Review:
Object.assign() (shallow Copy And Merge)
overall review score: 4.2
⭐⭐⭐⭐⭐
score is between 0 and 5
Object.assign() is a method in JavaScript used for copying the values of all enumerable own properties from one or more source objects to a target object. It performs a shallow copy, meaning nested objects are not cloned but referenced, and it also serves as a convenient way to merge multiple objects into one. This function is widely used for object cloning, merging configurations, or combining properties efficiently.
Key Features
- Performs a shallow copy of property values from source objects to a target object
- Can merge multiple source objects into a single target object
- Modifies and returns the target object directly
- Useful for object cloning and composition
- Available in ECMAScript 2015 (ES6) and later
Pros
- Simple and concise syntax for copying and merging objects
- Efficient for shallow copying tasks
- Supports multiple source objects in a single call
- Widely supported across modern JavaScript environments
Cons
- Performs only a shallow copy; nested objects are referenced rather than duplicated
- Cannot clone deep structures without additional utilities
- Overwrites existing properties on the target object if conflicts occur
- Lacks customizable merge behavior compared to dedicated merging libraries