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Different ways to create a copy of an object in JavaScript

By Gulshan Saini
Published in JavaScript
January 03, 2023
1 min read

There are several ways to create a copy of an object in JavaScript. Here are some of the options:

  1. The Object.assign() method can be used to create a copy of an object. This method copies the values of all enumerable own properties from one or more source objects to a target object. Here’s an example:
const originalObject = { a: 1, b: 2, c: 3 };
const copy = Object.assign({}, originalObject);
  1. The spread operator (...) can also be used to create a shallow copy of an object. A shallow copy is a copy of the object that contains references to the same objects as the original object. Here’s an example:
const originalObject = { a: 1, b: 2, c: 3 };
const copy = { ...originalObject };
  1. You can use the JSON.parse() and JSON.stringify() methods to create a deep copy of an object. A deep copy is a copy of the object that contains copies of all the objects in the original object, rather than references to the same objects. Here’s an example:
const originalObject = { a: 1, b: 2, c: 3 };
const copy = JSON.parse(JSON.stringify(originalObject));
  1. Finally, you can use a library like Lodash or underscore, which provide utility functions for creating copies of objects. For example, you can use the _.cloneDeep() function from Lodash to create a deep copy of an object.
const originalObject = { a: 1, b: 2, c: 3 };
const copy = _.cloneDeep(originalObject);

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#javascript
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Gulshan Saini

Gulshan Saini

Fullstack Developer

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JavaScript
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