How to Get the Class Name of an Object in JavaScript

Feb 25, 2019


Welcome to Genevish Graphics, your comprehensive resource for arts & entertainment in the field of visual arts and design. In this tutorial, we'll explore a common challenge faced by JavaScript developers - getting the class name of an object.

Understanding JavaScript Objects

Before we dive into getting the class name of an object, it's important to have a foundational understanding of JavaScript objects. In JavaScript, objects are a fundamental data structure that allows us to store and manipulate complex data. Objects are made up of properties and methods, which are essentially variables and functions respectively. They provide a way to organize and structure data in a meaningful way.

Why Do We Need to Know the Class Name of an Object?

Knowing the class name of an object can be incredibly useful in various scenarios. It allows us to perform specific actions or make decisions based on the type of object we are working with. For example, in a visual arts and design application, we might have different classes that represent different shapes. By knowing the class name, we can apply specific styling or functionality to each shape type.

Method 1: Using the constructor property

One way to get the class name of an object in JavaScript is by accessing the constructor property:

const obj = new SomeClass(); const className =; console.log(className); // Output: SomeClass

Method 2: Leveraging instanceof operator

Another approach is to use the instanceof operator, which allows us to check if an object is an instance of a specific class:

const obj = new SomeClass(); if (obj instanceof SomeClass) { console.log('Object belongs to SomeClass'); } else { console.log('Object does not belong to SomeClass'); }

Method 3: Using Object.prototype.toString()

An alternative method involves using the toString() method from the Object.prototype. This method returns a string representation of the object, including the class name:

const obj = new SomeClass(); const className =, -1); console.log(className); // Output: SomeClass

Choosing the Right Method

Each of the methods mentioned above has its own advantages and considerations. The preferred method depends on the specific use case and the JavaScript environment you are working with. It's important to understand the differences and choose the most suitable approach for your project.


In conclusion, understanding how to get the class name of an object in JavaScript is essential for effective coding in the visual arts and design domain. Whether you choose to use the constructor property, the instanceof operator, or the toString() method, having this knowledge will enhance your ability to create dynamic and personalized experiences in your next arts & entertainment project.

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John Campanella
Finally, a tutorial that demystifies JavaScript objects. Thank you!
Nov 9, 2023
Freddie Ward
Thanks for explaining this in a way that's easy to understand, great tutorial!
Oct 19, 2023
Wilson Viator
Great tutorial! 👍
Oct 8, 2023
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Mar 26, 2022
Not Provided
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Mar 20, 2022
Place Holder
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Mar 17, 2022
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Finally, a clear explanation on how to get the class name of an object in JavaScript.
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Finally, a tutorial that makes getting the class name in JavaScript clear. Thank you!
Feb 24, 2022
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Feb 18, 2022
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Nov 19, 2021
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Feb 12, 2020
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Mar 3, 2019