68 lines
1.7 KiB
Markdown
68 lines
1.7 KiB
Markdown
---
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title: experimental.catch() function
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description: >
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`experimental.catch()` calls a function and returns any error as a string value.
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If the function does not error the returned value is made into a string and returned.
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menu:
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flux_v0_ref:
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name: experimental.catch
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parent: experimental
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identifier: experimental/catch
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weight: 101
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introduced: 0.174.0
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---
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<!------------------------------------------------------------------------------
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IMPORTANT: This page was generated from comments in the Flux source code. Any
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edits made directly to this page will be overwritten the next time the
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documentation is generated.
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To make updates to this documentation, update the function comments above the
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function definition in the Flux source code:
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https://github.com/influxdata/flux/blob/master/stdlib/experimental/experimental.flux#L1375-L1375
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Contributing to Flux: https://github.com/influxdata/flux#contributing
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Fluxdoc syntax: https://github.com/influxdata/flux/blob/master/docs/fluxdoc.md
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------------------------------------------------------------------------------->
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`experimental.catch()` calls a function and returns any error as a string value.
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If the function does not error the returned value is made into a string and returned.
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##### Function type signature
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```js
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(fn: () => A) => {value: A, msg: string, code: uint}
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```
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{{% caption %}}
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For more information, see [Function type signatures](/flux/v0/function-type-signatures/).
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{{% /caption %}}
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## Parameters
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### fn
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({{< req >}})
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Function to call.
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## Examples
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### Catch an explicit error
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```js
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import "experimental"
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experimental.catch(fn: () => die(msg: "error message"))// Returns "error message"
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```
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