Lodash's cloneDeep() Function

Lodash’s cloneDeep() Function

Lodash’s cloneDeep() Function

In this post, we will give you information about Lodash’s cloneDeep() Function. Here we will give you detail about Lodash’s cloneDeep() Function And how to use it also give you a demo for it if it is necessary.

You can use lodash’s cloneDeep() function to deep copy a value.

const _ = require('lodash');

const obj = [{ a: 1, b: 2 }];

const copy = _.cloneDeep(obj);
console.log(copy); // [{ a: 1, b: 2 }];

With Classes

If you call cloneDeep() on an instance of a class, cloneDeep() will also copy the class information.

class MyClass {};
const obj  = new MyClass();

const copy = _.cloneDeep(obj);
copy instanceof MyClass; // true

Warning: Proxies

cloneDeep() does not work well with Mongoose documents or reactive objects in Vue.
With Vue, the cloned object will not be reactive.
With Mongoose documents, you won’t be able to save the cloned document.

const _ = require('lodash');
const mongoose = require('mongoose');
async function run() {
  await mongoose.connect('mongodb://localhost:27017/test5');

  const arr2Schema = new mongoose.Schema({ _id: false, prop1: String });
  const arr1Schema = new mongoose.Schema({ _id: false, arr2: [arr2Schema] });
  const Test = mongoose.model(
    new mongoose.Schema({
      arr1: [arr1Schema],
      field: String,

  let doc = new Test({ arr1: [{ arr2: [{ prop1: 'test' }] }] });
  await doc.save();

  const doc2 = await Test.findById(doc._id);
  const newDoc = _.cloneDeep(doc2).set({ field: 'test' });

  await newDoc.save(); // Mongoose-internal TypeError


In general, we only recommend using cloneDeep() on POJOs.

See also  Lodash's `merge()` Function

Lodash is a JavaScript library that provides utility functions for common programming tasks using the functional programming paradigm. Lodash is a JavaScript library that helps programmers write more concise and maintainable JavaScript. It can be broken down into several main areas: Utilities: for simplifying common programming tasks such as determining type as well as simplifying math operations(Lodash’s cloneDeep() Function).

Why Lodash?

Lodash makes JavaScript easier by taking the hassle out of working with arrays, numbers, objects, strings, etc.Lodash’s modular methods are great for:

  • Iterating arrays, objects, & strings
  • Manipulating & testing values
  • Creating composite functions

Hope this code and post will helped you for implement Lodash’s cloneDeep() Function – onlinecode. if you need any help or any feedback give it in comment section or you have good idea about this post you can give it comment section. Your comment will help us for help you more and improve us. we will give you this type of more interesting post in featured also so, For more interesting post and code Keep reading our blogs

See also  Lodash's `map()` Function

For More Info See :: laravel And github

We're accepting well-written guest posts and this is a great opportunity to collaborate : Contact US