Introduction to javascript Classes
what is a JavaScript Object?
Using objects, you may divide code into logical sections and group together similar data. Primitive values and reference values are terms used in JavaScript. Primitive values include Number, Boolean, Null, Undefined, Strings, and Symbol; reference values include things like DOM nodes, Arrays, and so on.
What is an object?
An object in JavaScript is a grouping of linked information and features. Key-value pairs are used to store this data, with each key—also referred to as a property name having a distinct value assigned to it. These values might be functions, other objects, strings, or even integers. In essence, a JavaScript object is much like any other real-world object, such as a person, a home, or an automobile, each with unique traits and actions.
Example :-
let car =
{
name :"safari",
color : "royale blue",
price:" 15 lakh to 25 lakh",
year:"2024",
model:"xz+",
start:function() {
console.log("car started");
}
};
This example car object five properties - name, color, price, year, model key-value paire keys strings("name","model","year","color","price") value are "safari", "xz+" and 2024 , respectively. five property, start
Why Use Objects?
Because they let us combine related functions and data into a single, coherent entity, objects are very helpful. This helps manage complexity in our code and makes it easier to comprehend and organize, especially in bigger systems.
If you're developing a website that must manage user data, for instance, you may keep each user's details (such as name, email address, and age) in an object. In this manner, you may simply access and modify the user's data without having to deal with a large number of different variables.
example :-
let user = {
name : "geeta",
email : "geeta@gmail.com",
age : 40,
user greet:function()
{
console.log('hi');
}
};
user object store the user name, email,age with user greet method prints.
creating and using objects
create a object using object literal. object properties 'title','author','year'. & method details
Example :
let book ={
title : ' data structure';
author: ' lipschute' ;
Price: 500 ;
};
C++ robort lafore 600
Modifying Objects :-
modify existing ones or even delete properties.
Example :-
book.title =' C++'; //modify existing property
book.subject = 'program';//add new property
delete book.proce; / /remove property
Syntax :-
let objectName = {
key1:value1,
key2:value2,
//more key-value pairs
};
Example :-
let book ={
title : ' data structure';
author: 'Narasimha
Karumanchi ' ;
Price: 500 ;
};
Explanation :-
book is the object name.
title,author, and price properties of object.
data structire, Narasimha
Karumanchi, and 500 values
JavaScript Object
Characteristics
1. JavaScript objects
constitute a fundamental aspect of the language, offering a robust mechanism
for data storage and manipulation. A comprehensive understanding of the
attributes of JavaScript objects is crucial for achieving proficiency in
JavaScript. In the following sections, we will examine the primary
characteristics that define JavaScript objects.
1. Key-Value Pairs At the core
of every JavaScript object lies the principle of key-value pairs. An object can
be viewed as a collection of these pairs, where each key (also referred to as a
property) is linked to a specific value.
• Keys: The identifiers of the properties,
which may be represented as strings or symbols.
• Values: The data linked to the keys, which
can encompass any type, including strings, numbers, arrays, functions, or even
other objects.
Example:
let book = {
name: "data structure",
Price: 500 ;
isbook: true
};
Benefits of Using Objects in JavaScript
1. JavaScript objects serve as a fundamental element of
the language, providing numerous advantages that are essential for developers.
Regardless of whether you are creating basic scripts or intricate web
applications, grasping the benefits of utilizing objects can greatly improve
your coding efficiency and overall effectiveness. Below are some of the primary
advantages of employing objects in JavaScript.
1. JavaScript objects are core features of the language, providing developers with important utility. No matter if you are developing basic scripts or complex web applications, using objects can greatly improve your coding performance and overall Below are some of the key benefits of using objects in JavaScript . . . .
1. Organization of data
The main advantage of objects is the ability to organize and organize data in a coherent and logical way. By grouping related data, objects increase the readability and maintainability of your code.
2. Reusability
Objects increase code reuse, especially when used in conjunction with functions or classes. By creating objects with data and services, you can effortlessly reuse and extend them to your application.
3. Sequence and protochain
JavaScript objects use prototype properties, which allow them to inherit properties and methods from other objects. This capability facilitates the creation of hierarchical systems and shared functionality between components
4. Dynamic change
JavaScript objects exhibit high levels of robustness, allowing the objects and methods to be added, modified, or removed in real time. These changes make it easy to change your evolving product needs without having to overhaul your codebase.
5. Support for JSON
JavaScript objects are natively compatible with JSON (JavaScript Object Notation), which is a widely used format for data exchange. This consistency makes it easy to sequence and deserialize data, especially when interacting with APIs or performing data collection.
6. Easy ways to adapt
JavaScript provides many built-in methods for manipulating objects, making them easier to work with. These methods include Object.keys(), Object.values(), Object.entries(), Object.assign(), .
Conclusions about JavaScript objects
1. A JavaScript object acts as an ordered collection of interrelated data and functions, organized as key-value pairs. These features play an important role in creating sophisticated data structures and applications in JavaScript. Having a solid understanding of how to create, navigate, and manipulate objects will greatly enhance your skills as a JavaScript developer. Whether it’s processing basic data or building complex web applications, customizability is an important milestone in your journey developing with JavaScript.
FAQs :-
1. What is a JavaScript object?
A JavaScript object is a collection of key-value pairs, where each key is a unique identifier (property) that maps to a specific value. Objects can store data types such as strings, numbers, settings, functions, or even other objects.
2. How do you create an object in JavaScript?
There are many ways to do things in JavaScript:
• Object Literal Syntax : Typical method.
JavaScript scripting
Copy the code
ma cart = {
is: "Toyota", .
Example: "Corolla", .
The year is
};
3. How do you get the properties of an object?
You can access the object using dot notation or bracket notation.
• Reference points:
JavaScript scripting
Copy the code
console.log(person.name);
• Letters in parentheses:
JavaScript scripting
Copy the code
console.log(person["mfe"]);
Dot characters are more common, but parentheses are useful when a property name is dynamic or contains special characters.
5. What is a method used in a JavaScript object?
A method is a function stored as a property of an object. Methods enable objects to work with their data.
For example:
JavaScript scripting
Copy the code
for account = { 1 .
add: function (a,b) { .
return a + b;
}
};
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