Making a Deep Copy of an Object in JavaScript

In JavaScript, when cloning an object via Object.assign({}, obj) or by destructuring it (e.g.{...obj}, only shallow copies are created.

Surma has explored some unusual ways – other than JSON.parse(JSON.stringify(obj)); to create an actual deep copy:

1. MessageChannel
2. History API
3. Notification API

(told you they were unusual ;))

Deep-copying in JavaScript →