---
title: experimental.catch() function
description: >
  `experimental.catch()` calls a function and returns any error as a string value.
  If the function does not error the returned value is made into a string and returned.
menu:
  flux_v0_ref:
    name: experimental.catch
    parent: experimental
    identifier: experimental/catch
weight: 101

introduced: 0.174.0
---

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IMPORTANT: This page was generated from comments in the Flux source code. Any
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`experimental.catch()` calls a function and returns any error as a string value.
If the function does not error the returned value is made into a string and returned.



##### Function type signature

```js
(fn: () => A) => {value: A, msg: string, code: uint}
```

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

## Parameters

### fn
({{< req >}})
Function to call.




## Examples

### Catch an explicit error

```js
import "experimental"

experimental.catch(fn: () => die(msg: "error message"))// Returns "error message"


```