Introduction to javascript Classes
what is a JavaScript Object?
javascript objects, 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
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. object 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?
Objects are very helpful because they allow us to combine related functions and data into one clear unit. This approach helps reduce complexity in our code and makes it easier to understand and organize, especially in larger systems.
For example, if you are developing a website that needs to
manage user data, you can store each user's details—like name, email address,
and age—in an object. This way, you can easily access and change the user's
data without handling many 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
Example :
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 :-
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 are a basic part of the language. They
provide a strong way to store and manipulate data. Understanding the features
of JavaScript objects is essential for becoming skilled in JavaScript. In the
next sections, we will look at the main characteristics that define JavaScript
objects.
Example:
let book = {
name: "data structure",
isbook: true
};
Benefits of Using Objects in JavaScript
. JavaScript objects are essential features of the language.
They provide developers with important tools. Whether you are creating basic
scripts or complex web applications, using objects can significantly enhance
your coding performance. Here are some of the key benefits of using objects in
JavaScript.
1.Organization of data
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
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console.log(person.name);
• Letters in parentheses:
JavaScript scripting
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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
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for account = { 1 .
add: function (a,b)
{ .
return a + b;
}
};
