Object duplication is an important requirement in JavaScript programming, and it plays an important role in ensuring secure data and avoid referencing. In JavaScript, there are two methods of object copying, "Shallow Copy" and "Deep Copy". However, many new developers in the field often have difficulty putting these methods into practice. So, in this article, we will learn how to clone objects in JavaScript easily and efficiently, including specific examples and important caveats when using these methods.

Before getting into the details of JavaScript object copying methods, let's take a look at what it means to do. copy object.

In JavaScript, objects are used to represent an entity or a set of properties and methods of a specific object. This is especially useful in managing data in web applications or server systems. However, when working with objects in JavaScript, you need to sometimes copy them to ensure data safety and avoid referencing.

For example, when you pass an object from one function to another in JavaScript, if you don't copy the object and pass only its reference, when the object's internal properties or methods change, this affects all objects that access it. This can cause unexpected problems in your application and make your code difficult to manage and maintain.

Therefore, object duplication is an important technique in JavaScript that helps you to solve management related problems data management and ensure the stability of your application. Next, we'll look at specific methods of object copying in JavaScript.

As mentioned at the beginning of the article, there are two main methods of copying objects in JavaScript: "Shallow Copy" and " Deep Copy". However, both of these methods have their own pros and cons, and you need to understand how they work before you use them.

"Shallow Copy" is a method of simply copying an object by creating a new copy of the original object. and point the properties of that copy to the values ​​of the original object. This means that if any properties of the original object change, the properties of the copy will also change.

"Deep Copy" is a method of fully copying an object by creating a complete copy of the object. original image. This includes both the properties and the internal child objects of the parent object. It ensures that if any properties of the original object are changed, the properties of the copy will not be affected.

However, copying objects using the "Deep Copy" method can be expensive in terms of performance, especially is when copying nested or large sized objects. Therefore, it is necessary to consider and choose the most appropriate method depending on the specific situation.

In this article, we'll dive into each method of object duplication and learn how to implement them in JavaScript. We'll also look at specific examples and important caveats when using these methods.

To begin with, we'll learn how to copy objects using the "Shallow Copy" method. To do this we can use some method like Object.assign() or spread operator.

The Object.assign() method is used to copy the properties of one or more objects and assign them to target object. To copy an object using the "Shallow Copy" method using Object.assign(), we can do the following: