---
title: experimental.objectKeys() function
description: >
  `experimental.objectKeys()` returns an array of property keys in a specified record.
menu:
  flux_v0_ref:
    name: experimental.objectKeys
    parent: experimental
    identifier: experimental/objectKeys
weight: 101

introduced: 0.40.0
---

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`experimental.objectKeys()` returns an array of property keys in a specified record.



##### Function type signature

```js
(o: A) => [string] where A: Record
```

{{% caption %}}
For more information, see [Function type signatures](/flux/v0/function-type-signatures/).
{{% /caption %}}

## Parameters

### o
({{< req >}})
Record to return property keys from.




## Examples

### Return all property keys in a record

```js
import "experimental"

user = {firstName: "John", lastName: "Doe", age: 42}

experimental.objectKeys(o: user)// Returns [firstName, lastName, age]


```