# onNodeStart

Field in [DialogueRunner](https://docs.yarnspinner.dev/3.1/api/csharp/yarn.unity/yarn.unity.dialoguerunner)

## Summary

A Unity event that is called when a node starts running.

```csharp
public UnityEventString? onNodeStart;
```

## Remarks

This event receives as a parameter the name of the node that is about to start running.

## See Also

* [Dialogue.NodeStartHandler](https://docs.yarnspinner.dev/3.1/api/csharp/yarn/yarn.dialogue/yarn.dialogue.nodestarthandler): Gets or sets the [NodeStartHandler](https://docs.yarnspinner.dev/3.1/api/csharp/yarn/yarn.nodestarthandler) that is called when a node is started.