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Exploring Object Cloning Techniques in JavaScript

How to Duplicate Objects Safely and Efficiently

Max N
2 min readMar 22, 2024
Photo by Phil Shaw on Unsplash

Object cloning is a common operation in JavaScript where developers need to create copies of objects without altering the original reference.

In this article, we will explore various object cloning techniques available in JavaScript along with up-to-date code examples to help you understand the process clearly.

Understanding Object Cloning

Object cloning refers to creating an exact replica of an existing object. It is crucial when you want to work with independent copies of objects without affecting the original data. Let’s dive into different methods of object cloning in JavaScript:

Shallow Copy

A shallow copy creates a new object with references to the original object’s properties. While it duplicates the top-level properties, nested objects are still shared between the original and cloned objects. Here’s how you can perform a shallow copy:

const originalObj = { name: 'Alice', age: 30 };
const clonedObj = { ...originalObj };

console.log(clonedObj); // Output: { name: 'Alice', age: 30 }

Deep Copy

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Max N
Max N

Written by Max N

A writer that writes about JavaScript and Python to beginners. If you find my articles helpful, feel free to follow.

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