Shallow copy an object

Copy own enumerable properties into a new object.

JavaScript Version 1.0.0 · MIT · .md

function shallowCopy(object) { return { ...object }; }

Try in the local lab Download function

Input & expected output

Input

{
  "to": "[email protected]",
  "data": {
    "name": "Ana"
  }
}

Expected output

{
  "to": "[email protected]",
  "data": {
    "name": "Ana"
  }
}

The edge case

Input

{}

Expected output

{}

Know the limits

Nested objects are shared, not copied. Use structuredClone for a deep copy.
The original second variant, obj => {...obj}, is a block, not an object literal; it needs parentheses.

The function above is the implementation used by the lab. The lab validates JSON types and caps size before execution; include equivalent validation when accepting untrusted input in your application.

Source & maintenance

Uses object spread; the original arrow variant obj => {...obj} was a syntax error. Original MDX retained as inert source evidence.

Maintained by Oveyon. Source commit: 14b481cf60df. Read the license.

Local fixture scope · Node.js 22.23.2 · reviewed October 28, 2026. No external service is required.

Keep exploring

Pick properties from an object — Build a new object with only the requested own properties.
Omit properties from an object — Keep the own enumerable fields that are not in a supplied list.
Create an object from pairs of key and value — Turn [key, value] pairs into a plain object with Object.fromEntries.