Pick properties from an object

Build a new object with only the requested own properties.

JavaScript Version 1.0.0 · MIT · .md

function pick({ value, keys }) { return Object.fromEntries(keys.filter(key => Object.hasOwn(value, key)).map(key => [key, value[key]])); }

Try in the local lab Download function

Input & expected output

Input

{
  "value": {
    "from": "[email protected]",
    "to": "[email protected]",
    "subject": "Order 8812 confirmed",
    "internalNote": "VIP customer"
  },
  "keys": [
    "from",
    "to",
    "subject"
  ]
}

Expected output

{
  "from": "[email protected]",
  "to": "[email protected]",
  "subject": "Order 8812 confirmed"
}

The edge case

Input

{
  "value": {
    "a": 1
  },
  "keys": [
    "missing"
  ]
}

Expected output

{}

Know the limits

Missing and inherited properties are skipped. Values are not deeply cloned.
JSON input has string property keys only.

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

Curated implementation; explicit input bounds, edge cases, local fixtures and rebuilt presentation. 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

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.
Check if multiple objects are equal — Compare JSON serializations with the first object.