# Pick properties from an object

Build a new object with only the requested own properties.

Canonical: https://1loc.dev/object/pick-a-subset-of-properties-of-an-object/
Version: 1.0.0
Runtime: JavaScript · Node.js 22 / modern browsers
Verification: Local fixtures; no external services
Updated: 2026-10-28

## Implementation

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

## Input

```json
{
  "value": {
    "from": "orders@your-verified-domain.example",
    "to": "ana@example.com",
    "subject": "Order 8812 confirmed",
    "internalNote": "VIP customer"
  },
  "keys": [
    "from",
    "to",
    "subject"
  ]
}
```

## Expected output

```json
{
  "from": "orders@your-verified-domain.example",
  "to": "ana@example.com",
  "subject": "Order 8812 confirmed"
}
```

## Edge case

Input:
```json
{
  "value": {
    "a": 1
  },
  "keys": [
    "missing"
  ]
}
```
Output:
```json
{}
```

## Limits

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

The lab validates types and size before calling this function. Add equivalent validation at your own trust boundary.

## Source and license

Original: https://github.com/phuocng/1loc/blob/14b481cf60dff1620ab1bb99a43b1f68068cdd9b/contents/pick-a-subset-of-properties-of-an-object.mdx
Author: Nguyen Huu Phuoc and original contributors
Contributors: See original repository history
Source commit: 14b481cf60dff1620ab1bb99a43b1f68068cdd9b
Copyright (c) 2020 phuoc-ng
License: MIT — https://1loc.dev/licenses/
Maintainer: Oveyon
Modifications: Curated implementation; explicit input bounds, edge cases, local fixtures and rebuilt presentation. Original MDX retained as inert source evidence.