With the development of web technology, JavaScript has become one of the main tools for website development. As you read in the article “The Complete Guide to Data Types in JavaScript”, there are many different data types in the JavaScript language. Each of these data has its characteristics and uses.
Consider the code of a large website. The code size of a complete website can be hundreds to thousands of lines. Hundreds of variables and different data types are defined in this amount of code. Since order in programming is considered one of the most important skills in programming, the JavaScript programmer must use methods to use this information and data in an orderly and categorized manner in the code, so that the code is clean, readable, and understandable. be
The concept of Objects or objects in JavaScript was created for this purpose. Objects are one of the basic concepts of JavaScript language. This article is a practical guide about objects and their use in JavaScript.
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What are objects (Objects) in JavaScript?
In JavaScript, objects are a type of data that allows the programmer to store a group of similar information in one place.
For example, suppose you want to store the information of 30 different people. Using 30 separate variables for each person and their information can make the code complicated and heavy. However, by using objects, this information can be stored in an organized and grouped manner. In simpler terms, objects are like boxes that hold different types of data (eg name, age, address) inside them.
The difference between objects and other data types in JavaScript
The main difference between objects and other data types in JavaScript is that objects are capable of holding various types of data such as numbers, strings, arrays, functions, and other objects, while other data types are limited to a specific type of data. For example, a variable of type Number can only store a number, and a variable of type String can only store a string.
In general, objects are used to store related data and to structure code more logically. Objects provide the possibility to store different data with any type of properties in an Object.
Using other objects in an object
As mentioned, an object can contain other objects. This concept is called Nested Objects or “internal objects”. That is, an object can hold another object inside itself.
Using functions in objects
An object in JavaScript can also contain a function.
Changing the value of an attribute on objects
To change the value of a property, the equal operator (=) is used.
Add new properties to objects
Unlike some programming languages such as Java and C#, where it is not possible to add a new property to an object after it is created, in JavaScript you can add a new property to an object after defining it.
Delete an object attribute
To delete an attribute or feature from an Object, the delete operator is used.
Checking the presence of a feature in an object
To check whether an attribute exists in an object or not, the “in” operator is used. The “in” operator returns true if there is a property with the desired name (propertyName) inside the desired object (objectName), and false otherwise.
Objects in JavaScript programming language play a very important and key role in data structure and coding. By using Objects, it is possible to store different data in a categorized and organized way. These objects contain various properties that can be manipulated using operations such as add, modify, and delete. Also, by using operators like “in” it is possible to check whether a specific feature exists in an object or not.