# How to Stop a function node from execution its following code?

**URL:** https://discourse.nodered.org/t/how-to-stop-a-function-node-from-execution-its-following-code/38828
**Category:** General
**Created:** [9 January 2021 09:44 UTC](https://discourse.nodered.org/t/how-to-stop-a-function-node-from-execution-its-following-code/38828 "2021-01-09T09:44:48Z")
**Posts on this page:** 6
**Page:** 1

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### Author: ![nicedevil](https://avatars.discourse-cdn.com/v4/letter/n/858c86/32.png) [@nicedevil](https://discourse.nodered.org/u/nicedevil)
#### Post date: [9 January 2021 09:44 UTC](https://discourse.nodered.org/t/how-to-stop-a-function-node-from-execution-its-following-code/38828/1 "2021-01-09T09:44:48Z")

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Heya,

I want to stop a function node from executing its code if a payload is f.e. not a number.  
Is there anything like "node.stop" or "node.break"?

I can't filter this in a node beforehand because there are more messages from other MQTT devices are going into.

Thank you in advance.

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### Author: ![ghayne](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/ghayne/32/39_2.png) [@ghayne](https://discourse.nodered.org/u/ghayne)
#### Post date: [9 January 2021 09:45 UTC](https://discourse.nodered.org/t/how-to-stop-a-function-node-from-execution-its-following-code/38828/2 "2021-01-09T09:45:45Z")

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Look for Q-gate in the library!  
 ![Opera Snapshot_2021-01-09_094629_discourse.nodered.org](https://us1.discourse-cdn.com/flex026/uploads/nodered/original/3X/0/2/0200b1723c591bb28a0b8f134955cd11bddd6c44.png)

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### Author: ![nicedevil](https://avatars.discourse-cdn.com/v4/letter/n/858c86/32.png) [@nicedevil](https://discourse.nodered.org/u/nicedevil)
#### Post date: [9 January 2021 09:52 UTC](https://discourse.nodered.org/t/how-to-stop-a-function-node-from-execution-its-following-code/38828/3 "2021-01-09T09:52:12Z")

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@ghayne thank you, but I think for just this "small feature" I don't wanna add a new package/plugin.

If nothing is available for just "stopping" a function node from executing its code I will return a message with just "null". Thougth there would be an "recommended" way then doing this

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### Author: ![dceejay](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/dceejay/32/38_2.png) [@dceejay](https://discourse.nodered.org/u/dceejay)
#### Post date: [9 January 2021 09:54 UTC](https://discourse.nodered.org/t/how-to-stop-a-function-node-from-execution-its-following-code/38828/4 "2021-01-09T09:54:13Z")

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Returning null does exactly that. Nothing is passed on. That is the recommended method.

```
if ( isNaN(msg.payload)) { return null; }
```

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### Author: ![nicedevil](https://avatars.discourse-cdn.com/v4/letter/n/858c86/32.png) [@nicedevil](https://discourse.nodered.org/u/nicedevil)
#### Post date: [9 January 2021 09:55 UTC](https://discourse.nodered.org/t/how-to-stop-a-function-node-from-execution-its-following-code/38828/5 "2021-01-09T09:55:07Z")

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haha, thank you 😃

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### Author: ![system](https://us1.discourse-cdn.com/flex026/uploads/nodered/original/1X/d073cd938eafa2e558d7c2cd59003b3ef4963033.png) [@system](https://discourse.nodered.org/u/system)
#### Post date: [23 January 2021 09:55 UTC](https://discourse.nodered.org/t/how-to-stop-a-function-node-from-execution-its-following-code/38828/6 "2021-01-23T09:55:34Z")

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