Javascript Objects

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by vsasikalabe dot icon Updated: Feb 24, 2023

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Objects are the combination of variables, functions, and data structures in programming. The objects can store values, manipulate values, and combine them into more complex objects, like arrays. You can create an object using three ways: Using an object. By creating an Object directly. By using the constructor function. An object is a set of key-value pairs. Each key-value pair is called a property. The string is the key to a property. The property value can be any of a number, a string, an array, or a function. 


Accessing properties 

We can use any one of these two notations to access a property of an object: 

  • the dot notation  
  • array-like notation. 

We can use the assignment operator (=) to change the value of a property. We use the delete operator to delete a property of an object. We can use the in operator to review when a property exists in an object. When the propertyName exists in the objectName, the in operator returns true. 

In JavaScript, "everything" is an object. 

  • If defined with the new keyword, Booleans can be objects. 
  • When the new keyword is defined with Numbers, it can be objects 
  • When the new keyword is defined with Strings, it can be objects  
  • Dates are always objects 
  • Maths are always objects 
  • Regular expressions are always objects 
  • Arrays are always objects 
  • Functions are always objects 
  • Objects are always objects 

All JavaScript values, except primitives, are objects. 

Types of Objects in JavaScript 

  • User-defined Objects - It is created to develop a software object model such as Bank accounts, students, houses, cars, companies, etc. 
  • Built-in Objects / Predefined Objects - A built-in object is an object of the primitive and non-primitive data types to handle some specific tasks. 


Here is an example of how to create Javascript Objects: 

Preview of the output that you will get on running this code from your IDE.

Code

Instructions

Follow the steps carefully to get the output easily.

  1. Download and Install VS Code on your Desktop.
  2. Open the VS Code and install Javascript ES6 Code Snippet and Code Runner from Extensions.
  3. Open the new file and save as example.js
  4. Copy the code using the "Copy" button above, and paste it in your javascript file.
  5. Run the code using (ctr+alt+N) Run button.


I hope you found this useful. I have added version information in the following sections.


I found this code snippet by searching for ' javascript objects' in kandi. You can try any such use case!

Environment Tested

I tested this solution in the following versions. Be mindful of changes when working with other versions.

  1. The solution is created in VS Code 1.73.1 version.
  2. JavaScript (ES6) code snippets v1.8.0
  3. Code Runner v0.11.8


Using this solution, we are able to use javascript objects with simple steps. This process also facilities an easy way to use, hassle-free method to create a hands-on working version of code which would help us to use javascript objects.

Support

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