docs-v2/content/flux/v0/stdlib/experimental/objectkeys.md

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---
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]
```