sanjam';
    this.gender = 'Male';
}
var personObj1 = new person();
personObj1.age=21;
alert(personObj1.age);  //21
var personObj = new person();
alert(personObj.age);  //undefined

javascript

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